CVE-2026-34621 · netVigilance record NV26-0082
Adobe Acrobat and Reader Prototype Pollution
past due
What to do
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 deadline 2026-04-27 · passed 4 months ago · applies to US federal civilian agencies; used elsewhere as a reference SLA
What happened
Adobe Acrobat and Reader contain a prototype pollution vulnerability that allows for arbitrary code execution.
Who is affected
Adobe Acrobat and Reader. Affected version ranges are listed in the vendor advisory and the NVD entry linked under Sources.
Weakness class: CWE-1321.
Timeline
- Added to CISA KEVExploitation in the wild confirmed by CISA
- CISA remediation deadlinepassed 4 months ago
Sources
- NVD entry for CVE-2026-34621 nvd.nist.gov/vuln/detail/CVE-2026-34621
- CISA Known Exploited Vulnerabilities catalog www.cisa.gov/known-exploited-vulnerabilities-catalog
- helpx.adobe.com helpx.adobe.com/security/products/acrobat/apsb26-43.html
- nvd.nist.gov nvd.nist.gov/vuln/detail/CVE-2026-34621