Sensitive-memory disclosure via integer underflow
Published Sep 8, 2026 · Updated Sep 8, 2026
Integer underflow in Adobe Acrobat and Reader allows context-dependent attackers to expose sensitive memory through a crafted PDF. Adobe identifies an integer underflow in its PDF-processing application but does not disclose the affected component or arithmetic operation that wraps on crafted input. Exploitation requires a victim to open the malicious file; the documented consequence is memory exposure without integrity or availability impact.
Summary
What happened
Integer underflow in Adobe Acrobat and Reader allows context-dependent attackers to expose sensitive memory through a crafted PDF. Adobe identifies an integer underflow in its PDF-processing application but does not disclose the affected component or arithmetic operation that wraps on crafted input. Exploitation requires a victim to open the malicious file; the documented consequence is memory exposure without integrity or availability impact.
The record
- CVE
- CVE-2026-81977
- Published
- Sep 8, 2026
- Updated
- Sep 8, 2026
- Vendor
- Adobe
- Product
- Adobe Acrobat Pro 2024
- Classifications
- CWE-191, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 8, 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?
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- Affected versionversion=0 <=24.001.30383
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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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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