CVE-2020-3259

Act now ● On CISA KEV — actively exploited used in ransomware

Actively exploited — on the CISA KEV list.

CVSS base

7.5 HIGH

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

EPSS — probability of exploitation (30 days)

71.8%

99.4th percentile

CISA KEV

Listed

Added 2024-02-15 · patch by 2024-03-07

Weakness / dates

CWE-200

Published 2020-05-06 · modified 2026-08-12

CVSS breakdown

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

Attack Vector	N	Network
Attack Complexity	L	Low
Privileges Required	N	None
User Interaction	N	None
Scope	U	Unchanged
Confidentiality	H	High
Integrity	N	None
Availability	N	None

Timeline

2020-05-06 — Published (NVD)
2024-02-15 — Added to CISA KEV (actively exploited)
2024-03-07 — CISA patch-by deadline
2026-08-12 — Last modified (NVD)

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.

Affected

cisco

References

Official: NVD · CVE.org