CVE-2016-6909

Name: CVE-2016-6909
Creator: NVD / NIST
Published: 2016-08-24T16:30:00.137+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 49.86%

Last modified Jun 17, 2026

CVE-2016-6909 is a vulnerability of currently unknown severity. Buffer overflow in the Cookie parser in Fortinet FortiOS 4.x before 4.1.11, 4.2.x before 4.2.13, and 4.3.x before 4.3.9 and FortiSwitch before 3.4.3 allows remote attackers to execute arbitrary code via a crafted HTTP request, aka EGREGIOUSBLUNDER.. EPSS estimates a 49.86% chance of exploitation in the next 30 days.

Description

Buffer overflow in the Cookie parser in Fortinet FortiOS 4.x before 4.1.11, 4.2.x before 4.2.13, and 4.3.x before 4.3.9 and FortiSwitch before 3.4.3 allows remote attackers to execute arbitrary code via a crafted HTTP request, aka EGREGIOUSBLUNDER.

Metrics

EPSS Probability

49.86%

98.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Fortinet	Fortios	>= 4.1.0, < 4.1.11
Fortinet	Fortios	>= 4.2.0, < 4.2.13
Fortinet	Fortios	>= 4.3.0, < 4.3.9
Fortinet	Fortiswitch	<= 3.4.2

References

http://fortiguard.com/advisory/FG-IR-16-023Vendor Advisory
http://packetstormsecurity.com/files/138387/EGREGIOUSBLUNDER-Fortigate-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/92523Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1036643Third Party Advisory, VDB Entry
https://musalbas.com/2016/08/16/equation-group-firewall-operations-catalogue.htmlThird Party Advisory
https://www.exploit-db.com/exploits/40276/Exploit, Third Party Advisory, VDB Entry
http://fortiguard.com/advisory/FG-IR-16-023Vendor Advisory
http://packetstormsecurity.com/files/138387/EGREGIOUSBLUNDER-Fortigate-Remote-Code-Execution.htmlExploit, Third Party Advisory, VDB Entry
http://www.securityfocus.com/bid/92523Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1036643Third Party Advisory, VDB Entry
https://musalbas.com/2016/08/16/equation-group-firewall-operations-catalogue.htmlThird Party Advisory
https://www.exploit-db.com/exploits/40276/Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Aug 24, 2016
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-6909?

How severe is CVE-2016-6909?

Severity scoring for CVE-2016-6909 is pending analysis. The EPSS model estimates a 49.86% probability of exploitation in the next 30 days.

How do I fix CVE-2016-6909?

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.

Are you affected by CVE-2016-6909?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST