CVE-2026-20343
Last modified
CVE-2026-20343 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. A vulnerability in a critical API for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to download sensitive files and use unbounded disk space. This vulnerability exists because a critical API lacks authentication. An attacker could exploit this vulnerability by repeatedly invoking the API. A successful exploit could allow the attacker to download sensitive files that should be restricted and consume disk space so the device could become unresponsive, causing a DoS condition..
Description
A vulnerability in a critical API for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to download sensitive files and use unbounded disk space. This vulnerability exists because a critical API lacks authentication. An attacker could exploit this vulnerability by repeatedly invoking the API. A successful exploit could allow the attacker to download sensitive files that should be restricted and consume disk space so the device could become unresponsive, causing a DoS condition.
Metrics
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Cisco Secure Firewall Management Center (FMC) | 7.3.0; 7.3.1; 7.3.1.1; 7.4.0; 7.4.1; 7.4.1.1; 7.3.1.2; 7.6.0; 7.4.2; 7.4.2.1; 7.7.0; 7.4.2.2; 7.6.1; 7.4.2.3; 7.6.2; 7.7.10; 7.6.2.1; 7.7.10.1; 7.4.2.4; 7.4.3; 7.6.3; 7.7.11; 7.6.4; 10.0.0; 7.4.4; 7.4.5; 7.7.12; 7.6.5; 7.4.6; 10.0.1; 7.4.7 |
References
Timeline
- Published
- Last Modified
- Status
- Awaiting Analysis
Frequently Asked Questions
What is CVE-2026-20343?
How severe is CVE-2026-20343?
How do I fix CVE-2026-20343?
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-2026-20338A vulnerability in the zip archive parser of ClamAV could al…7.5
- CVE-2026-20339A vulnerability in the PESpin file format parser of ClamAV c…7.5
- CVE-2026-2034Sante DICOM Viewer Pro DCM File Parsing Buffer Overflow Remo…7.8
- CVE-2026-20340A vulnerability in Cisco Secure FMC Software could allow an …8.8
- CVE-2026-20341A vulnerability in the sftunnel inter-device communication p…9.1
- CVE-2026-20342A vulnerability in a specific file download API of Cisco Sec…7.7
- CVE-2026-20344A vulnerability in the web-based management interface of Cis…8.8
- CVE-2026-20345A vulnerability in the GPT file format parser of ClamAV coul…7.5
- CVE-2026-20346A vulnerability in the PDF file format parser of ClamAV coul…7.5
- CVE-2026-20347A vulnerability in the Mach-O file format parser of ClamAV c…7.5
- CVE-2026-20348A vulnerability in the XAR file format parser of ClamAV coul…7.5
- CVE-2026-20349A vulnerability in the Remote Access SSL VPN service for Cis…8.6
Are you affected by CVE-2026-20343?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST