Medium 6.5Known exploited (CISA KEV)Published Sep 25, 2025

CVE-2025-20362Update: 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…

Updated under an hour ago (2026-10-19 04:50 UTC)

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It affects Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and 3 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Sep 25, 2025; federal agencies had to remediate by Sep 26, 2025. Treat that date as your deadline.

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Every CVE for Cisco Secure Firewall Adaptive Security Appliance (ASA) Software

Exploited in the last 30 days

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.

CVSS: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness (CWE): CWE-862
Known exploited: Added to CISA KEV Sep 25, 2025; federal remediation due Sep 26, 2025The 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.
EPSS (exploitation in the next 30 days): 87.09% (percentile 100)
Assigned by: cisco
NVD analysis: Analyzed
Record last updated: Feb 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software cisco:secure_firewall_adaptive_security_appliance_asa_software (from the name)	9.8.1; 9.8.1.5; 9.8.1.7; 9.8.2; 9.8.2.8; 9.8.2.14; 9.8.2.15; 9.8.2.17; and 193 more ranges	CNA record
Cisco Cisco Secure Firewall Threat Defense (FTD) Software cisco:secure_firewall_threat_defense_ftd_software (from the name)	6.2.3; 6.2.3.1; 6.2.3.2; 6.2.3.3; 6.2.3.4; 6.2.3.5; 6.2.3.6; 6.2.3.7; and 92 more ranges	CNA record
cisco adaptive_security_appliance_software cisco:adaptive_security_appliance_software	from 9.12 before 9.12.4.72; from 9.14 before 9.14.4.28; from 9.16 before 9.16.4.85; from 9.17.0 before 9.18.4.67; from 9.19 before 9.20.4.10; from 9.22 before 9.22.2.14; from 9.23 before 9.23.1.19	NVD
cisco secure_firewall_threat_defense cisco:secure_firewall_threat_defense	from 7.0.0 before 7.0.8.1; from 7.1.0 before 7.2.10.2; from 7.3.0 before 7.4.2.4; from 7.6.0 before 7.6.2.1; from 7.7.0 before 7.7.10.1	NVD

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-webvpn-YROOTUWvendor-advisory
https://sec.cloudapps.cisco.com/security/center/resources/asa_ftd_continued_attacksvendor-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-20362us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.