CVE-2026-55366

In IP Multimedia Subsystem, there is a possible authentication bypass due to a logic error in the code. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.

  • Published Sep 15, 2026
  • CVSS 9.8 critical
  • 0.5% chance of exploitation in the next 30 days (EPSS)

Affected software

CVE-2026-55366 at the National Vulnerability Database