Information disclosure via unchecked EMF rectangle count
Published Mar 17, 2026 · Updated Mar 17, 2026
Out-of-bounds read in Affinity before 3.1.0 allows attackers to disclose process memory by opening a crafted EMF file. The EMR_EXTSELECTCLIPRGN parser trusts CountRects when calculating the RegionData span, allowing the computed length to exceed RgnDataSize and read past the record. Exploitation requires a user to open the file on Windows; the read exposes memory and can interrupt the application, but it does not alter data.
Summary
What happened
Out-of-bounds read in Affinity before 3.1.0 allows attackers to disclose process memory by opening a crafted EMF file. The EMR_EXTSELECTCLIPRGN parser trusts CountRects when calculating the RegionData span, allowing the computed length to exceed RgnDataSize and read past the record. Exploitation requires a user to open the file on Windows; the read exposes memory and can interrupt the application, but it does not alter data.
The record
- CVE
- CVE-2025-66042
- Published
- Mar 17, 2026
- Updated
- Mar 17, 2026
- Vendor
- Pexels
- Product
- Affinity
- Classifications
- CWE-125, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 17, 2026CVE publishedPublication date reported by the CVE source.
- Mar 17, 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=0 <3.1.0 (March 26)
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
- TALOS-2025-2319 crafted EMF demonstrationproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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