PT-2025-33328 · Cisco · Cisco Secure Firewall Asa+2

Keane Okelley · Published 2025-08-14 · Updated 2025-08-15 · CVE-2025-20243

Positive Technologies (AI Summary)

CVSS v3.1

8.6

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: Cisco Secure Firewall ASA Software and Secure FTD Software (affected versions not specified)

Description: A vulnerability exists in the management and VPN web servers that could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial-of-service (DoS) condition. This issue is due to improper validation of user-supplied input on an interface with VPN web services. An attacker could exploit this by sending crafted HTTP requests to a targeted web server on an affected device.

Recommendations: At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Infinite Loop

Weakness Enumeration

CWE-835

Related Identifiers

BDU:2025-10345

CVE-2025-20243

Affected Products

Cisco Asa

Cisco Secure Firewall Asa

Secure Ftd

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2025-20243 · Security Note
• https://bdu.fstec.ru/vul/2025-10345 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-dos-mfPekA6e · Vendor Advisory
• https://twitter.com/CVEnew/status/1956390329281613893 · Twitter Post
• https://twitter.com/CveFindCom/status/1956041021541724478 · Twitter Post
• https://t.me/true_secator/7332 · Telegram Post