CVE-2026-76476: Improper Input Validation in Cisco Cisco Emergency Responder

CVE-2026-76476 involves improper input validation in Cisco Emergency Responder, which could allow an attacker with low privileges to cause a high impact on confidentiality, integrity, and availability. This vulnerability was discovered during Cisco's internal security review and is part of multiple vulnerabilities addressed by software hardening releases. The affected versions include a range of 14.x and 15.x releases and their service updates, as explicitly listed. The CVSS vector indicates network attack vector, low attack complexity, privileges required, no user interaction, and high impact on all security properties.

Successful exploitation of this vulnerability could lead to complete compromise of confidentiality, integrity, and availability of the affected Cisco Emergency Responder systems. Given the CVSS score of 8.8 and the vector details, an attacker with some privileges could remotely exploit this flaw without user interaction, potentially causing severe operational disruption and data compromise.

Cisco has released software hardening updates that address this vulnerability. Users should apply the official patches or upgrade to fixed versions as provided by Cisco. Since this is not a cloud service, remediation depends on customer action. Patch status is not explicitly stated in the provided data, so users should consult Cisco's official advisory for the latest patch and remediation guidance.