CVE-2026-33825
Microsoft Defender Elevation of Privilege 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 4.18.26030.3011
- 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
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: active
- Automatable: no
- Technical impact: total
Summary
Microsoft Defender contains an access control flaw that lets a user who already has local access gain higher privileges on the affected system. The impact is that an attacker with a foothold on a device could take greater control over it than their account should allow.
Summarized by anthropic/claude-haiku-5.5. Verify details against the original sources.
Read the original description
Insufficient granularity of access control in Microsoft Defender allows an authorized attacker to elevate privileges locally.
Timeline
- CVE published
- Added to CISA KEV
CISA has evidence of exploitation in the wild
- CISA SSVC assessment
Exploitation: active · Automatable: no · Technical impact: total
- CISA remediation deadline
Due date for US federal agencies to patch
- Record last updated
Affected versions
- Microsoft Microsoft Defender Antimalware Platform
From 4.0.0.0 · fixed in 4.18.26030.3011