CVE-2023-21608
Published: October 10, 2023
Official Description
Adobe Acrobat and Reader contains a use-after-free vulnerability that allows for code execution in the context of the current user.
CISA KEV Advisory
Adobe Acrobat and Reader Use-After-Free Vulnerability
Adobe Acrobat and Reader contains a use-after-free vulnerability that allows for code execution in the context of the current user.
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Risk Analysis
Adobe Acrobat and Reader are susceptible to a use-after-free vulnerability, which can lead to arbitrary code execution in the context of the current user. With an EPSS score of 0.84072 and inclusion in CISA's KEV, this flaw poses a critical risk of exploitation.
This vulnerability is actively being exploited in the wild, confirming its use by attackers. Exploitation typically occurs when a user opens a malicious PDF document.
Users should update Adobe Acrobat and Reader to the latest patched versions. Avoid opening PDF files from untrusted sources and enable enhanced security features within the applications.
Technical Analysis
CVE-2023-21608 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CISA has added CVE-2023-21608 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.
Affected Vendors & Products
Exploit & PoC Resources
All References (2)
Quick Facts
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-21608 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
- !CISA KEV: Federal agencies must patch per BOD 22-01 timeline
- !Active exploitation confirmed — treat as P1