CVE-2020-3133 MEDIUM

CVE-2020-3133: Cisco Email Security Appliance Content Filter Bypass Vulnerability

Vendor Cisco
Product Cisco Email Security Appliance (ESA)
Weakness CWE-20 · Input validation
Published September 23, 2020
Last update November 13, 2024

CVSS base score

5.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

What the vulnerability does

01Description

A vulnerability in the email message scanning of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass configured filters on the device. The vulnerability is due to improper validation of incoming emails. An attacker could exploit this vulnerability by sending a crafted email message to a recipient protected by the ESA. A successful exploit could allow the attacker to bypass the configured content filters, which could allow malicious content to pass through the device.

Key dates

02Disclosure timeline

September 23, 2020 CVE published
November 13, 2024 Record updated