Improper verification of cryptographic signature in Adobe Reader and Adobe Acrobat - CVE-2026-27221
Published: March 10, 2026
Vulnerability identifier: #VU123752
CSH Severity: Medium
CVSS v4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-27221
CWE-ID: CWE-347
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to improper verification of cryptographic signature. A remote attacker can trick the victim into opening a specially crafted PDF file and spoof its content.
Affected software
Adobe Reader
Adobe Acrobat
Adobe Acrobat
How to mitigate CVE-2026-27221
Install updates from vendor's website.
Adobe Reader - update to 25.001.21288
Adobe Acrobat - addressed in versions 24.001.30356, 25.001.21288
Adobe Acrobat - addressed in versions 24.001.30356, 25.001.21288