Cisco Email Security Appliance URL Filtering Bypass Vulnerability
CVE-2021-1534

5.8MEDIUM

Key Information:

Vendor

Cisco
Status
Cisco Email Security Appliance (esa)
Vendor
CVE Published:
6 October 2021

Badges

👾 Exploit Exists

What is CVE-2021-1534?

A vulnerability in the antispam protection mechanisms 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.

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Affected Version(s)

Cisco Email Security Appliance (ESA)

References

https://tools.cisco.com/security/center/content/CiscoSecu...
vendor-advisoryx_refsource_CISCO

CVSS V3.1

Score:
5.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

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