Vulnerability · Published Mar 10, 2026 · Assigned by adobe
CVE-2026-27221Acrobat Reader | Improper Certificate Validation (CWE-295)
Medium 5.5
In plain English
A medium-severity improper certificate validation in Acrobat 2024 from Adobe. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.1%top 98.1% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Adobe | Acrobat DC | 0 – through 25.001.21265 |
| Adobe | Acrobat Reader DC | 0 – through 25.001.21265 |
| Adobe | Acrobat 2024 | 0 – through 24.001.30307 (Win), 24.001.30308 (Mac) |
Weakness: CWE-295 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
References
- https://helpx.adobe.com/security/products/acrobat/apsb26-26.html vendor-advisory