CVE-2021-41027
HIGHCVSS 7.8/10EPSS 0.16%
Last modified
CVE-2021-41027 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. A stack-based buffer overflow in Fortinet FortiWeb version 6.4.1 and 6.4.0, allows an authenticated attacker to execute unauthorized code or commands via crafted certificates loaded into the device.. EPSS estimates a 0.16% chance of exploitation in the next 30 days.
Description
A stack-based buffer overflow in Fortinet FortiWeb version 6.4.1 and 6.4.0, allows an authenticated attacker to execute unauthorized code or commands via crafted certificates loaded into the device.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | Fortiweb | 6.4.0 |
| Fortinet | Fortiweb | 6.4.1 |
References
- https://fortiguard.com/advisory/FG-IR-21-134Patch, Vendor Advisory
- https://fortiguard.com/advisory/FG-IR-21-134Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-41027?
A stack-based buffer overflow in Fortinet FortiWeb version 6.4.1 and 6.4.0, allows an authenticated attacker to execute unauthorized code or commands via crafted certificates loaded into the device.
How severe is CVE-2021-41027?
CVE-2021-41027 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.16% probability of exploitation in the next 30 days.
How do I fix CVE-2021-41027?
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-2021-41021A privilege escalation vulnerability in FortiNAC versions 8.…6.7
- CVE-2021-41022A improper privilege management in Fortinet FortiSIEM Window…7.8
- CVE-2021-41023A unprotected storage of credentials in Fortinet FortiSIEM W…5.5
- CVE-2021-41024A relative path traversal [CWE-23] vulnerabiltiy in FortiOS …7.5
- CVE-2021-41025Multiple vulnerabilities in the authentication mechanism of …9.8
- CVE-2021-41026A relative path traversal in FortiWeb versions 6.4.1, 6.4.0,…6.5
- CVE-2021-41028A combination of a use of hard-coded cryptographic key vulne…7.5
- CVE-2021-41029A improper neutralization of input during web page generatio…5.4
- CVE-2021-4103Cross-site Scripting (XSS) - Stored in GitHub repository van…5.4
- CVE-2021-41030An authentication bypass by capture-replay vulnerability [CW…9.1
- CVE-2021-41031A relative path traversal vulnerability [CWE-23] in FortiCli…7.8
- CVE-2021-41032An improper access control vulnerability [CWE-284] in FortiO…5.4
Are you affected by CVE-2021-41027?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST