CVE-2026-76475 Cisco CVE debrief

Who should care

Defenders responsible for Cisco Unified Communications products, including administrators and security teams, should assess exposure and apply hardening releases to address the vulnerabilities.

Why it matters

CVE-2026-76475 is a critical vulnerability in Cisco Unified Communications products that requires immediate attention from defenders. The vulnerability allows for cross-site scripting attacks, which could lead to unauthorized access or malicious activity. Defenders should prioritize verifying exposure in their inventory of Cisco Unified Communications products and applying the provided hardening releases to address the vulnerabilities.

• Verify exposure in inventory of Cisco Unified Communications products
• Apply hardening releases to address cross-site scripting vulnerabilities
• Review configurations to ensure proper neutralization of input during web page generation
• Update incident response plans to account for potential cross-site scripting attacks

Technical summary

CVE-2026-76475 is related to improper neutralization of input during web page generation in Cisco Unified Communications products, classified under CWE-79. Affected products include Cisco Emergency Responder, Cisco Unified Communications Manager, Cisco Unified Communications Manager IM & Presence Service, and Cisco Unity Connection. The vulnerability allows for cross-site scripting attacks, which could lead to unauthorized access or malicious activity. Defenders should prioritize verifying exposure in their inventory of Cisco Unified Communications products and applying the provided hardening releases to address the cross-site scripting vulnerabilities.

Defensive priority

Defenders should prioritize verifying exposure in their inventory of Cisco Unified Communications products and applying the provided hardening releases to address the cross-site scripting vulnerabilities.

Recommended defensive actions

• Verify inventory of Cisco Unified Communications products for potential exposure
• Apply provided hardening releases to address cross-site scripting vulnerabilities
• Review and update configurations to ensure proper neutralization of input during web page generation
• Track exceptions and retest remediated assets
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide details on the vulnerabilities and affected products. Specific exploitation details or victim information are not provided. Defenders should verify exposure in their inventory of Cisco Unified Communications products, including Cisco Emergency Responder, Cisco Unified Communications Manager, Cisco Unified Communications Manager IM & Presence Service, and Cisco Unity Connection. The hardening releases address multiple internally discovered vulnerabilities, and defenders should review the supplied

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.