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CVE-2026-27221

MEDIUM CVSS 3.1: 5.5 EPSS 0.02%
Updated Mar 10, 2026
Acrobat Reader
Parameter Value
CVSS 5.5 (MEDIUM)
Type CWE-295 (Improper Certificate Validation)
Vendor Acrobat Reader
Public PoC No

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.

Attack Parameters

Attack Vector
Local
Requires local access
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
Required
User action required

Impact Assessment

Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
None
No disruption

CVSS Vector v3.1