Network denial of service via buffer over-read
Published Feb 10, 2026 · Updated Feb 10, 2026
Buffer over-read in Windows GDI+ across affected Windows releases allows remote attackers to interrupt service over a network. Microsoft identifies the defect as an out-of-bounds read but has not disclosed the parsing routine or input format that reads beyond the buffer. Unauthenticated network access and no user interaction are required; the reported impact is a service interruption without data disclosure or modification.
Summary
What happened
Buffer over-read in Windows GDI+ across affected Windows releases allows remote attackers to interrupt service over a network. Microsoft identifies the defect as an out-of-bounds read but has not disclosed the parsing routine or input format that reads beyond the buffer. Unauthenticated network access and no user interaction are required; the reported impact is a service interruption without data disclosure or modification.
The record
- CVE
- CVE-2026-20846
- Published
- Feb 10, 2026
- Updated
- Feb 10, 2026
- Vendor
- Microsoft
- Product
- Windows Server 2019
- Classifications
- CWE-126, T1499
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Feb 10, 2026CVE publishedPublication date reported by the CVE source.
- Feb 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=10.0.17763.0 <10.0.17763.8389
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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