- High 8.6
- Known exploited (CISA KEV)
CVE-2026-34621
Acrobat Reader versions 24.001.30356, 26.001.21367 and earlier are affected by an Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.
Scores
The facts
- Published
- 11 April 2026
- Last changed
- 28 August 2026
- NVD status
- Analyzed
- Severity
- High, CVSS 8.6 out of 10 (version 3.1)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H - Weakness
- Affects
- adobe acrobat dc
- adobe acrobat reader dc
- adobe acrobat
- Known exploited
- Yes. CISA added it to the Known Exploited Vulnerabilities catalogue on 13 April 2026.
- EPSS
- 2.2% chance of exploitation activity in the next 30 days (percentile 82).
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