Limited unauthorized write via signature verification bypass
Published Dec 9, 2025 · Updated Apr 28, 2026
Improper signature verification in Adobe Acrobat Reader 25.001.20982 and earlier allows attackers limited unauthorized write access. Adobe has not published which signature-validation routine accepts or mishandles the cryptographic signature, or the precise verification error. Exploitation requires user interaction with a cryptographic signature; no information disclosure or service interruption is documented.
Summary
What happened
Improper signature verification in Adobe Acrobat Reader 25.001.20982 and earlier allows attackers limited unauthorized write access. Adobe has not published which signature-validation routine accepts or mishandles the cryptographic signature, or the precise verification error. Exploitation requires user interaction with a cryptographic signature; no information disclosure or service interruption is documented.
The record
- CVE
- CVE-2025-64786
- Published
- Dec 9, 2025
- Updated
- Apr 28, 2026
- Vendor
- Adobe
- Product
- Adobe Acrobat Reader
- Classifications
- CWE-347
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 9, 2025CVE publishedPublication date reported by the CVE source.
- Apr 28, 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 <=20.005.30803
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.
Weakness, pattern, technique
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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