CVE-2020-3259 — Cisco ASA and FTD Information Disclosure Vulnerability

Exploitation status

CVE-2020-3259 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 2024-02-15. Cisco Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD) contain an information disclosure vulnerability. An attacker could retrieve memory contents on an affected device, which could lead to the disclosure of confidential information due to a buffer tracking issue when the software parses invalid URLs that are requested from the web services interface. This vulnerability affects only specific AnyConnect and WebVPN configurations.

Advisory facts

Vendor or project

Cisco

Affected product

Adaptive Security Appliance (ASA) and Firepower Threat Defense (FTD)

Added to CISA KEV

2024-02-15

US federal remediation due date

2024-03-07

Ransomware association

Known

EPSS score

—

Weakness (CWE)

CWE-200

Remediation: the required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Wording published by CISA for this catalog entry. It is the baseline action, not a decision about your environment: whether this exposure matters for you depends on where the affected component runs, what it is exposed to and who owns it.

From advisory to a decision you can defend

A catalog entry tells you a vulnerability is being exploited somewhere. It does not tell you whether it matters in your estate, who owns the fix, or what evidence an auditor will ask for later. That is the work VulnTrek does: it takes findings from the tools you already run, decides which exposure actually matters, routes it to an owner, keeps remediation human-approved and retains the lineage as evidence.