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Cisco Secure FMC EUVDEUVD-2026-81129

| CVE-2026-20344 HIGH
SQL Injection (CWE-89)
2026-09-16 cisco GHSA-fw9q-5m2f-8vhx
8.8
CVSS 3.1 · NVD
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Severity by source

Vendor (cisco) PRIMARY
HIGH
qualitative
NVD
8.8 HIGH
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
8.8 HIGH

Network-reachable SQLi, low complexity; PR:L for the required privileged FMC role; DB read plus admin-session theft yields full admin C/I/A:H; S:U as impact stays within FMC.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Primary rating from Vendor (cisco).

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Analysis Generated
Sep 16, 2026 - 21:39 vuln.today
CVE Published
Sep 16, 2026 - 20:13 nvd
HIGH 8.8

DescriptionNVD

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.

AnalysisAI

SQL injection in Cisco Secure FMC's web-based management interface allows an authenticated, remote attacker holding a Security Approver, Access Admin, or Network Admin role to execute arbitrary SQL against the backend database, potentially exfiltrating any data and capturing session credentials of an authenticated Administrator. The CVSS 3.1 vector (8.8, AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) reflects low attack complexity gated only by the required privileged account, and no public exploit code or active exploitation has been identified at time of analysis.

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Persist
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Impact
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Vulnerability AssessmentAI

Exploitation Requires a valid, pre-existing FMC account holding one of three specific roles - Security Approver, Access Admin, or Network Admin - plus network reachability to the web-based management interface (HTTPS). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, base 8.8) describes a network-reachable, low-complexity SQL injection whose only meaningful barrier is authentication (PR:L). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Apply the fixed software version specified in the Cisco security advisory at https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-mulivulns-4PsnFwvx; no vendor-released patch version is identified in the available data, so consult the advisory for the exact patched release for your train. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours, confirm whether Cisco Secure Firewall Management Center (FMC) is deployed and restrict web management interface access to trusted administrative networks, enforce MFA for all administrative accounts, immediately review and disable unnecessary accounts with Security Approver, Access Admin, or Network Admin roles, and enable detailed logging and alerting for SQL injection or anomalous session activity. …

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EUVD-2026-81129 vulnerability details – vuln.today

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