CVE-2026-20344

Cisco Secure Firewall Management Center Software SQL Injection Vulnerability

Public exploit available. Not confirmed exploited in the wild yet. No fix published yet.

CVSS 3.18.8High EPSS percentile28th0.4% chance in 30 days CISA KEVNot listedNo confirmed exploitation
Public exploit: 0 sources FixNone yetNo fix or workaround published

Published 2026-09-16Updated 2026-09-18Sources: CVE.org, NVD

NVD CVE.org

What to do

No fixed build or workaround is published yet. Limit exposure and watch for a patch.

Steps

Written by AI from the record

Check whether you run Cisco Secure Firewall Management Center and identify everyone assigned Security Approver, Access Admin, or Network Admin roles.
No fixed version has been published; ask Cisco or your support provider for the vendor-approved remediation and release plan for CVE-2026-20344.
Immediately remove unnecessary privileged accounts, require multi-factor authentication where available, and restrict management-interface access to trusted administrator networks.
Review recent administrator logins, role changes, configuration changes, and new accounts for unexpected activity.

May need vendor or contractor work

Is your organisation exposed?Request an assessment to establish which checks fit your systems.

What it is

From the CVE record

A vulnerability in the web-based management interface of Cisco Secure FMC Software could allow an authenticated, remote attacker to perform a SQL injection attack against an affected device. To exploit this vulnerability, the attacker must have a valid account on the device with the role of Security Approver, Access Admin, or Network Admin. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a crafted HTTP request to the web-based management interface of an affected device. A successful exploit could allow the attacker to obtain any data from the database, obtain the session credentials of an authenticated Administrator, and take actions with administrative privileges on the affected device.

In plain language

Written by AI from the record

A serious flaw in Cisco Secure Firewall Management Center lets a privileged user take over the management system; small businesses using it should act now.

Authenticated SQL injection in the Cisco Secure Firewall Management Center web management interface allows Security Approver, Access Admin, or Network Admin users to extract database data, hijack an Administrator session, and perform administrative actions.

If you're affected

Firewall management takeover
Administrator session theft
Security settings changed
Sensitive database data exposure
Network protection disruption

What is it

Cisco Secure Firewall Management Center is used to centrally control firewall security settings. This flaw is like giving someone with a trusted staff badge a way to open the control room, copy its records, and operate the controls as the administrator.

Who is affected

This matters to you if you run Cisco Secure Firewall Management Center to manage your firewalls. It is only a risk if an attacker already has a valid account with the Security Approver, Access Admin, or Network Admin role and can reach its web management interface.

How urgent is it

A public exploit is available, so treat this as urgent even though CISA has not added it to its known-exploited list. Reduce who can reach and administer the management system now, then obtain Cisco’s remediation guidance as soon as possible.

What to do — in detail

Confirm exposure by inventorying Cisco Secure Firewall Management Center deployments, identifying their software versions, and reviewing accounts with Security Approver, Access Admin, or Network Admin roles. Check whether the web management interface is reachable from administrator networks or broader networks.

No fixed version or supported release branch has been published in the available findings. Do not attempt an unverified upgrade target; obtain Cisco’s advisory or support guidance for CVE-2026-20344 before scheduling remediation.

Until a vendor fix is available, limit web-management access to a dedicated administrator network or VPN, remove unneeded privileged roles and accounts, enforce strong authentication controls available in your environment, and rotate credentials for accounts that may have been exposed. Review web-interface and audit logs for unusual privileged logins, new accounts, role changes, administrator-session activity, and unexpected configuration changes. CISA has not assigned a KEV remediation due date because this CVE is not listed in KEV.

Technical context

Severity is CVSS 8.8 High (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H). The weakness is CWE-89 SQL injection caused by insufficient validation of user-supplied input in the web-based management interface; exploitation requires authentication with Security Approver, Access Admin, or Network Admin privileges and a crafted HTTP request. A public exploit is available. CISA KEV does not list this CVE. EPSS predicts 0.4% likelihood (31st percentile) with a flat trend; this is a prediction, not confirmation of in-the-wild exploitation.

This is a general assessment based on public vulnerability data. It does not account for your specific infrastructure — when in doubt, consult a security specialist.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS28th

Public exploit

CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

0 sources with a proof of concept or module.

Exploit links, PoCs and Metasploit modules after sign-in

EPSS

0.4% chance of exploitation activity in the next 30 days, which ranks it in the 28th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

6 events over 2 days, from the signal feeds we watch.

2026-09-18Record updatedrecord updated
2026-09-16Publishedweakness classified, att&ck mapped, record updated

Affected products

Ciscocommercial · USaka cisco systems inc., cisco systems
- Cisco Secure Firewall Management Center (FMC)Networking Infrastructure

Technical detail

CVSS 3.1 vector

Open in the CVSS calculator

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Scored 8.8 by NVD.

How it is reached

Attack Vector NetworkExploitable remotely over the network without any special conditions
Attack Complexity LowNo special conditions — the attack can be reliably reproduced
Privileges Required LowRequires basic user-level privileges
User Interaction NoneNo user interaction needed — fully automated exploitation

Scope

Scope UnchangedImpact is limited to the vulnerable component itself

Impact if exploited

Confidentiality HighTotal information disclosure — all data in the component is compromised
Integrity HighTotal loss of integrity — attacker can modify any data in the component
Availability HighTotal denial of service — the component is completely unavailable