CVE-2026-45463
published 2026-06-09CVE-2026-45463: Integer underflow (wrap or wraparound) in Microsoft Office allows an unauthorized attacker to execute code locally.
PriorityP349high8.4CVSS 3.1
AVLACLPRNUINSUCHIHAH
EPSS
0.34%
26.1th percentile
Integer underflow (wrap or wraparound) in Microsoft Office allows an unauthorized attacker to execute code locally.
Affected
9 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_2016 | >= 16.0.0 < 16.0.5556.1005 | 16.0.5556.1005 |
| microsoft | microsoft_office_2019 | >= 19.0.0 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_office_365_for_mac | >= 1.0.0 < 16.110.26061317 | 16.110.26061317 |
| microsoft | microsoft_office_for_android | >= 16.0.1 < 16.0.20131.20024 | 16.0.20131.20024 |
| microsoft | microsoft_office_ltsc_2021 | >= 16.0.1 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_office_ltsc_2024 | >= 16.0.0 < https://aka.ms/OfficeSecurityReleases | https://aka.ms/OfficeSecurityReleases |
| microsoft | microsoft_office_ltsc_for_mac_2021 | >= 16.0.1 < 16.110.26061317 | 16.110.26061317 |
| microsoft | microsoft_office_ltsc_for_mac_2024 | >= 16.0.0 < 16.110.26061317 | 16.110.26061317 |
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VulDB
Microsoft Office up to LTSC 2024 integer underflow (Nessus ID 321311)
vuldb·2026-06-21·CVSS 8.4
CVE-2026-45463 [HIGH] Microsoft Office up to LTSC 2024 integer underflow (Nessus ID 321311)
A vulnerability classified as critical was found in Microsoft Office up to LTSC 2024. This issue affects some unknown processing. Executing a manipulation can lead to integer underflow.
This vulnerability is registered as CVE-2026-45463. It is possible to launch the attack remotely. No exploit is available.
It is best practice to apply a patch to resolve this issue.
GHSA
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
ghsa_unreviewed·2026-06-09
CVE-2026-45463 [HIGH] CWE-121 Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
Heap-based buffer overflow in Microsoft Office allows an unauthorized attacker to execute code locally.
No detection rules found.
No public exploits indexed.
Qualys
Microsoft and Adobe Patch Tuesday, June 2026 Security Update Review
blogs_qualys·2026-06-09
CVE-2026-49160 Microsoft and Adobe Patch Tuesday, June 2026 Security Update Review
## Table of Contents
Microsoft Patch Tuesday forJune2026
Adobe Patch for June 2026
Zero-dayVulnerabilities Patched in June Patch Tuesday Edition
Critical Severity Vulnerabilities Patched inJunePatch Tuesday Edition
Other Microsoft Vulnerability Highlights
Microsoft Release Summary
EVALUATE Vendor-Suggested Mitigation with Policy Audit (PA)
Qualys Monthly Webinar Series
Every Patch Tuesday presents a race between defenders applying fixes and attackers seeking opportunities. Microsoft’s June 2026 release is no exception, delivering security updates for vulnerabilities that could significantly impact enterprise environments if left unaddressed.
## Microsoft Patch Tuesday for June 2026
This month’s release addresses 206 vulnerabilities, including 33 critical and 167 important-severi
Talos
Microsoft Patch Tuesday for June 2026 — Snort rules and prominent vulnerabilities
blogs_talos·2026-06-09·CVSS 8.8
CVE-2026-42985 [HIGH] Microsoft Patch Tuesday for June 2026 — Snort rules and prominent vulnerabilities
## Microsoft Patch Tuesday for June 2026 — Snort rules and prominent vulnerabilities
Microsoft has released its monthly security update for June 2026, which includes 206 vulnerabilities affecting a range of products, including 32 that Microsoft marked as “critical”.
Out of 32 "critical" entries, 28 are remote code execution (RCE) vulnerabilities in Microsoft Windows services and applications including Windows Active Directory, Windows Kerberos Key Distribution Centre (KDC), Windows Graphics component, Windows Remote Desktop client, Windows Deployment Services (WDS), DHCP Client service, Windows Hyper-V, Windows Kernel and Media, Azure Kubernetes Service (AKS), Microsoft Office, Microsoft Outlook, Microsoft Word, Microsoft SQL server and Windows HTTP Protocol Stack.
Talos highlights 4 cr
Sans Isc
Microsoft June 2026 Patch Tuesday, (Tue, Jun 9th)
blogs_sans_isc·2026-06-09·CVSS 8.8
CVE-2026-49160 [HIGH] Microsoft June 2026 Patch Tuesday, (Tue, Jun 9th)
Microsoft June 2026 Patch Tuesday
Published: 2026-06-09. Last Updated: 2026-06-09 17:34:29 UTC
by Johannes Ullrich (Version: 1)
0 comment(s)
Microsoft today released patches for 204 vulnerabilities. 38 of these vulnerabilities are considered critical, and three have been disclosed before today. Six of the vulnerabilities affect Microsoft cloud solutions and do not require any user action. In addition, Microsoft incorporated 360 different vulnerabilities affecting Chromium into its Edge browser.
This is certainly a busier-than-usual patch Tuesday. In particular, the large number of patched Chromium/Edge vulnerabilities underscores the impact of AI tools on vulnerability discovery.
Some noteworthy vulnerabilities:
CVE-2026-49160: This vulnerability was made public a week ago. As implem
Rapid7
Patch Tuesday - June 2026
blogs_rapid7·2026-06-09·CVSS 7.8
CVE-2026-33825 [HIGH] Patch Tuesday - June 2026
Microsoft is publishing 200 vulnerabilities on June 2026 Patch Tuesday . Microsoft is not aware of exploitation in the wild for any of these vulnerabilities, and is aware of public disclosure for three. This is similar to last month’s Patch Tuesday, however several of last month’s vulnerabilities ended up on CISA KEV in the days following their publication. So far this month, Microsoft has provided patches to address 360 browser vulnerabilities, which is an order of magnitude more than has been typical in any given month over the past few years. As usual, browser vulns are not included in the Patch Tuesday count above. Indeed, the vast, and presumably sustained, uptick in the number of browser vulnerabilities has led to Microsoft no longer enumerating Chromium CVEs in the Security Update G
Bleepingcomputer
Microsoft June 2026 Patch Tuesday fixes 3 zero-day, 200 flaws
blogs_bleepingcomputer·2026-06-09·CVSS 7.8
CVE-2026-45586 [HIGH] Microsoft June 2026 Patch Tuesday fixes 3 zero-day, 200 flaws
## Microsoft June 2026 Patch Tuesday fixes 3 zero-day, 200 flaws
## Lawrence Abrams
65 Elevation of Privilege Vulnerabilities
19 Security Feature Bypass Vulnerabilities
55 Remote Code Execution Vulnerabilities
30 Information Disclosure Vulnerabilities
7 Denial of Service Vulnerabilities
27 Spoofing Vulnerabilities
When BleepingComputer reports on Patch Tuesday security updates, we only count those released by Microsoft today.
Therefore, the number of flaws does not include flaws in Mariner, Azure HorizonDB, Microsoft Copilot, Copilot Chat, M365 Copilot, Microsoft Exchange Online, and Microsoft Graph that were fixed by Microsoft earlier this month.
There were also a massive 360 Microsoft Edge/Chromium flaws that were fixed by Google this month, which were excluded from this Patch
Crowdstrike
June 2026 Patch Tuesday: Microsoft Patches 206 Vulnerabilities Including Three Publicly Disclosed Zero-Days
blogs_crowdstrike
CVE-2026-45586 June 2026 Patch Tuesday: Microsoft Patches 206 Vulnerabilities Including Three Publicly Disclosed Zero-Days
CrowdStrike 2026 Technology Threat Landscape Report: China’s Ambitions Fuel Attacks Jun 09, 2026
June 2026 Patch Tuesday: Microsoft Patches 206 Vulnerabilities Including Three Publicly Disclosed Zero-Days Jun 09, 2026
CrowdStrike and Zscaler Bring Continuous Identity to Zero Trust Access Jun 08, 2026
3 Principles to Safely Scale Agentic AI Jun 05, 2026
CrowdStrike 2026 Technology Threat Landscape Report: China’s Ambitions Fuel Attacks Jun 09, 2026
June 2026 Patch Tuesday: Microsoft Patches 206 Vulnerabilities Including Three Publicly Disclosed Zero-Days Jun 09, 2026
CrowdStrike and Zscaler Bring Continuous Identity to Zero Trust Access Jun 08, 2026
3 Principles to Safely Scale Agentic AI Jun 05, 2026
Video Highlights the 4 Key Steps to Successful Incident Response Dec 02, 2019
Hel
2026-06-09
Published