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MEDIUM · 5.5

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 attacke...

Vulnerability 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.

CVSS Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
NONE

Affected Products

VendorProductVersions
AdobeAcrobat Dc< 25.001.21288
AppleMacos-
MicrosoftWindows-
AdobeAcrobat Reader Dc< 25.001.21288
AdobeAcrobat>= 24.001.20604, < 24.001.30356

Related Weaknesses (CWE)

CWE-295

References

FAQ

What is CVE-2026-27221?

CVE-2026-27221 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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 attacke...

How severe is CVE-2026-27221?

CVE-2026-27221 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-27221?

Check the references section above for vendor advisories and patch information. Affected products include: Adobe Acrobat Dc, Apple Macos, Microsoft Windows, Adobe Acrobat Reader Dc, Adobe Acrobat.