CVSS base score: 10.0 (Critical) vendor CNA · v3.1
Score assigned by the vendor's own CVE Numbering Authority (CNA); CISA's Vulnrichment program adds a score only when the CNA omits one.
Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel Vulnerability
Vendor: Cisco Product: Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management
Cisco Secure Firewall Management Center (FMC) Software and Cisco Security Cloud Control (SCC) Firewall Management contain an authentication Bypass using an alternate path or channel vulnerability that could allow an unauthenticated, remote attacker to bypass authentication and execute script files on an affected device to obtain root access to the underlying operating system.
Each milestone comes from a different source, so gaps between them are gaps in what those sources publish, not evidence that nothing happened. EPSS history for this CVE holds 13 points from 2026-09-10, tracked daily from 2026-09-10; earlier points are weekly, which dates a spike to within a week. Peak probability 75.8% on 2026-09-11.
Check whether a specific version is affected →
What each source publishes about which product versions carry this vulnerability, kept as written rather than merged. Absence here means no source has published applicability data, not that nothing is affected.
| Date | Source | Article |
|---|---|---|
| 2026-09-11 | The Hacker News | Cisco FMC Flaws Exploited to Steal Credentials and Deploy Qilin Ransomware |
| 2026-09-10 | The Hacker News | CISA Flags Exploited Cisco, Citrix, Fortinet Flaws, Sets Sept. 12 Federal Patch Deadline |
| 2026-09-09 | BleepingComputer | Cisco confirms CVE-2026-20079 Secure FMC flaw exploited in attacks |
Articles from monitored vendor research blogs and security news feeds that specifically mention this CVE. Coverage begins when feed monitoring started; earlier articles are not indexed.
Coverage across public collections only: Nuclei and OpenVAS NVT (scan);
Snort and Suricata ET Open (network); Sigma and YARA (host/SIEM);
Metasploit, Exploit-DB and public GitHub repositories (exploit). Absence
here means nothing public was found, not that detection is impossible.
GitHub PoC repositories are collected automatically by
PoC-in-GitHub (CC0) and are not vetted:
some are fakes and some are malware. Treat them as evidence that code was
published, not as code to run.
OpenVAS coverage derives from the Greenbone Community Feed, made available
under the Open Database License (ODbL) v1.0;
its individual Vulnerability Tests are licensed
GNU GPL v2.
Defensive techniques inferred by MITRE D3FEND from the underlying weakness (CWE-288) — general hardening and detection guidance for this weakness class, not a vendor patch for this specific CVE.
| Source | Date | Record |
|---|---|---|
| CISA Vulnrichment | 2026-03-05 | source record → |
| CISA KEV | 2026-09-09 | source record → |
| Date | Advisory | Issuer |
|---|---|---|
| 2026-09-09 | CISA Adds Four Known Exploited Vulnerabilities to Catalog | CISA |
No exploit-tool sightings recorded for this CVE.
Evidence tiers are explained on the About page — a merged Metasploit module is far stronger evidence than a distro package mention.
CVE.org record → NVD entry → CISA KEV catalog → FortiGuard Labs → Rapid7 AttackerKB →