CVE-2023-36761
published 2023-09-12CVE-2023-36761: Microsoft Word Information Disclosure Vulnerability
PriorityP276medium6.5CVSS 3.1
AVNACLPRNUIRSUCHINAN
KEVITW
CISA Known Exploited Vulnerabilitydue 2023-10-03
Exploited in the wild
EPSS
18.96%
97.0th percentile
Microsoft Word Information Disclosure Vulnerability
Affected
18 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_365_apps_for_enterprise | >= 16.0.1 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_office_2019 | >= 19.0.0 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_office_ltsc_2021 | >= 16.0.1 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_word_2013_service_pack_1 | >= 15.0.1 < 15.0.5589.1001 | 15.0.5589.1001 |
| microsoft | microsoft_word_2016 | >= 16.0.1 < 16.0.5413.1000 | 16.0.5413.1000 |
| microsoft | office | — | — |
| microsoft | office_long_term_servicing_channel | — | — |
| microsoft | word | — | — |
| microsoft | word | — | — |
| msrc | microsoft_365_apps_for_enterprise_for_32-bit_systems | — | — |
| msrc | microsoft_365_apps_for_enterprise_for_64-bit_systems | — | — |
| msrc | microsoft_office_2019_for_32-bit_editions | — | — |
| msrc | microsoft_office_2019_for_64-bit_editions | — | — |
| msrc | microsoft_office_ltsc_2021_for_32-bit_editions | — | — |
| msrc | microsoft_office_ltsc_2021_for_64-bit_editions | — | — |
| msrc | microsoft_word_2013_rt_service_pack_1 | — | — |
| msrc | microsoft_word_2013_service_pack_1 | — | — |
| msrc | microsoft_word_2016 | — | — |
Detection & IOCsextracted from sources · hover to see the quote
- →The Preview Pane in Microsoft Word is an active attack vector for CVE-2023-36761 — monitor for suspicious Word file previews triggering network authentication attempts (NTLM hash leakage). ↗
- →Exploitation requires a user to open or preview a malicious Word file — hunt for Word processes initiating outbound SMB/NTLM authentication to external hosts. ↗
- →CVE-2023-36761 was exploited in the wild prior to the September 2023 Patch Tuesday and has public proof-of-concept code — treat any unpatched Microsoft Word instance as actively at risk. ↗
- ·The exact exploitation mechanism in Microsoft Word is unspecified by Microsoft; the disclosed impact is limited to NTLM hash disclosure, not code execution. ↗
- ·The vulnerability is described as 'unspecified' in its technical details; only the disclosure type (NTLM hashes) and attack vectors (file open + Preview Pane) are confirmed. ↗
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
vulncheck6.5MEDIUM
cisa6.5MEDIUM
vendor_msrc6.5MEDIUM
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GHSA
GHSA-4w9h-xcp4-6v33: Microsoft Word Information Disclosure Vulnerability
ghsa_unreviewed·2023-09-12
CVE-2023-36761 [MEDIUM] CWE-20 GHSA-4w9h-xcp4-6v33: Microsoft Word Information Disclosure Vulnerability
Microsoft Word Information Disclosure Vulnerability
VulnCheck
Microsoft Word Information Disclosure Vulnerability
vulncheck·2023·CVSS 6.5
CVE-2023-36761 [MEDIUM] CWE-668 Microsoft Word Information Disclosure Vulnerability
Microsoft Word Information Disclosure Vulnerability
Microsoft Word contains an unspecified vulnerability that allows for information disclosure.
Affected: Microsoft Word
Required Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Exploitation References: https://api.msrc.microsoft.com/cvrf/v3.0/cvrf/2023-Sep; https://docs.google.com/spreadsheets/d/1lkNJ0uQwbeC1ZTRrxdtuPLCIl7mlUreoKfSIgajnSyY/edit; https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json; https://thehackernews.com/2023/09/microsoft-releases-patch-for-two-new.html; https://ti.qianxin.com/uploads/2024/02/02/dcc93e586f9028c68e7ab34c3326ff31.pdf
Remediation Due: 2023-10-03
CISA
Microsoft Word Information Disclosure Vulnerability
cisa·2023-09-12·CVSS 6.5
CVE-2023-36761 [MEDIUM] CWE-668 Microsoft Word Information Disclosure Vulnerability
Vulnerability: Microsoft Word Information Disclosure Vulnerability
Affected: Microsoft Word
Microsoft Word contains an unspecified vulnerability that allows for information disclosure.
Required Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Notes: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36761; https://nvd.nist.gov/vuln/detail/CVE-2023-36761
Remediation Due Date: 2023-10-03
Microsoft
Microsoft Word Information Disclosure Vulnerability
vendor_msrc·2023-09-12·CVSS 6.5
CVE-2023-36761 [MEDIUM] CWE-20 Microsoft Word Information Disclosure Vulnerability
Microsoft Word Information Disclosure Vulnerability
FAQ: What type of information could be disclosed by this vulnerability?
Exploiting this vulnerability could allow the disclosure of NTLM hashes.
FAQ: Is the Preview Pane an attack vector for this vulnerability?
Yes, the Preview Pane is an attack vector.
FAQ: According to the CVSS metric, user interaction is required (UI:R). What interaction would the user have to do?
A user needs to be tricked into running malicious files.
Microsoft Office Word: Microsoft Office Word
Microsoft: Microsoft
Customer Action Required: Yes
Impact: Information Disclosure
Exploit Status: Publicly Disclosed:Yes;Exploited:Yes;Latest Software Release:Exploitation Detected
Remediation: Click to Run
Reference: https://docs.microsoft.com/en-us/officeupdates/m
No detection rules found.
No public exploits indexed.
Bleepingcomputer
Microsoft October 2023 Patch Tuesday fixes 3 zero-days, 104 flaws
blogs_bleepingcomputer·2023-10-10·CVSS 5.3
CVE-2023-5346 [MEDIUM] Microsoft October 2023 Patch Tuesday fixes 3 zero-days, 104 flaws
## Microsoft October 2023 Patch Tuesday fixes 3 zero-days, 104 flaws
## Lawrence Abrams
26 Elevation of Privilege Vulnerabilities
3 Security Feature Bypass Vulnerabilities
45 Remote Code Execution Vulnerabilities
12 Information Disclosure Vulnerabilities
17 Denial of Service Vulnerabilities
1 Spoofing Vulnerabilities
The total count of 104 flaws does not include one Chromium vulnerability tracked as CVE-2023-5346, which was fixed by Google on October 3rd and ported to Microsoft Edge.
To learn more about the non-security updates released today, you can review our dedicated articles on the new Windows 11 KB5031354 cumulative update and Windows 10 KB5031356 cumulative update .
## Three actively exploited zero-day vulnerabilities
This month's Patch Tuesday fixes three zero-day vulne
Tenable
Microsoft’s October 2023 Patch Tuesday Addresses 103 CVEs (CVE-2023-36563, CVE-2023-41763)
blogs_tenable·2023-10-10·CVSS 6.5
[MEDIUM] Microsoft’s October 2023 Patch Tuesday Addresses 103 CVEs (CVE-2023-36563, CVE-2023-41763)
## Cloud Exposure
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## Vulnerability Exposure
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## AI Exposure
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## OT/IoT Exposure
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## Identity Exposure
Tenable Identity Exposure Request a demo
## Business needs
Active Directory
AI Security Posture Management (AI-SPM)
AWS security
Azure security
Cloud Security Posture Man
Checkpoint
18th September – Threat Intelligence Report
blogs_checkpoint·2023-09-18
CVE-2023-26369 18th September – Threat Intelligence Report
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For the latest discoveries in cyber research for the week of 11th September, please download our Threat_Intelligence Bulletin .
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The American resort, casino and hotel chain MGM has suffered a cyber-attack that resulted in widespread disruption across the company’s hotels and casinos, and has shut down its internal networks as a precaution. The cyber-attack paralyzed the company’s ATMs, slot machines, room digital key cards and electronic paymen
Talos
Turns out even the NFL is worried about deepfakes
blogs_talos·2023-09-14
Turns out even the NFL is worried about deepfakes
## Turns out even the NFL is worried about deepfakes
Welcome to this week’s edition of the Threat Source newsletter.
I’m at the point in the calendar year where I’m a sponge for NFL content. I couldn’t be happier to escape from my six-month American football-free slumber and am ready to watch games three days a week and listen to NFL podcasts or read power rankings the other four.
So of course, I wasn’t going to miss this feature in Dark Reading from the NFL’s chief information security officer, which just happens to include several shoutouts to Talos and Cisco . Talos is a valuable security partner with the NFL, helping secure their major events like the NFL Draft and Super Bowl, the most-watched entertainment event in the U.S. every year.
One of the things that Tomás Maldonado said i
Talos
Turns out even the NFL is worried about deepfakes
blogs_talos·2023-09-14
Turns out even the NFL is worried about deepfakes
Welcome to this week’s edition of the Threat Source newsletter.
I’m at the point in the calendar year where I’m a sponge for NFL content. I couldn’t be happier to escape from my six-month American football-free slumber and am ready to watch games three days a week and listen to NFL podcasts or read power rankings the other four.
So of course, I wasn’t going to miss this feature in Dark Reading from the NFL’s chief information security officer, which just happens to include several shoutouts to Talos and Cisco. Talos is a valuable security partner with the NFL, helping secure their major events like the NFL Draft and Super Bowl, the most-watched entertainment event in the U.S. every year.
One of the things that Tomás Maldonado said in the Dark Reading interview really stood out to me — t
Krebs
Adobe, Apple, Google & Microsoft Patch 0-Day Bugs
blogs_krebs·2023-09-12·CVSS 6.5
[MEDIUM] Adobe, Apple, Google & Microsoft Patch 0-Day Bugs
Microsoft today issued software updates to fix at least five dozen security holes in Windows and supported software, including patches for two zero-day vulnerabilities that are already being exploited. Also, Adobe , Google Chrome and Apple iOS users may have their own zero-day patching to do.
On Sept. 7, researchers at Citizen Lab warned they were seeing active exploitation of a “zero-click,” zero-day flaw to install spyware on iOS devices without any interaction from the victim.
“The exploit chain was capable of compromising iPhones running the latest version of iOS (16.6) without any interaction from the victim,” the researchers wrote.
According to Citizen Lab, the exploit uses malicious images sent via iMessage , an embedded component of Apple’s iOS that has been the source of previo
Qualys
Microsoft and Adobe Patch Tuesday, September 2023 Security Update Review
blogs_qualys·2023-09-12
Microsoft and Adobe Patch Tuesday, September 2023 Security Update Review
## Table of Contents
Microsoft Patch Tuesday for September 2023
Adobe Patches for September 2023
Zero-day Vulnerability Patched in September Patch Tuesday Edition
Other Critical Severity Vulnerabilities Patched in September Patch Tuesday Edition
Other Microsoft Vulnerability Highlights
Microsoft Release Summary
Discover and Prioritize Vulnerabilities in Vulnerability Management, Detection & Response (VMDR)
Rapid Response with Patch Management (PM)
EVALUATE Vendor-Suggested Mitigation with Policy Compliance (PC)
EXECUTE Mitigation Using Qualys Custom Assessment and Remediation (CAR)
Qualys Monthly Webinar Series
Microsoft has released the Patch Tuesday edition for September. This month’s updates have addressed 66 security vulnerabilities (including Edge Chromium-based) in multip
Bleepingcomputer
Microsoft September 2023 Patch Tuesday fixes 2 zero-days, 59 flaws
blogs_bleepingcomputer·2023-09-12·CVSS 6.5
[MEDIUM] Microsoft September 2023 Patch Tuesday fixes 2 zero-days, 59 flaws
## Microsoft September 2023 Patch Tuesday fixes 2 zero-days, 59 flaws
## Lawrence Abrams
3 Security Feature Bypass Vulnerabilities
24 Remote Code Execution Vulnerabilities
9 Information Disclosure Vulnerabilities
3 Denial of Service Vulnerabilities
5 Spoofing Vulnerabilities
5 Edge - Chromium Vulnerabilities
The total count of 59 flaws does not include five Microsoft Edge (Chromium) vulnerabilities two non-Microsoft flaws in Electron and Autodesk.
To learn more about the non-security updates released today, you can review our dedicated articles on the new Windows 11 KB5030219 cumulative update and Windows 10 KB5030211 updates released.
## Two actively exploited zero-day vulnerabilities
This month's Patch Tuesday fixes two zero-day vulnerabilities, with both exploited in attacks
Krebs
Adobe, Apple, Google & Microsoft Patch 0-Day Bugs
blogs_krebs·2023-09-12·CVSS 6.5
[MEDIUM] Adobe, Apple, Google & Microsoft Patch 0-Day Bugs
Microsoft today issued software updates to fix at least five dozen security holes in Windows and supported software, including patches for two zero-day vulnerabilities that are already being exploited. Also, Adobe, Google Chrome and Apple iOS users may have their own zero-day patching to do.
On Sept. 7, researchers at Citizen Lab warned they were seeing active exploitation of a “zero-click,” zero-day flaw to install spyware on iOS devices without any interaction from the victim.
“The exploit chain was capable of compromising iPhones running the latest version of iOS (16.6) without any interaction from the victim,” the researchers wrote.
According to Citizen Lab, the exploit uses malicious images sent via iMessage, an embedded component of Apple’s iOS that has been the source of previous
Talos
Microsoft Patch Tuesday for September 2023 — Unusually low 5 critical vulnerabilities included in Microsoft Patch Tuesday, along with two zero-days
blogs_talos·2023-09-12·CVSS 8.0
[HIGH] Microsoft Patch Tuesday for September 2023 — Unusually low 5 critical vulnerabilities included in Microsoft Patch Tuesday, along with two zero-days
Microsoft disclosed 65 vulnerabilities across its suite of products and software Tuesday, only five of which are considered critical, which is very low compared to Microsoft’s usual security updates.
However, there are two issues disclosed and patched this month that have already been exploited in the wild.
Fifty-six of the vulnerabilities included in this month’s Patch Tuesday are considered “important,” according to Microsoft, while two are of “moderate” severity. One remote code execution vulnerability in Microsoft Exchange Server, CVE-2023-36756, was meant to be included in August’s security update but was mistakenly excluded. Users should ensure the August 2023 security update for Exchange is already downloaded to remediate this issue.
One of the vulnerabilities adversaries are alr
Tenable
Microsoft’s September 2023 Patch Tuesday Addresses 61 CVEs (CVE-2023-36761)
blogs_tenable·2023-09-12·CVSS 6.5
[MEDIUM] Microsoft’s September 2023 Patch Tuesday Addresses 61 CVEs (CVE-2023-36761)
## Cloud Exposure
Tenable Cloud Security (CNAPP) Request a demo
Tenable Cloud Vulnerability Management Request a demo
Tenable CIEM Request a demo
Secure your cloud
## Vulnerability Exposure
Tenable Vulnerability Management Try for free
Tenable Security Center Request a demo
Tenable Web App Scanning Try for free
Tenable Patch Management Request a demo
Tenable Enclave Security Request a demo
Tenable Attack Surface Management Request a demo
Tenable Nessus Try for free
## AI Exposure
Tenable AI Exposure Request a demo
## OT/IoT Exposure
Tenable OT Security Request a demo
## Identity Exposure
Tenable Identity Exposure Request a demo
## Business needs
Active Directory
AI Security Posture Management (AI-SPM)
AWS security
Azure security
Cloud Security Posture Man
Talos
Microsoft Patch Tuesday for September 2023 — Unusually low 5 critical vulnerabilities included in Microsoft Patch Tuesday, along with two zero-days
blogs_talos·2023-09-12·CVSS 8.0
[HIGH] Microsoft Patch Tuesday for September 2023 — Unusually low 5 critical vulnerabilities included in Microsoft Patch Tuesday, along with two zero-days
## Microsoft Patch Tuesday for September 2023 — Unusually low 5 critical vulnerabilities included in Microsoft Patch Tuesday, along with two zero-days
Microsoft disclosed 65 vulnerabilities across its suite of products and software Tuesday, only five of which are considered critical, which is very low compared to Microsoft’s usual security updates.
However, there are two issues disclosed and patched this month that have already been exploited in the wild.
Fifty-six of the vulnerabilities included in this month’s Patch Tuesday are considered “important,” according to Microsoft, while two are of “moderate” severity. One remote code execution vulnerability in Microsoft Exchange Server, CVE-2023-36756 , was meant to be included in August’s security update but was mistakenly excluded. Users
Qualys
Microsoft and Adobe Patch Tuesday, September 2023 Security Update Review | Qualys
blogs_qualys·2023-09-12
Microsoft and Adobe Patch Tuesday, September 2023 Security Update Review | Qualys
#### Table of Contents
- Microsoft Patch Tuesday for September 2023
- Adobe Patches for September 2023
- Zero-day Vulnerability Patched in September Patch Tuesday Edition
- Other Critical Severity Vulnerabilities Patched in September Patch Tuesday Edition
- Other Microsoft Vulnerability Highlights
- Microsoft Release Summary
- Discover and Prioritize Vulnerabilities in Vulnerability Management, Detection & Response (VMDR)
- Rapid Response with Patch Management (PM)
- EVALUATE Vendor-Suggested Mitigation with Policy Compliance (PC)
- EXECUTE Mitigation Using Qualys Custom Assessment and Remediation (CAR)
- Qualys Monthly Webinar Series
Microsoft has released the Patch Tuesday edition for September. This month’s updates have addressed 66 security vulnerabilities (including Edge Chromium-ba
Crowdstrike
September 2023 Patch Tuesday: Updates and Analysis
blogs_crowdstrike·CVSS 7.5
CVE-2026-20929 [HIGH] September 2023 Patch Tuesday: Updates and Analysis
How CrowdStrike is Accelerating Exposure Evaluation as Adversaries Gain Speed Apr 06, 2026
STARDUST CHOLLIMA Likely Compromises Axios npm Package Apr 01, 2026
Falcon for IT Supports Windows Secure Boot Certificate Lifecycle Management Apr 01, 2026
Detecting CVE-2026-20929: Kerberos Authentication Relay via CNAME Abuse Mar 31, 2026
How CrowdStrike is Accelerating Exposure Evaluation as Adversaries Gain Speed Apr 06, 2026
STARDUST CHOLLIMA Likely Compromises Axios npm Package Apr 01, 2026
Falcon for IT Supports Windows Secure Boot Certificate Lifecycle Management Apr 01, 2026
Detecting CVE-2026-20929: Kerberos Authentication Relay via CNAME Abuse Mar 31, 2026
Video Highlights the 4 Key Steps to Successful Incident Response Dec 02, 2019
Helping Non-Security Stakeholders Understand AT
2023-09-12
Published
2023-09-12
Added to CISA KEV
Exploited in the wild