CVE-2020-3259

CVE Enrichment

CVSS: 7.5 HIGH
EPSS: 71.79%
EPSS Percentile: 99.42%
CISA KEV: YES — Known Exploited Vulnerability

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: psirt@cisco.com
Published: 07-May-2020 00:15
Last Modified: 12-Aug-2026 12:17
EPSS Date: 2026-10-20
CWE: CWE-200

CVSS Vector


            CVSS:3.1                            AV:N /
                            AC:L /
                            PR:N /
                            UI:N /
                            S:U /
                            C:H /
                            I:N /
                            A:N

CISA KEV Details

Date Added: 2024-02-15
Remediation Due: 2024-03-07
Known Ransomware Campaign Use: Known
Required Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Notes: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-info-disclose-9eJtycMB; https://nvd.nist.gov/vuln/detail/CVE-2020-3259

Affected Products / Versions

cisco / secure_firewall_threat_defense
Version / affected range: * · from (inclusive) 6.2.3 · before (exclusive) 6.2.3.16
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*
cisco / secure_firewall_threat_defense
Version / affected range: * · from (inclusive) 6.3.0 · before (exclusive) 6.3.0.6
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*
cisco / secure_firewall_threat_defense
Version / affected range: * · from (inclusive) 6.4.0 · before (exclusive) 6.4.0.9
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*
cisco / secure_firewall_threat_defense
Version / affected range: * · from (inclusive) 6.5.0 · before (exclusive) 6.5.0.5
cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*
cisco / adaptive_security_appliance_software
Version / affected range: * · from (inclusive) 9.8 · before (exclusive) 9.8.4.20
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cisco / adaptive_security_appliance_software
Version / affected range: * · from (inclusive) 9.9 · before (exclusive) 9.9.2.67
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cisco / adaptive_security_appliance_software
Version / affected range: * · from (inclusive) 9.10 · before (exclusive) 9.10.1.40
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cisco / adaptive_security_appliance_software
Version / affected range: * · from (inclusive) 9.12 · before (exclusive) 9.12.3.9
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*
cisco / adaptive_security_appliance_software
Version / affected range: * · from (inclusive) 9.13 · before (exclusive) 9.13.1.10
cpe:2.3:o:cisco:adaptive_security_appliance_software:*:*:*:*:*:*:*:*

References

Last enrichment sync: 21-Oct-2026 07:46
Sources: NVD · FIRST EPSS · CISA KEV
Latest successful provider update; providers refresh independently.

Reported Context (1)

CVE-2020-3259 [Common Weakness Enumeration (CWE)-200: Exposure of Sensitive Information to an Unauthorized Actor] Joint Advisory Details SafePay Ransomware Tactics After at Least 600 Victims

CVE (4)

Malware (1)

Threat Actors (1)

MITRE ATT&CK (15)

Vendors (2)

Products (5)

Tools (10)

Industries (1)

Countries (1)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.