Adobe Acrobat and Reader Heap-based Buffer Overflow Vulnerability (CVE-2021-21017)
Severity: high · Patch status: patched · Since 2021-11-03 · CVE-2021-21017
Acrobat Acrobat and Reader contain a heap-based buffer overflow vulnerability that could allow an unauthenticated attacker to achieve code execution in the context of the current user. CISA added CVE-2021-21017 to its Known Exploited Vulnerabilities catalog on Nov 3, 2021, which means attackers are exploiting it in the wild.
What to do
- Apply updates per vendor instructions.
- US federal agencies must remediate by Nov 17, 2021 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
