Improper input validation in Cisco Asyncos
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
EPSS: 0.011 (62.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.
Affected products
- Cisco Asyncos
- Cisco Email Security Appliance (Esa) — versions n/a
- 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
Weakness classification (CWE)
References
- psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-1534?
- CVE-2021-1534 is a medium-severity vulnerability in Cisco Asyncos, classified under Improper Input Validation. CVSS score: 5.8/10. Published 2021-10-06.
- How severe is CVE-2021-1534?
- Medium severity. CVSS v3 base score is 5.8 out of 10.