What’s Vulnerable › Vulnerabilities

CVE-2019-1816: Cisco Web Security Appliance Privilege Escalation Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-05-03 · updated 2026-06-17
• Weakness: CWE-20

Description

A vulnerability in the log subscription subsystem of the Cisco Web Security Appliance (WSA) could allow an authenticated, local attacker to perform command injection and elevate privileges to root. The vulnerability is due to insufficient validation of user-supplied input on the web and command-line interface. An attacker could exploit this vulnerability by authenticating to the affected device and injecting scripting commands in the scope of the log subscription subsystem. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system and elevate privileges to root.

Affected products

• Cisco Web Security Appliance (WSA): 10.5.2-072, 11.0.0-641, 11.5.0-fcs-614, wsa10.5.0-fcs-000

References

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-wsa-privesc
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190501-wsa-privesc

Get alerted when CVE-2019-1816 or the next vulnerability affects your stack