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.
Analysis
Analysis and contextual insights are available on OpenCVE Cloud.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Cisco | Cisco Secure Firewall Management Center (FMC) | unknown |
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| Cisco | Secure Firewall Management Center | 88% |
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No vendor fix or workaround currently provided.
Additional remediation guidance may be available on OpenCVE Cloud.
Tracking
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Sat, 19 Sep 2026 23:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Cisco
Cisco secure Firewall Management Center |
|
| Vendors & Products |
Cisco
Cisco secure Firewall Management Center |
Wed, 16 Sep 2026 20:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Cisco Secure Firewall Management Center Software Information Disclosure and Disk Denial of Service Vulnerability | |
| Weaknesses | CWE-306 | |
| References |
| |
| Metrics |
cvssV3_1
|
MITRE
Status: PUBLISHED
Assigner: cisco
Published:
Updated: 2026-09-18T14:46:28.683Z
Reserved: 2025-10-08T11:59:15.413Z
Link: CVE-2026-20343
Vulnrichment
No data.
NVD
Status : Awaiting Analysis
Published: 2026-09-16T21:17:11.850
Modified: 2026-09-18T15:17:07.577
Link: CVE-2026-20343
Redhat
No data.
OpenCVE Enrichment
Updated: 2026-09-19T22:31:21Z
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CWE-306
Missing Authentication for Critical Function