CVE-2021-26100

MEDIUM

FortiMail < 7.0.0 - Unauthenticated Cryptographic Signature Bypass in Identity-Based Encryption

Title source: llm

Description

A missing cryptographic step in the Identity-Based Encryption service of FortiMail before 7.0.0 may allow an unauthenticated attacker who intercepts the encrypted messages to manipulate them in such a way that makes the tampering and the recovery of the plaintexts possible.

References (1)

Core 1

Core References

Vendor Advisory x_refsource_confirm

https://fortiguard.com/advisory/FG-IR-21-003

Scores

CVSS v3 5.9

EPSS 0.0011

EPSS Percentile 28.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-347

Status published

Products (1)

fortinet/fortimail < 7.0.0

Published Jul 09, 2021

Tracked Since Feb 18, 2026