---
id: CVE-2026-76413
title: "A vulnerability in Cisco Adaptive Security Device Manager (ASDM) single sign-on (SSO) handler for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to log in as the Cisco ASDM administrator user.\r\n\r\nThis vulnerabi…"
summary: "A vulnerability in Cisco Adaptive Security Device Manager (ASDM) single sign-on (SSO) handler for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to log in as the Cisco ASDM administrator user.\r\n\r\nThis vulnerabi…"
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H'
cwe:
  - CWE-1259
vendor: Cisco
product: Cisco Secure Firewall Management Center (FMC)
affected:
  - secure_firewall_management_center_fmc 7.0.0
  - secure_firewall_management_center_fmc 7.0.0.1
  - secure_firewall_management_center_fmc 7.0.1
  - secure_firewall_management_center_fmc 7.0.1.1
  - secure_firewall_management_center_fmc 7.0.2
  - secure_firewall_management_center_fmc 7.2.0
  - secure_firewall_management_center_fmc 7.0.2.1
  - secure_firewall_management_center_fmc 7.0.3
  - secure_firewall_management_center_fmc 7.2.0.1
  - secure_firewall_management_center_fmc 7.0.4
  - secure_firewall_management_center_fmc 7.2.1
  - secure_firewall_management_center_fmc 7.0.5
  - secure_firewall_management_center_fmc 7.3.0
  - secure_firewall_management_center_fmc 7.2.2
  - secure_firewall_management_center_fmc 7.3.1
  - secure_firewall_management_center_fmc 7.2.3
  - secure_firewall_management_center_fmc 7.2.3.1
  - secure_firewall_management_center_fmc 7.2.4
  - secure_firewall_management_center_fmc 7.0.6
  - secure_firewall_management_center_fmc 7.2.4.1
  - secure_firewall_management_center_fmc 7.2.5
  - secure_firewall_management_center_fmc 7.3.1.1
  - secure_firewall_management_center_fmc 7.4.0
  - secure_firewall_management_center_fmc 7.0.6.1
  - secure_firewall_management_center_fmc 7.2.5.1
  - secure_firewall_management_center_fmc 7.4.1
  - secure_firewall_management_center_fmc 7.2.6
  - secure_firewall_management_center_fmc 7.4.1.1
  - secure_firewall_management_center_fmc 7.0.6.2
  - secure_firewall_management_center_fmc 7.2.7
  - secure_firewall_management_center_fmc 7.2.5.2
  - secure_firewall_management_center_fmc 7.3.1.2
  - secure_firewall_management_center_fmc 7.2.8
  - secure_firewall_management_center_fmc 7.6.0
  - secure_firewall_management_center_fmc 7.4.2
  - secure_firewall_management_center_fmc 7.2.8.1
  - secure_firewall_management_center_fmc 7.0.6.3
  - secure_firewall_management_center_fmc 7.4.2.1
  - secure_firewall_management_center_fmc 7.2.9
  - secure_firewall_management_center_fmc 7.0.7
  - secure_firewall_management_center_fmc 7.7.0
  - secure_firewall_management_center_fmc 7.4.2.2
  - secure_firewall_management_center_fmc 7.2.10
  - secure_firewall_management_center_fmc 7.6.1
  - secure_firewall_management_center_fmc 7.4.2.3
  - secure_firewall_management_center_fmc 7.0.8
  - secure_firewall_management_center_fmc 7.6.2
  - secure_firewall_management_center_fmc 7.7.10
  - secure_firewall_management_center_fmc 7.2.10.1
  - secure_firewall_management_center_fmc 7.0.8.1
published: '2026-09-16'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T13:28:28.567'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-76413'
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc2-multivulns-HXgcqRG
    label: psirt@cisco.com
  - url: 'https://software.cisco.com'
tags:
  - nvd
  - cve.org
  - csaf
  - vendor-advisory
  - cisco
epss: 0.00457
epssPercentile: 0.36898
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-17T14:17:28.566640Z'
ingestedAt: '2026-09-16T16:37:52.189Z'
---

## Overview

A vulnerability in Cisco Adaptive Security Device Manager (ASDM) single sign-on (SSO) handler for Cisco Secure FMC Software could allow an unauthenticated, remote attacker to log in as the Cisco ASDM administrator user.

This vulnerability is due to improper management of the Cisco ASDM SSO token. An attacker could exploit this vulnerability by performing session token forgery techniques. A successful exploit could allow the attacker to log in as the administrator user and, by repeating this action, keep legitimate administrators locked out of the ASDM indefinitely.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **cisco-sa-fmc2-multivulns-HXgcqRG** · Cisco · affected: Cisco Secure Firewall Management Center (FMC) Appliances · updated 2026-09-16 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc2-multivulns-HXgcqRG)