CVE-2026-20963
Microsoft SharePoint Remote Code Execution Vulnerability
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Listed in CISA KEV
- Fix
- Fixed in 16.0.5535.1001, 16.0.10417.20083, 16.0.19127.20442
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
Microsoft SharePoint, a widely used collaboration and document management platform, is affected by this vulnerability. An unauthenticated attacker over a network could exploit it to run malicious code on the affected server.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
- EPSS reached 10%
FIRST estimates at least a 10% chance of exploitation in the next 30 days
Affected versions
- Microsoft Microsoft SharePoint Enterprise Server 2016
From 16.0.0 · fixed in 16.0.5535.1001
- Microsoft Microsoft SharePoint Server 2019
From 16.0.0 · fixed in 16.0.10417.20083
- Microsoft Microsoft SharePoint Server Subscription Edition
From 16.0.0 · fixed in 16.0.19127.20442