CVE-2021-36187
HIGHCVSS 7.5/10EPSS 1.38%
Last modified
CVE-2021-36187 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 1.38% chance of exploitation in the next 30 days.
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/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | Fortiweb | >= 6.2.0, <= 6.2.5 |
| Fortinet | Fortiweb | >= 6.3.0, <= 6.3.15 |
| Fortinet | Fortiweb | 6.4.0 |
References
- https://fortiguard.com/advisory/FG-IR-21-039Vendor Advisory
- https://fortiguard.com/advisory/FG-IR-21-039Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-36187?
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
How severe is CVE-2021-36187?
CVE-2021-36187 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.38% probability of exploitation in the next 30 days.
How do I fix CVE-2021-36187?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2021
- CVE-2021-36181A concurrent execution using shared resource with improper S…3.1
- CVE-2021-36182A Improper neutralization of special elements used in a comm…8.8
- CVE-2021-36183An improper authorization vulnerability [CWE-285] in FortiCl…7.8
- CVE-2021-36184A improper neutralization of Special Elements used in an SQL…6.5
- CVE-2021-36185A improper neutralization of special elements used in an OS …8.8
- CVE-2021-36186A stack-based buffer overflow in Fortinet FortiWeb version 6…9.8
- CVE-2021-36188A improper neutralization of input during web page generatio…6.1
- CVE-2021-36189A missing encryption of sensitive data in Fortinet FortiClie…4.9
- CVE-2021-3619Rapid7 Velociraptor 0.5.9 and prior is vulnerable to a post-…4.8
- CVE-2021-36190A unintended proxy or intermediary ('confused deputy') in Fo…6.3
- CVE-2021-36191A url redirection to untrusted site ('open redirect') in For…5.4
- CVE-2021-36192An exposure of sensitive information to an unauthorized acto…3.8
Are you affected by CVE-2021-36187?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST