Oct 19, 2026 · 15:05 UTC SEARCH
UNRATED KNOWN EXPLOITED
Vulnerability intelligence

CVE-2026-34621

VendorAdobe
ProductAcrobat and Reader
Known exploitedYes
Added to CISA KEVApril 13, 2026
KEV due dateApril 27, 2026
Known ransomware useNot identified by CISA

Adobe Acrobat and Reader contain a prototype pollution vulnerability that allows for arbitrary code execution.

Required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

CISA KEV status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities Catalog. Known ransomware campaign use: Unknown.

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