What’s Vulnerable › Vulnerabilities

CVE-2019-1876: Cisco Wide Area Application Services Software HTTPS Proxy Authentication Bypass Vulnerability

• Severity: medium (CVSS 5.3 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-06-20 · updated 2026-06-17
• Weakness: CWE-306

Description

A vulnerability in the HTTPS proxy feature of Cisco Wide Area Application Services (WAAS) Software could allow an unauthenticated, remote attacker to use the Central Manager as an HTTPS proxy. The vulnerability is due to insufficient authentication of proxy connection requests. An attacker could exploit this vulnerability by sending a malicious HTTPS CONNECT message to the Central Manager. A successful exploit could allow the attacker to access public internet resources that would normally be blocked by corporate policies.

Affected products

• Cisco Wide Area Application Services: 5.5(7), 6.1(1), 6.4(3b)

References

• http://www.securityfocus.com/bid/108863
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190619-waas-authbypass
• http://www.securityfocus.com/bid/108863
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190619-waas-authbypass

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