CVE-2023-20057

MEDIUM

5.3

CVSS Score

Published: January 19, 2023 at 01:32 AM UTC

Updated: June 17, 2026 at 05:29 AM UTC

13 products affected across 1 vendorAsyncosEmail Security Appliance C170Email Security Appliance C690X

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Severity

MEDIUM5.3

Exploit prediction

EPSS 0.7%

Description

A vulnerability in the URL filtering mechanism of Cisco AsyncOS Software for Cisco Email Security Appliance (ESA) could allow an unauthenticated, remote attacker to bypass the URL reputation filters on an affected device. This vulnerability is due to improper processing of URLs. An attacker could exploit this vulnerability by crafting a URL in a particular way. A successful exploit could allow the attacker to bypass the URL reputation filters that are configured for an affected device, which could allow malicious URLs to pass through the device.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Asyncos · Cisco

95%

All versions

cisco-email-security-appliance-c160 (environment) · cisco-email-security-appliance-c170 (environment) · cisco-email-security-appliance-c190 (environment) · cisco-email-security-appliance-c370 (environment) · cisco-email-security-appliance-c370d (environment) · cisco-email-security-appliance-c380 (environment) · cisco-email-security-appliance-c390 (environment) · cisco-email-security-appliance-c670 (environment) · cisco-email-security-appliance-c680 (environment) · cisco-email-security-appliance-c690 (environment) · cisco-email-security-appliance-c690x (environment) · cisco-email-security-appliance-x1070 (environment)

Email Security Appliance C160 · Ciscodevice

80%

All versions

Email Security Appliance C170 · Ciscodevice

80%

All versions

Email Security Appliance C190 · Ciscodevice

80%

All versions

Email Security Appliance C370 · Ciscodevice

80%

All versions