CVE-2026-65660
Microsoft SharePoint Server Remote Code Execution Vulnerability
CVE-2026-65660 is a high vulnerability (CVSS 8.8) in Microsoft Sharepoint, published August 11, 2026. CISA lists it as known to be exploited, since September 25, 2026. EUVD reports exploitation since September 25, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 8.19%, the 94th percentile. No source names a fixed version.
Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Microsoft SharePoint Server Remote Code Execution Vulnerability
Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
- Record
CVE-2026-65660- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Weakness
- CWE-94
- Updated
- 2026-11-02
EUVDEUVD-2026-56431
Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
- Record
EUVD-2026-56431- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-r94x-x846-rxqx
Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows...
Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.
- Record
GHSA-r94x-x846-rxqx- CVSS 3.1
- 6.5 Medium
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-94
- Updated
- 2026-11-02
CISA KEV No score
Microsoft SharePoint Code Injection Vulnerability
Microsoft SharePoint contains a code injection vulnerability which could allow an authorized attacker to execute code over a network.
- Record
CVE-2026-65660- Weakness
- CWE-94
- Updated
- 2026-11-02
NVD
Improper control of generation of code ('code injection') in Microsoft Office SharePoint allows an authorized attacker to execute code over a network.
- Record
CVE-2026-65660- CVSS 3.1
- 8.8 High
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-94
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| PoC in GitHub | HORKimhab/CVE-2026-65660 | 2026-09-25 |
| PoC in GitHub | ShadowForge-Cyber/CVE-2026-65660-Poc | 2026-09-25 |
History
| When | Changed | Sources |
|---|---|---|
| 2026-11-03 | exploitation | |
| 2026-11-02 | created | CVE List, EUVD, GitHub Advisories, CISA KEV, NVD, PoC in GitHub |
References
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65660
blog.previdian.com/cve-2026-65660-previdian-observes-two-stage-sharepoint-exploitation-attempts
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-65660
nvd.nist.gov/vuln/detail/CVE-2026-65660
github.com/advisories/GHSA-r94x-x846-rxqx