CVE-2026-65660
published 2026-08-11CVE-2026-65660: Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
PriorityP187high8.8CVSS 3.1
AVNACLPRLUINSUCHIHAH
KEVITW
CISA Known Exploited Vulnerabilitydue 2026-09-28
Exploited in the wild
EPSS
2.10%
81.5th percentile
Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| microsoft | microsoft_sharepoint_enterprise_server_2016 | >= 16.0.0 < 16.0.5565.1001 | 16.0.5565.1001 |
| microsoft | microsoft_sharepoint_server_2019 | >= 16.0.0 < 16.0.10417.20198 | 16.0.10417.20198 |
| microsoft | microsoft_sharepoint_server_subscription_edition | >= 16.0.0 < 16.0.19725.20522 | 16.0.19725.20522 |
| microsoft | sharepoint_server | < 16.0.19725.20522 | 16.0.19725.20522 |
| microsoft | sharepoint_server | — | — |
| microsoft | sharepoint_server | — | — |
CVSS provenance
nvdv3.18.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vulncheck8.8HIGH
cisa8.8HIGH
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GHSA
Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
ghsa_unreviewed·2026-08-11
CVE-2026-65660 [MEDIUM] CWE-94 Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
VulnCheck
Microsoft SharePoint Improper Control of Generation of Code ('Code Injection')
vulncheck·2026·CVSS 8.8
CVE-2026-65660 [HIGH] Microsoft SharePoint Improper Control of Generation of Code ('Code Injection')
Microsoft SharePoint Improper Control of Generation of Code ('Code Injection')
Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Affected: Microsoft SharePoint
Required Action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Exploitation References: https://previdian.com/CVE-2026-65660
CISA
Microsoft SharePoint Code Injection Vulnerability
cisa·2026-09-25·CVSS 8.8
CVE-2026-65660 [HIGH] CWE-94 Microsoft SharePoint Code Injection Vulnerability
Vulnerability: Microsoft SharePoint Code Injection Vulnerability
Affected: Microsoft SharePoint
Microsoft SharePoint contains a code injection vulnerability which could allow an authorized attacker to execute code over a network.
Required Action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
Notes: https://msrc.microsoft.com/update-guide/vulnerability/
No detection rules found.
No public exploits indexed.
Hackernews
SharePoint RCE and MikroTik RouterOS Flaws Actively Exploited in the Wild
blogs_hackernews·2026-09-26·CVSS 8.8
CVE-2026-65660 [HIGH] SharePoint RCE and MikroTik RouterOS Flaws Actively Exploited in the Wild
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## SharePoint RCE and MikroTik RouterOS Flaws Actively Exploited in the Wild
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Friday added two security flaws impacting Microsoft SharePoint and Mikrotik RouterOS to its Known Exploited Vulnerabilities ( KEV ) catalog, citing evidence of active exploitation.
The vulnerabilities in question are as follows -
CVE-2026-65660 (CVSS score: 8.8) - A code injection vulnerability in Microsoft Office SharePoint that allows an authorized attacker to execute code over a network.
CVE-2026-67279 (CVSS score: 6.9) - An improper enforcement of behavioral workflow vulnerabilit
Hackernews
SharePoint Flaw Initially Listed as Spoofing by Microsoft Enables Authenticated RCE
blogs_hackernews·2026-09-22·CVSS 9.1
CVE-2026-65660 [CRITICAL] SharePoint Flaw Initially Listed as Spoofing by Microsoft Enables Authenticated RCE
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## SharePoint Flaw Initially Listed as Spoofing by Microsoft Enables Authenticated RCE
A SharePoint Server vulnerability that Microsoft initially classified as a spoofing flaw with a CVSS score of 6.5 actually enables authenticated remote code execution, according to full technical details published today by Viettel Cyber Security researcher Dinh Ho Anh Khoa.
The flaw, CVE-2026-65660 , affects SharePoint Server 2016, 2019, and Subscription Edition. Patches have been available since the August 11 security updates , and the National Vulnerability Database scores it 8.8.
Microsoft's advisory describes CVE-2026-65660 as allowing a
Rapid7
Patch Tuesday - August 2026
blogs_rapid7·2026-08-11·CVSS 7.2
CVE-2026-68821 [HIGH] Patch Tuesday - August 2026
Microsoft is publishing 421 vulnerabilities on August 2026 Patch Tuesday , including 236 vulnerabilities in Windows. This is lower volume than last month’s record-breaking behemoth, but still one of the largest Patch Tuesday totals ever. There is no reason to suppose that Patch Tuesday will ever return to the lower volumes we saw prior to 2026. Microsoft is aware of exploitation in the wild for one of the vulnerabilities published today, as well as public disclosure for two others, although the Notable CVEs section of the Security Update Guide omits one of these. As usual, browser vulns are not included in the Patch Tuesday count above, but unusually, Microsoft does not appear to have published any desktop browser security patches so far this month.
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Tenable
Microsoft's August 2026 Patch Tuesday Addresses 398 CVEs (CVE-2026-68820)
blogs_tenable·2026-08-11·CVSS 7.0
CVE-2026-68820 [HIGH] Microsoft's August 2026 Patch Tuesday Addresses 398 CVEs (CVE-2026-68820)
## Microsoft's August 2026 Patch Tuesday Addresses 398 CVEs (CVE-2026-68820)
42 Critical
355 Important
1 Moderate
0 Low
Microsoft addresses 398 CVEs in the eighth Patch Tuesday of 2026, with three zero-days, including one that was exploited in the wild.
Microsoft patched 398 CVEs in its August 2026 Patch Tuesday release, with 42 rated critical, 355 rated as important and one rated as moderate. Our counts omitted two CVEs assigned by MITRE; CVE-2026-6726 and CVE-2026-6727.
This month’s update includes patches for:
.NET
.NET Core
.NET Framework
AMD Zen
Active Directory Certificate Services (AD CS)
Application Information Services
Azure Active Directory
Azure CycleCloud
Azure Monitor Agent
Azure Storage Explorer
Capability Access Management Service (camsvc)
Desktop Window M
Sans Isc
Microsoft Patch Tuesday August 2026, (Tue, Aug 11th)
blogs_sans_isc·2026-08-11·CVSS 7.8
CVE-2026-68820 [HIGH] Microsoft Patch Tuesday August 2026, (Tue, Aug 11th)
Microsoft Patch Tuesday August 2026
Published: 2026-08-11. Last Updated: 2026-08-11 17:54:49 UTC
by Renato Marinho (Version: 1)
0 comment(s)
This month we got patches for 418 vulnerabilities. Of these, 62 are critical, 1 is being exploited in the wild, and 2 were publicly disclosed as zero-days. Notable fixes include Windows privilege escalation, container tampering, and critical QUIC and DNS Server remote code execution bugs.
A few vulnerabilities worth mentioning:
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability (CVE-2026-68820)
This Important-severity elevation of privilege vulnerability is listed by Microsoft as exploited in the wild but not publicly disclosed, and it has a CVSS score of 7.0. The flaw is a use-after-free issue in the Windows Ancil
2026-08-11
Published
2026-09-25
Added to CISA KEV
Exploited in the wild