Skip to main content

CVE-2025-20362

Cisco — Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Missing Authorization Vulnerability

Cisco · CWE-862 — Missing authorization · in CISA KEV since 2025-09-25

KEV since 2025 · listed over a yearCISA KEVActively Exploited
83

EVRS 83 of 100 Urgent

Patch This Cycle

Rank 513 of 2,960 tracked

Download PDF

Why it scores 83

Evidence available: 6 of 7 signals

Listed in the CISA KEV catalog, and an EPSS probability of 0.871.

  • CISA KEVApplied
  • RansomwareDid not apply
  • Vendor exploitationDid not apply
  • EPSSApplied
  • Microsoft Exploitability IndexNot applicable
  • Pre-patch disclosureNo data
  • KEV recencyDid not apply
  • CVSSApplied

The band answers “how soon”, not “how bad”. No data for: Pre-patch disclosure. Why some signals show no data

Fix

Patch or fixed version identified

CISA required action

Fixed in

adaptive security appliance software: update to 9.12.4.72 or later | adaptive security appliance software: update to 9.14.4.28 or later | adaptive security appliance software: update to 9.16.4.85 or later | adaptive security appliance software: update to 9.18.4.67 or later | adaptive security appliance software: update to 9.20.4.10 or later | adaptive security appliance software: update to 9.22.2.14 or later

Affected versions

  • secure firewall threat defense>= 7.0.0 < 7.0.8.1>= 7.1.0 < 7.2.10.2>= 7.3.0 < 7.4.2.4>= 7.6.0 < 7.6.2.1>= 7.7.0 < 7.7.10.1
  • adaptive security appliance software>= 9.12 < 9.12.4.72>= 9.14 < 9.14.4.28>= 9.16 < 9.16.4.85>= 9.17.0 < 9.18.4.67>= 9.19 < 9.20.4.10>= 9.22 < 9.22.2.14>= 9.23 < 9.23.1.19

Remediation

The KEV due date refers to the deadline by which FCEB agencies are expected to review and begin implementing the guidance outlined in Emergency Directive (ED) 25-03 (URL listed below in Notes). Agencies must follow the mitigation steps provided by CISA (URL listed below in Notes) and vendor’s instructions (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.

Fixed versions from NVD.

Evidence

Each value with its source
MeasureValueSource
CVSS base scoreHow severe the flaw is in itself. It does not say how likely an attack is. 8.6 NVD
FIRST EPSSFIRST's estimate of the chance this is exploited in the next 30 days, and how that ranks against all CVEs. 0.871 (99.75th pctl) FIRST EPSS
Actively exploitedWhether a source of record has confirmed attacks using it in the wild. Confirmed CISA KEV
Ransomware campaign useWhether CISA has seen ransomware operators use it. Unknown or none CISA KEV
CISA remediation deadlineThe date US federal agencies must have fixed or mitigated it. 2025-09-26 · KEV since 2025 · listed over a year CISA KEV
Public exploit moduleA module existing is not the same as active exploitation. None known Metasploit
EUVD cross-referenceENISA's record: CVSS 6.5 (v3.1), assigned by cisco. Listed ENISA EUVD

Description

NVD

Update: On November 5, 2025, Cisco became aware of a new attack variant against devices running Cisco Secure ASA Software or Cisco Secure FTD Software releases that are affected by CVE-2025-20333 and CVE-2025-20362. This attack can cause unpatched devices to unexpectedly reload, leading to denial of service (DoS) conditions. Cisco strongly recommends that all customers upgrade to the fixed software releases that are listed in the Fixed Software ["#fs"] section of this advisory. A vulnerability in the VPN web server of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to access restricted URL endpoints that are related to remote access VPN that should otherwise be inaccessible without authentication. This vulnerability is due to improper validation of user-supplied input in HTTP(S) requests. An attacker could exploit this vulnerability by sending crafted HTTP requests to a targeted web server on a device. A successful exploit could allow the attacker to access a restricted URL without authentication.

What CISA says to do