CVE-2021-36173
Last modified
CVE-2021-36173 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A heap-based buffer overflow in the firmware signature verification function of FortiOS versions 7.0.1, 7.0.0, 6.4.0 through 6.4.6, 6.2.0 through 6.2.9, and 6.0.0 through 6.0.13 may allow an attacker to execute arbitrary code via specially crafted installation images.. EPSS estimates a 1.44% chance of exploitation in the next 30 days.
Description
A heap-based buffer overflow in the firmware signature verification function of FortiOS versions 7.0.1, 7.0.0, 6.4.0 through 6.4.6, 6.2.0 through 6.2.9, and 6.0.0 through 6.0.13 may allow an attacker to execute arbitrary code via specially crafted installation images.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | Fortios | >= 6.0.0, <= 6.0.13 |
| Fortinet | Fortios | >= 6.2.0, <= 6.2.9 |
| Fortinet | Fortios | >= 6.4.0, <= 6.4.6 |
| Fortinet | Fortios | 7.0.0 |
| Fortinet | Fortios | 7.0.1 |
References
- https://fortiguard.com/advisory/FG-IR-21-115Patch, Vendor Advisory
- https://fortiguard.com/advisory/FG-IR-21-115Patch, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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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.
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