Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Cisco | Asyncos | < 14.0.1 |
| Cisco | Email Security Appliance C170 | - |
| Cisco | Email Security Appliance C190 | - |
| Cisco | Email Security Appliance C380 | - |
| Cisco | Email Security Appliance C390 | - |
| Cisco | Email Security Appliance C680 | - |
| Cisco | Email Security Appliance C690 | - |
| Cisco | Email Security Appliance C690X | - |
Related Weaknesses (CWE)
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-eVendor Advisory
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-eVendor Advisory
FAQ
What is CVE-2021-1534?
CVE-2021-1534 is a vulnerability with a CVSS score of 5.8 (MEDIUM). 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 fi...
How severe is CVE-2021-1534?
CVE-2021-1534 has been rated MEDIUM with a CVSS base score of 5.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-1534?
Check the references section above for vendor advisories and patch information. Affected products include: Cisco Asyncos, Cisco Email Security Appliance C170, Cisco Email Security Appliance C190, Cisco Email Security Appliance C380, Cisco Email Security Appliance C390.