CVE-2015-4288: The LDAP implementation on the Cisco Web Security Appliance (WSA) 8.5.0-000, Email Security Appliance (ESA)...

Security readout for executives and security teams

Certain Cisco security appliances did not properly verify LDAP server certificates when using SSL. An attacker able to intercept that LDAP connection could impersonate the directory server and capture sensitive information. The public bundle does not provide CVSS scoring or confirmed in-the-wild exploitation. Exposure is most likely where the listed Cisco appliance versions are configured to use LDAP over SSL. Internet exposure alone is not the main indicator; the attacker needs a position where they can intercept or influence appliance-to-LDAP traffic. Treat as a targeted confidentiality risk for affected Cisco security appliances using LDAP SSL. Prioritize validation in environments where directory traffic carries sensitive credentials or identity data, then follow Cisco remediation guidance. Mitigation focus: Review Cisco advisory 40137 for affected software and fixed release guidance.; Upgrade only according to Cisco’s official corrected-release instructions.; Identify appliances running WSA 8.5.0-000, ESA 8.5.7-042, or SMA 8.3.6-048..

Prepared

Jun 13, 2026, 22:22 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.