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CVE-2020-3259

CWE-200

High

89.7

RPS

Description

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.

Source: NVD

Signals

CVSS
7.5
High · v3.1
EPSS
71.78%
Probability of exploitation in the next 30 days (FIRST)
CISA KEV
In CISA KEV since Feb 2024
Fix commit
No known fix commit
Sources: MoreFixes, FreshFixes
Weakness
CWE-200
Published
6 May 2020
Last modified 12 Aug 2026

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Data as of 7 Oct 2026, 05:16 UK time

CVE-2020-3259 · RPS 89.7 · DevSecure Intelligence