CVE-2021-36187

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

A uncontrolled resource consumption in Fortinet FortiWeb version 6.4.0, version 6.3.15 and below, 6.2.5 and below allows attacker to cause a denial of service for webserver daemon via crafted HTTP 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-400

Affected software

Vendor	Product	Versions
Fortinet	Fortinet FortiWeb	FortiWeb 6.4.0, 6.3.15, 6.3.14, 6.3.13, 6.3.12, 6.3.11, 6.3.10, 6.3.9, 6.3.8, 6.3.7, 6.3.6, 6.3.5, 6.3.4, 6.3.3, 6.3.2, 6.3.1, 6.3.0, 6.2.5, 6.2.4, 6.2.3, 6.2.2, 6.2.1, 6.2.0, 6.1.2, 6.1.1, 6.1.0, 6.0.7, 6.0.6, 6.0.5, 6.0.4, 6.0.3, 6.0.2, 6.0.1, 6.0.0, 5.9.1, 5.9.0, 5.8.7, 5.8.6, 5.8.5, 5.8.3, 5.8.2, 5.8.1, 5.8.0, 5.7.3, 5.7.2, 5.7.1, 5.7.0, 5.6.2, 5.6.1, 5.6.0, 5.5.7, 5.5.6, 5.5.5, 5.5.4, 5.5.3, 5.5.2, 5.5.1, 5.5.0, 5.4.1, 5.4.0, 5.3.9, 5.3.8, 5.3.7, 5.3.6, 5.3.5, 5.3.4, 5.3.3, 5.3.2, 5.3.1, 5.3.0, 5.2.4, 5.2.3, 5.2.2, 5.2.1, 5.2.0, 5.1.4, 5.1.3, 5.1.2, 5.1.1, 5.1.0, 5.0.6, 5.0.5, 5.0.4, 5.0.3, 5.0.2, 5.0.1, 5.0.0, 4.4.7, 4.4.6, 4.4.5, 4.4.4, 4.4.3, 4.4.2, 4.4.1, 4.4.0, 4.3.7, 4.3.6, 4.3.5, 4.3.4, 4.3.3, 4.3.2, 4.3.1, 4.2.4, 4.2.3, 4.2.2, 4.2.0, 4.1.2, 4.1.1, 4.1.0, 4.0.2, 3.0.0

References

https://fortiguard.com/advisory/FG-IR-21-039Vendor Advisory
https://fortiguard.com/advisory/FG-IR-21-039Vendor Advisory

Timeline

Published: Nov 2, 2021
Last modified: Jun 17, 2026
NVD status: Modified

Related CVEs from 2021

CVE-2021-361886.1A improper neutralization of input during web page generation ('cross-site scripting') in Fortinet FortiWeb version 6.4.1 and below, 6.3.15 CVE-2021-361894.9A missing encryption of sensitive data in Fortinet FortiClientEMS version 7.0.1 and below, version 6.4.4 and below allows attacker to inform CVE-2021-36194.8Rapid7 Velociraptor 0.5.9 and prior is vulnerable to a post-authentication persistent cross-site scripting (XSS) issue, where an authenticat CVE-2021-361906.3A unintended proxy or intermediary ('confused deputy') in Fortinet FortiWeb version 6.4.1 and below, 6.3.15 and below allows an unauthentica CVE-2021-361915.4A url redirection to untrusted site ('open redirect') in Fortinet FortiWeb version 6.4.1 and below, 6.3.15 and below allows attacker to use CVE-2021-361923.8An exposure of sensitive information to an unauthorized actor [CWE-200] vulnerability in FortiManager 7.0.1 and below, 6.4.6 and below, 6.2.CVE-2021-361937.2Multiple stack-based buffer overflows in the command line interpreter of FortiWeb before 6.4.2 may allow an authenticated attacker to achiev CVE-2021-361948.8Multiple stack-based buffer overflows in the API controllers of FortiWeb 6.4.1, 6.4.0, and 6.3.0 through 6.3.15 may allow an authenticated a CVE-2021-361958.8Multiple command injection vulnerabilities in the command line interpreter of FortiWeb versions 6.4.1, 6.4.0, 6.3.0 through 6.3.15, 6.2.0 th CVE-2021-361987.5Successful exploitation of this vulnerability could allow an unauthorized user to access sensitive data.CVE-2021-361995.3Running a vulnerability scanner against VideoEdge NVRs can cause some functionality to stop.CVE-2021-36205.5A flaw was found in Ansible Engine's ansible-connection module, where sensitive information such as the Ansible user credentials is disclose