VULNERABILITY INTELLIGENCE

CVE-2021-24020

CVSS score7.5 HIGH
EPSS probability0.62%
CISA KEVNot currently listed
Published2021-07-09
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

A missing cryptographic step in the implementation of the hash digest algorithm in FortiMail 6.4.0 through 6.4.4, and 6.2.0 through 6.2.7 may allow an unauthenticated attacker to tamper with signed URLs by appending further data which allows bypass of signature verification.

Weakness classification

  • CWE-347: Improper Verification of Cryptographic Signature

Primary references