— Unscored

Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel Vulnerability

CVE-2026-20079 Exploited

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.

Being exploited in the wild

Catalogued 9 September 2026 · US federal remediation deadline 12 September 2026

Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for…

Exploit code is also public: Metasploit · Public PoC · Nuclei template

Metasploitexploit/linux/http/cisco_fmc_auth_bypass_rce
NucleiCisco Secure Firewall Management Center - Authentication Bypass
Public PoCCyberAuth/CVE-2026-200796 stars
Public PoC0xBlackash/CVE-2026-20079
Public PoCDiegoArias008/CVE-2026-20079-checker

Assessment

CVSS: Not yet scored
Severity: Unscored
Known exploited: Yes — listed in the CISA KEV catalog
Exploit availability: CISA KEV, Metasploit, Public PoC, Nuclei template
Published: 9 September 2026
Last updated: 9 September 2026
Affected: Cisco · Secure Firewall Management Center (FMC) and Security Cloud Control (SCC) Firewall Management
Weakness: CWE-288

At the source

CISA KEV

References

https://www.cisa.gov/known-exploited-vulnerabilities-catalog

Community proofs of concept

No community proof of concept yet. If you have one for a published vulnerability and the right to share it, add it below — it will appear here once reviewed.

Submit a proof of concept

Only for publicly disclosed vulnerabilities, and only material from testing you were authorised to perform. This platform does not buy, sell, or broker exploits — see earning from vulnerability research for legitimate bounty programs. Submissions are reviewed before they appear. Text only; do not include live credentials, personal data, or anything targeting systems you are not permitted to test.

Title *

Proof of concept *

Write-up (optional)

Affected versions (optional)

Name or handle (optional)

References (optional, one URL per line)

Licence for your contribution *

Private contact (optional, never shown)

Before you submit * This vulnerability is already publicly disclosed (it has a published CVE). This material comes only from testing I was authorised to perform. I have the legal right to publish this content and am not breaching any agreement by doing so. It contains no live credentials, personal data, or anything targeting systems I am not authorised to test. I understand it will be reviewed before it appears publicly and may be rejected. I agree to the submission terms.

What is 9 + 4? *

Query this programmatically

Agents can read this through the MCP endpoint, or over HTTP:

curl https://cve.zerocrew.in/api/cve/CVE-2026-20079