CVE-2021-28550
Actively exploited. CVE-2021-28550 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2021-11-03) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Adobe Acrobat and Reader contains a use-after-free vulnerability that could allow an unauthenticated attacker to achieve code execution in the context of the current user.
CSIRTS triage
- What
- A use-after-free vulnerability could allow unauthenticated attackers to execute code.
- Who is affected
- Users of Adobe Acrobat and Reader.
- Urgency
- Remediation is urgent due to active exploitation and critical severity.
- Action
- Update to the latest version of Adobe Acrobat and Reader.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 99% of all EPSS-scored CVEs.
Advisory coverage (1)
- criticalexploitedCVE-2021-28550: Adobe Acrobat and Reader Use-After-Free Vulnerabilitycisa-kev · 2021-11-03
External references
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