All CVEs
Vulnerability intelligence

CVE-2020-3259

Cisco ASA and FTD Information Disclosure Vulnerability

Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) CWE-200

A vulnerability in the web services interface of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to retrieve memory contents on an affected device, which could lead to the disclosure of confidential information. The vulnerability is due to a buffer tracking issue when the software parses invalid URLs that are requested from the web services interface. An attacker could exploit this vulnerability by sending a crafted GET request to the web services interface. A successful exploit could allow the attacker to retrieve memory contents, which could lead to the disclosure of confidential information. Note: This vulnerability affects only specific AnyConnect and WebVPN configurations. For more information, see the Vulnerable Products section.

CVSS Score
7.5
High
EPSS — Exploit Probability
72%
Riskier than 99% of all CVEs · checked 2026-10-22
Exploitation
Confirmed in the wild
Used in ransomware campaigns
Remediation
unknown
Federal deadline 2024-03-07
CISA required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Deadline for federal agencies: 2024-03-07.

NVD entry PoC / advisory CISA KEV

No linked coverage yet. CyberSIXT tracks this CVE and coverage will appear here.

Related CVEs — Cisco