— Unscored

Microsoft Windows Link Following Vulnerability

CVE-2026-81963 Exploited

Microsoft Windows Update Stack contains a link following vulnerability that allows a local attacker to escalate privileges locally up to SYSTEM.

Being exploited in the wild

Catalogued 8 September 2026 · US federal remediation deadline 22 September 2026

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…

Exploit code is also public: Public PoC

Public PoCrsah35404-star/stunning-octo-doodle

Assessment

CVSS: Not yet scored
Severity: Unscored
Known exploited: Yes — listed in the CISA KEV catalog
Exploit availability: CISA KEV, Public PoC
Published: 8 September 2026
Last updated: 8 September 2026
Affected: Microsoft · Windows
Weakness: CWE-284, CWE-59

At the source

CISA KEV

References

https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Query this programmatically

Agents can read this through the MCP endpoint, or over HTTP:

curl https://www.cve.zerocrew.in/api/cve/CVE-2026-81963