CVE-2024-20481 KEV
Patch first
On CISA KEV — known exploited in the wild, due 2024-11-14.
Description
A vulnerability in the Remote Access VPN (RAVPN) service of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) of the RAVPN service. This vulnerability is due to resource exhaustion. An attacker could exploit this vulnerability by sending a large number of VPN authentication requests to an affected device. A successful exploit could allow the attacker to exhaust resources, resulting in a DoS of the RAVPN service on the affected device. Depending on the impact of the attack, a reload of the device may be required to restore the RAVPN service. Services that are not related to VPN are not affected. Cisco Talos discussed these attacks in the blog post Large-scale brute-force activity targeting VPNs, SSH services with commonly used login credentials.
Scoring
| CVSS | 5.8 (MEDIUM, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L |
| EPSS | 15.75% — more likely to be exploited than 97% of all CVEs |
| Weakness | CWE-772 |
| On CISA KEV | yes — remediate by 2024-11-14 |
| Public exploit | none known |
| Published | 2024-10-23 |
| Last modified | 2026-08-11 |
CISA KEV
| Name | Cisco ASA and FTD Denial-of-Service Vulnerability |
|---|---|
| Added | 2024-10-24 |
| Due | 2024-11-14 |
| Vendor / product | Cisco / Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) |
| Ransomware use | none reported |
Affected (2)
| Vendor | Product |
|---|---|
| cisco | adaptive security appliance software |
| cisco | secure firewall threat defense |
References
→ the Explorer · watch your stack · NVD