Vulnerability in Adobe Acrobat
CVE-2026-27221
Acrobat Reader versions 24.001.30307, 24.001.30308, 25.001.21265 and earlier are affected by an Improper Certificate Validation vulnerability that could result in a Security feature bypass. An attacker could leverage this vulnerability to spoof the identity of a signer. Exploitation of this issue requires user interaction.
Vulnerability class: Improper Certificate Validation
EPSS: 0.001 (1.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
Affected products
Weakness classification (CWE)
References
- psirt@adobe.com (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-27221?
- CVE-2026-27221 is a medium-severity vulnerability in Adobe Acrobat, classified under Improper Certificate Validation. CVSS score: 5.5/10. Published 2026-03-10.
- How severe is CVE-2026-27221?
- Medium severity. CVSS v3 base score is 5.5 out of 10.