MSRXVulnerabilities / CVE-2026-34621
CVE-2026-34621
Published 2026-04-11 · published (not yet in NVD)
CVE-2026-34621
Acrobat Reader | Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (CWE-1321)
Exploited in the wild: CISA added it to the Known Exploited Vulnerabilities catalog on 2026-04-13, with a fix-by date of 2026-04-27. Patch it first.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
8.6 HIGH
CVSS 3.1 · CNA
CVSS 3.1 · CNA
7.2%
chance of exploitation in the next 30 days (EPSS; higher than 94% of CVEs)
chance of exploitation in the next 30 days (EPSS; higher than 94% of CVEs)
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
Affected products
- Adobe Acrobat DC: 0 to ≤ 26.001.21367
- Adobe Acrobat Reader DC: 0 to ≤ 26.001.21367
- Adobe Acrobat 2024: 0 to ≤ 24.001.30356
Weakness: CWE-1321
1 references (advisories, patches, write-ups)
- https://helpx.adobe.com/security/products/acrobat/apsb26-43.html · vendor-advisory
Sources: CVE.org, FIRST EPSS. Missing ones did not answer or have no record yet.