CVE-2021-26090

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

A missing release of memory after its effective lifetime vulnerability in the Webmail of FortiMail 6.4.0 through 6.4.4 and 6.2.0 through 6.2.6 may allow an unauthenticated remote attacker to exhaust available memory via specifically crafted login requests.

Metrics

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

Weakness enumeration

CWE-401

Affected software

Vendor	Product	Versions
Fortinet	Fortinet FortiMail	FortiMail 6.4.0 through 6.4.4 and 6.2.0 through 6.2.6

References

https://fortiguard.com/advisory/FG-IR-21-042Vendor Advisory
https://fortiguard.com/advisory/FG-IR-21-042Vendor Advisory

Timeline

Published: Jul 12, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-260917.5A use of a cryptographically weak pseudo-random number generator vulnerability in the authenticator of the Identity Based Encryption service CVE-2021-260926.1Failure to sanitize input in the SSL VPN web portal of FortiOS 5.2.10 through 5.2.15, 5.4.0 through 5.4.13, 5.6.0 through 5.6.14, 6.0.0 thro CVE-2021-260936.5An access of uninitialized pointer (CWE-824) vulnerability in FortiWLC versions 8.6.0, 8.5.3 and earlier may allow a local and authenticated CVE-2021-260958.8The combination of various cryptographic issues in the session management of FortiMail 6.4.0 through 6.4.4 and 6.2.0 through 6.2.6, includin CVE-2021-260968.8Multiple instances of heap-based buffer overflow in the command shell of FortiSandbox before 4.0.0 may allow an authenticated attacker to ma CVE-2021-260978.8An improper neutralization of special elements used in an OS Command vulnerability in FortiSandbox 3.2.0 through 3.2.2, 3.1.0 through 3.1.4,CVE-2021-260987.5An instance of small space of random values in the RPC API of FortiSandbox before 4.0.0 may allow an attacker in possession of a few informa CVE-2021-260994.9Missing cryptographic steps in the Identity-Based Encryption service of FortiMail before 7.0.0 may allow an attacker who comes in possession CVE-2021-261007.5A missing cryptographic step in the Identity-Based Encryption service of FortiMail before 7.0.0 may allow an unauthenticated attacker who in 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