CRITICAL
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
Published Aug 24, 2016
9.8
CRITICALCVSS 3.0
EPSS 49.86%
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
9.8 CRITICAL NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality Impact High
Integrity Impact High
Availability Impact High
10.0 HIGH NVD
AV:N/AC:L/Au:N/C:C/I:C/A:C
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
49.86% 0.49856
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.49856
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (19 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 49.86% (0.49856) | 98.87th | v5 (v2026.06.15) |
| Sep 22, 2026 | 49.86% (0.49856) | 98.84th | v5 (v2026.06.15) |
| Sep 21, 2026 | 36.15% (0.36151) | 98.45th | v5 (v2026.06.15) |
| Sep 6, 2026 | 49.86% (0.49856) | 98.82th | v5 (v2026.06.15) |
| Sep 5, 2026 | 36.15% (0.36151) | 98.42th | v5 (v2026.06.15) |
| Aug 30, 2026 | 49.86% (0.49856) | 98.81th | v5 (v2026.06.15) |
| Aug 28, 2026 | 36.15% (0.36151) | 98.41th | v5 (v2026.06.15) |
| Aug 24, 2026 | 49.86% (0.49856) | 98.81th | v5 (v2026.06.15) |
| Aug 23, 2026 | 36.15% (0.36151) | 98.40th | v5 (v2026.06.15) |
| Jun 15, 2026 | 49.86% (0.49856) | 98.75th | v5 (v2026.06.15) |
| Mar 28, 2026 | 63.41% (0.63409) | 98.39th | v4 (v2025.03.14) |
| Jun 19, 2025 | 71.56% (0.71560) | 98.63th | v4 (v2025.03.14) |
| Mar 17, 2025 | 73.56% (0.73564) | 98.73th | v4 (v2025.03.14) |
| Dec 17, 2024 | 87.47% (0.87473) | 98.89th | v3 (v2023.03.01) |
| Oct 17, 2023 | 96.19% (0.96190) | 99.33th | v3 (v2023.03.01) |
| Mar 7, 2023 | 96.32% (0.96324) | 99.19th | v3 (v2023.03.01) |
| Mar 6, 2023 | 18.61% (0.18609) | 96.35th | v2 (v2022.01.01) |
| Apr 1, 2022 | 18.61% (0.18609) | 96.02th | v2 (v2022.01.01) |
| Feb 4, 2022 | 18.61% (0.18609) | 93.65th | v2 (v2022.01.01) |
Weaknesses (1)
References (6)
- http://fortiguard.com/advisory/FG-IR-16-023 x_refsource_CONFIRMVendor Advisory
- http://packetstormsecurity.com/files/138387/EGREGIOUSBLUNDER-Fortigate-Remote-Code-Execution.html x_refsource_MISCExploitThird Party AdvisoryVDB Entry
- http://www.securityfocus.com/bid/92523 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1036643 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://musalbas.com/2016/08/16/equation-group-firewall-operations-catalogue.html x_refsource_MISCThird Party Advisory
- https://www.exploit-db.com/exploits/40276/ exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry
| Link | Providers | Tags |
|---|---|---|
| http://fortiguard.com/advisory/FG-IR-16-023 | x_refsource_CONFIRMVendor Advisory | |
| http://packetstormsecurity.com/files/138387/EGREGIOUSBLUNDER-Fortigate-Remote-Code-Execution.html | x_refsource_MISCExploitThird Party AdvisoryVDB Entry | |
| http://www.securityfocus.com/bid/92523 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1036643 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://musalbas.com/2016/08/16/equation-group-firewall-operations-catalogue.html | x_refsource_MISCThird Party Advisory | |
| https://www.exploit-db.com/exploits/40276/ | exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner mitre
Published Aug 24, 2016
Updated Aug 6, 2024
Reserved Aug 22, 2016
Link CVE-2016-6909
CISA Vulnrichment
Updated n/a