CVE-2026-20079
"Cisco Secure Firewall Management Center FMC Unauthorized Script Execution"
Description
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.
INFO
Published Date :
March 4, 2026, 6:16 p.m.
Last Modified :
March 5, 2026, 7:39 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-20079
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | CRITICAL | MITRE-CVE |
Solution
- Update Cisco Secure Firewall Management Center Software to a fixed version.
- Apply vendor-provided patches or updates immediately.
- Monitor systems for any signs of compromise.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-20079.
| URL | Resource |
|---|---|
| https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-onprem-fmc-authbypass-5JPp45V2 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-20079 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-20079
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-20079 vulnerability anywhere in the article.
-
The Hacker News
Cisco Confirms Active Exploitation of Two Catalyst SD-WAN Manager Vulnerabilities
Cisco has disclosed that two more vulnerabilities affecting Catalyst SD-WAN Manager (formerly SD-WAN vManage) have come under active exploitation in the wild. The vulnerabilities in question are liste ... Read more
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Help Net Security
Cisco warns of SD-WAN Manager exploitation, fixes 48 firewall vulnerabilities
Cisco has confirmed that two Catalyst SD-WAN Manager vulnerabilities (CVE-2026-20128 and CVE-2026-20122) patched in late February 2025 are being exploited by attackers. The exploited vulnerabilities ( ... Read more
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security.nl
Kritiek Cisco-lek geeft aanvaller root-toegang tot Firewall Management Center
Cisco waarschuwt voor een kritieke kwetsbaarheid waardoor een ongeauthenticeerde aanvaller op afstand root-toegang tot het Cisco Secure Firewall Management Center (FMC) kan krijgen. Het Nationaal Cybe ... Read more
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CybersecurityNews
Cisco Secure Firewall Management Vulnerability Allow Attackers to Bypass Authentication
Cisco Secure Firewall Management Vulnerability Cisco has released a critical security advisory warning of a severe vulnerability in its Secure Firewall Management Center (FMC) Software. This flaw allo ... Read more
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TheCyberThrone
Two Perfect 10s: Cisco FMC Under Siege
Two unauthenticated remote code execution vulnerabilities — both scoring a perfect 10.0 on the CVSS scale — were disclosed on March 4, 2026 affecting Cisco Secure Firewall Management Center. Either fl ... Read more
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Daily CyberSecurity
Root Access for All: Critical Auth Bypass Hits Cisco Firewall Management Center
Cybersecurity authorities are sounding the alarm on a critical vulnerability in the Cisco Secure Firewall Management Center (FMC). The flaw, tracked as CVE-2026-20079, has been assigned a maximum CVSS ... Read more
The following table lists the changes that have been made to the
CVE-2026-20079 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Mar. 04, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-288 Added Reference https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-onprem-fmc-authbypass-5JPp45V2