Local privilege escalation via use-after-free
Published Sep 8, 2026 · Updated Sep 10, 2026
Use-after-free in Microsoft Windows Security Center on affected Windows builds allows local users to elevate privileges through local access. Microsoft identifies reuse of freed memory in Windows Security Center but does not disclose the affected routine, object, or attacker-controlled input. Exploitation requires low privileges, local access, and high-complexity conditions; successful elevation grants control beyond the initiating account.
Summary
What happened
Use-after-free in Microsoft Windows Security Center on affected Windows builds allows local users to elevate privileges through local access. Microsoft identifies reuse of freed memory in Windows Security Center but does not disclose the affected routine, object, or attacker-controlled input. Exploitation requires low privileges, local access, and high-complexity conditions; successful elevation grants control beyond the initiating account.
The record
- CVE
- CVE-2026-77899
- Published
- Sep 8, 2026
- Updated
- Sep 10, 2026
- Vendor
- Microsoft
- Product
- Windows 11, version 25H2
- Classifications
- CWE-416, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.26200.0 <10.0.26200.9445
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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