CVE-2026-20079
Cisco Secure Firewall Management Center Authentication Bypass Remote Code Execution Vulnerability
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
A vulnerability in the web interface of Cisco Secure Firewall Management Center (FMC) Software 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. This vulnerability is due to an improper system process that is created at boot time. An attacker could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute a variety of scripts and commands that allow root access to the device.
Official description from the CVE record, published by cisco. Copyright © 1999-2026 The MITRE Corporation. See /security/cve/legal for the CVE license. View the record on cve.org
Key data
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector: Network
The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity: Low
No special conditions are needed. The attack can be repeated at will.
Privileges required: None
No account or privileges are needed.
User interaction: None
No action from any user is needed.
Scope: Changed
The impact can reach other components beyond the vulnerable one.
Confidentiality impact: High
Serious or total effect on the secrecy of data.
Integrity impact: High
Serious or total effect on the trustworthiness of data.
Availability impact: High
Serious or total effect on availability.
| Metric | Value | What it means |
|---|---|---|
| Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. |
| Attack complexity | Low | No special conditions are needed. The attack can be repeated at will. |
| Privileges required | None | No account or privileges are needed. |
| User interaction | None | No action from any user is needed. |
| Scope | Changed | The impact can reach other components beyond the vulnerable one. |
| Confidentiality impact | High | Serious or total effect on the secrecy of data. |
| Integrity impact | High | Serious or total effect on the trustworthiness of data. |
| Availability impact | High | Serious or total effect on availability. |
CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.
- Score
- 0.88658 (88.7% probability)
- Percentile
- 99.8%
- Scores of
- Nov 10, 2026
- Model
- v2026.06.15
- Name in the catalog
- Cisco Firewall Management Center Authentication Bypass Using an Alternate Path or Channel Vulnerability
- Added to the catalog
- Sep 9, 2026
- Federal due date
- Sep 12, 2026
- Exploitation
- Recorded by CISA as active
- Automatable
- yes
- Technical impact
- total
- CWE-288Authentication Bypass Using an Alternate Path or Channel
Cisco Secure Firewall Management Center (FMC)
- affected: 7.0.0
- affected: 7.0.0.1
- affected: 7.0.1
- affected: 7.1.0
- affected: 7.0.1.1
- affected: 7.1.0.1
- affected: 7.0.2
- affected: 7.2.0
- affected: 7.0.2.1
- affected: 7.0.3
- affected: 7.1.0.2
- affected: 7.2.0.1
- affected: 7.0.4
- affected: 7.2.1
- affected: 7.0.5
- affected: 7.3.0
- affected: 7.2.2
- affected: 7.3.1
- affected: 7.2.3
- affected: 7.1.0.3
- affected: 7.2.3.1
- affected: 7.2.4
- affected: 7.0.6
- affected: 7.2.4.1
- affected: 7.2.5
- and 47 more
- cisco-sa-onprem-fmc-authbypass-5JPp45V2 (sec.cloudapps.cisco.com)
- seclists.org
- ID reserved
- Record published
- Added to CISA KEV
- Record last updated
Look up another CVE
Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:07 UTC. Sources and licenses