CVE-2026-126253
Last modified
CVE-2026-126253 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. A authentication bypass by primary weakness vulnerability in Fortinet FortiOS 8.0.0 through 8.0.1, FortiOS 7.6.0 through 7.6.7, FortiOS 7.4.0 through 7.4.12, FortiOS 7.2.0 through 7.2.13 may allow an unauthenticated attacker to broadcast LSA via specially crafted request. EPSS estimates a 0.37% chance of exploitation in the next 30 days.
Description
A authentication bypass by primary weakness vulnerability in Fortinet FortiOS 8.0.0 through 8.0.1, FortiOS 7.6.0 through 7.6.7, FortiOS 7.4.0 through 7.4.12, FortiOS 7.2.0 through 7.2.13 may allow an unauthenticated attacker to broadcast LSA via specially crafted request
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | FortiOS | >= 8.0.0, <= 8.0.1; >= 7.6.0, <= 7.6.7; >= 7.4.0, <= 7.4.12; >= 7.2.0, <= 7.2.13; >= 7.0.1, <= 7.0.19 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-126253?
How severe is CVE-2026-126253?
How do I fix CVE-2026-126253?
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 2026
- CVE-2026-126247A use of externally-controlled format string vulnerability i…7.2
- CVE-2026-126248A insufficiently protected credentials vulnerability in Fort…7.5
- CVE-2026-126249A improper privilege management vulnerability in Fortinet Fo…7.2
- CVE-2026-126250A incorrect authorization vulnerability in Fortinet FortiAut…8.2
- CVE-2026-126251A incorrect authorization vulnerability in Fortinet FortiAut…9.1
- CVE-2026-126252A improper neutralization of special elements used in an sql…8.3
- CVE-2026-126254A numeric truncation error vulnerability in Fortinet FortiOS…9.6
- CVE-2026-126255A path traversal: '../filedir' vulnerability in Fortinet For…7.4
- CVE-2026-126256A out-of-bounds read vulnerability in Fortinet FortiOS 8.0.0…7.4
- CVE-2026-126257A use of hard-coded password vulnerability in Fortinet Forti…9
- CVE-2026-126258A stack-based buffer overflow vulnerability in Fortinet Fort…7.5
- CVE-2026-126259A missing authentication for critical function vulnerability…9.8
Are you affected by CVE-2026-126253?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST