AEGLIX vulnerability intelligence
CVE-2025-20333
CRITICAL · CVSS 9.9 · Analyzed
Published: 2025-09-25 · Updated: 2026-10-18 · Source: NVD
Vulnerability overview
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 authenticated, remote attacker to execute arbitrary code on an affected device. This vulnerability is due to improper validation of user-supplied input in HTTP(S) requests. An attacker with valid VPN user credentials could exploit this vulnerability by sending crafted HTTP requests to an affected device. A successful exploit could allow the attacker to execute arbitrary code as root, possibly resulting in the complete compromise of the affected device.
Severity and scoring
- CVSS score
- 9.9 · CRITICAL
- CVSS version
- 3.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-120
CVSS measures technical severity; it does not establish whether this vulnerability is being exploited in your environment.
Known exploitation and remediation
Listed in CISA’s Known Exploited Vulnerabilities catalog.
- Affected product
- Cisco · Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense
- Added to catalog
- 2025-09-25
- Required action
- 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.
- CISA remediation due date
- 2025-09-26
CISA deadlines apply to the organizations covered by its directives. Confirm your own remediation requirements.
Verify affected versions and patch availability in the vendor advisory before making changes.
Affected products and versions
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
From (inclusive): 9.12
Before (exclusive): 9.12.4.72
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
From (inclusive): 9.14
Before (exclusive): 9.14.4.28
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
From (inclusive): 9.16
Before (exclusive): 9.16.4.85
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
From (inclusive): 9.17.0
Before (exclusive): 9.17.1.45
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
From (inclusive): 9.18
Before (exclusive): 9.18.4.47
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
From (inclusive): 9.19
Before (exclusive): 9.19.1.37
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
From (inclusive): 9.20
Before (exclusive): 9.20.3.7
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
From (inclusive): 9.22
Before (exclusive): 9.22.1.3
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*
From (inclusive): 7.0.0
Before (exclusive): 7.0.8.1
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*
From (inclusive): 7.1.0
Before (exclusive): 7.2.9
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*
From (inclusive): 7.3.0
Before (exclusive): 7.4.2.4
cpe:2.3:a:cisco:secure_firewall_threat_defense:7.6.0:*:*:*:*:*:*:*
These are NVD CPE applicability entries. Some products depend on configuration conditions; consult the official record to confirm applicability.
Advisories and references
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-webvpn-z5xP8EUB
Vendor Advisory
- https://sec.cloudapps.cisco.com/security/center/resources/asa_ftd_continued_attacks
Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-20333
US Government Resource