CVE-2021-26100

HighCVSS 7.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-347

Affected software

Vendor	Product	Versions
Fortinet	Fortinet FortiMail	FortiMail before 7.0.0

References

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

Timeline

Published: Jul 9, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-261029.1A relative path traversal vulnerability (CWE-23) in FortiWAN version 4.5.7 and below, 4.4 all versions may allow a remote non-authenticated CVE-2021-261038.8An insufficient verification of data authenticity vulnerability (CWE-345) in the user interface of FortiProxy verison 2.0.3 and below, 1.2.1 CVE-2021-261047.8Multiple OS command injection (CWE-78) vulnerabilities in the command line interface of FortiManager 6.2.7 and below, 6.4.5 and below and al CVE-2021-261058.8A stack-based buffer overflow vulnerability (CWE-121) in the profile parser of FortiSandbox version 3.2.2 and below, version 3.1.4 and below CVE-2021-261067.8An improper neutralization of special elements used in an OS Command vulnerability in FortiAP's console 6.4.1 through 6.4.5 and 6.2.4 throug CVE-2021-261074.3An improper access control vulnerability [CWE-284] in FortiManager versions 6.4.4 and 6.4.5 may allow an authenticated attacker with a restr CVE-2021-261087.5A use of hard-coded cryptographic key vulnerability in the SSLVPN of FortiOS before 7.0.1 may allow an attacker to retrieve the key by rever CVE-2021-261099.8An integer overflow or wraparound vulnerability in the memory allocator of SSLVPN in FortiOS before 7.0.1 may allow an unauthenticated attac CVE-2021-261107.8An improper access control vulnerability [CWE-284] in FortiOS autod daemon 7.0.0, 6.4.6 and below, 6.2.9 and below, 6.0.12 and below and For CVE-2021-261116.5A missing release of memory after effective lifetime vulnerability in FortiSwitch 6.4.0 to 6.4.6, 6.2.0 to 6.2.6, 6.0.0 to 6.0.6, 3.6.11 and CVE-2021-261129.8Multiple stack-based buffer overflow vulnerabilities [CWE-121] both in network daemons and in the command line interpreter of FortiWAN befor CVE-2021-261137.5A use of a one-way hash with a predictable salt vulnerability [CWE-760] in FortiWAN before 4.5.9 may allow an attacker who has previously co