9.9
Critical
Exploited
CVE-2025-20333 Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow Vulnerability
Active exploitation observed
· CISA KEV catalogue
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.
Ransomware campaigns
Not observed so far
Weakness
CWE-120
Description
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.22 | 9.22.1.1 → 9.22.1.2 | No fix stated |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.20 | 9.20.1 → 9.20.3.4 | No fix stated |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.19 | 9.19.1 → 9.19.1.31 | No fix stated |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.18 | 9.18.1 → 9.18.4.40 | No fix stated |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.17 | 9.17.1 → 9.17.1.39 | No fix stated |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.16 | 9.16.1 → 9.16.4.84 | No fix stated |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.14 | 9.14.1 → 9.14.4.24 | No fix stated |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.12 | 9.12.1 → 9.12.4.67 | No fix stated |
| Cisco Secure Firewall Adaptive Security Appliance (ASA) Software 9.8 | 9.8.1 → 9.8.4.48 | No fix stated |
Show the 9 other branches Hide the 9 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco Secure Firewall Threat Defense (FTD) Software | 7.6.0 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.4 | 7.4.0 → 7.4.2.3 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.3 | 7.3.0 → 7.3.1.2 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.2 | 7.2.0 → 7.2.8.1 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.1 | 7.1.0 → 7.1.0.3 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 7.0 | 7.0.0 → 7.0.8 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.6 | 6.6.0 → 6.6.7.2 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.4 | 6.4.0 → 6.4.0.18 | No fix stated |
| Cisco Secure Firewall Threat Defense (FTD) Software 6.2 | 6.2.3 → 6.2.3.18 | No fix stated |
References
- cisco-sa-asaftd-webvpn-z5xP8EUB sec.cloudapps.cisco.com
Timeline
- Published
- Added to the KEV catalogue
- Last modified
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