CVE-2025-20362: Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Missing Authorization Vulnerability

criticalknown exploitedpublic exploitCVE-2025-20362

Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.

Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Software VPN Web Server contain a missing authorization vulnerability. This vulnerability could be chained with CVE-2025-20333.

CSIRTS triage

vendor: Cisco product: Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD)Authentication bypass

What: The vulnerability involves missing authorization that could be chained with another vulnerability.
Who is affected: Users of Cisco Secure Firewall ASA and FTD Software VPN Web Server.
Urgency: Critical urgency for remediation due to active exploitation and potential for chaining with other vulnerabilities.
Action: Implement the recommended patches from Cisco.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD)

Get an email when a new Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) advisory drops — max one per day, one-click unsubscribe.

Details

Source: CISA Known Exploited Vulnerabilities (US · database · site)
Severity: critical
Published: 2025-09-25
Exploitation: Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-20362

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Exploitation confirmedCVE-2025-20362Already exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 99.7% of all EPSS-scored CVEs.

Referenced CVEs

CVE	CSIRTS overview	External
CVE-2025-20362	coverage & exploitation status	NVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

unknownexploitedContinued Evolution of Persistence Mechanism Against Cisco Secure Firewall Adaptive Security Appliance and Sec…cisco-psirt
unknownexploited[Update] Multiple vulnerabilities in Cisco ASA and FTD (September 25, 2025)cert-fr-alerte

Recent advisories for Cisco Secure Firewall

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

highexploitedAL26-018 - Vulnerability affecting Cisco ASA and Secure Firewall Threat Defense Software Remote Access SSL VPN…cccs · 2026-08-13
unknownexploitedNCSC-2026-0295 [1.00] [M/H] Vulnerability patched in Cisco Secure Firewall ASA and FTD softwarencsc-nl · 2026-08-12
highexploited[NEW] [high] Cisco ASA (Adaptive Security Appliance) and Secure Firewall Threat Defense: Vulnerability enables…cert-bund · 2026-08-12
highexploitedCisco Secure Firewall Management Center Software Static Credential Vulnerabilitycisco-psirt · 2026-08-11
highexploitedCVE-2026-20349: A vulnerability in the Remote Access SSL VPN service for Cisco Secure Firewall Adaptive Securi…nvd · 2026-08-11
highexploitedCisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SS…cisco-psirt · 2026-08-11

CVE-2025-20362: Cisco Secure Firewall Adaptive Security (ASA) Appliance and Secure Firewall Threat Defense (FTD) Missing Authorization Vulnerability

CSIRTS triage

Details

Exploitation outlook

Referenced CVEs

Same CVEs, other sources

Recent advisories for Cisco Secure Firewall

More from CISA Known Exploited Vulnerabilities