Improper verification of cryptographic signature in Adobe Acrobat and Adobe Reader - CVE-2026-27221
Published: March 10, 2026
Vulnerability identifier: #VU123752
CSH Severity: Medium
CVSS v4.0: 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/E:U/U:Green
CVE-ID: CVE-2026-27221
CWE-ID: CWE-347
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Adobe
Affected software:
Adobe Acrobat
Adobe Reader
Adobe Acrobat
Adobe Reader
Detailed vulnerability description
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.
How to mitigate CVE-2026-27221
Install updates from vendor's website.