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CVE-2026-79395 – ONVIF Authentication Bypass / Critical Device Takeover – Xiongmai IP Camera XM530 (

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Summary

CVE-2026-79395 is a critical improper-authentication vulnerability (CVSS 9.8) in the ONVIF WS-Security verification logic of the Sofia IPC daemon used in Xiongmai IP Camera XM530 devices. The flaw allows a remote, unauthenticated attacker to bypass ONVIF authentication and invoke privileged camera functions by submitting a crafted SOAP request using the admin account with any arbitrary password, provided the stored admin password is empty. Because Xiongmai-based cameras commonly ship with the admin account’s password left blank, this effectively grants full remote control of exposed devices.

Technical details

  • Root cause: The WS-Security (wsse:UsernameToken) verification routine in the Sofia IPC daemon’s ONVIF Device Service returns authentication success without validating the client-supplied SHA-1 PasswordDigest whenever the account’s stored password is empty.
  • Trigger conditions: The targeted account (typically admin) must have an empty stored password, which is the factory-default configuration on affected devices.
  • Attack vector: Network-based; the attacker sends a crafted SOAP/ONVIF request to the device’s /onvif/device_service endpoint (commonly exposed on ports 80, 8000, or 8899), supplying the admin username with any password value.
  • Impact: Successful exploitation grants access to privileged ONVIF actions, including retrieval of live video/audio stream URLs, PTZ (pan-tilt-zoom) control (ContinuousMove, AbsoluteMove, RelativeMove), device configuration read/modification, and forced system reboot (tds:SystemReboot) — resulting in full compromise of confidentiality, integrity, and availability of the device.

Affected software

  • Xiongmai IP Camera XM530 running Sofia IPC daemon firmware version HMT.CM2005-v220608.1837 and earlier (including at least HMT.CM2005-v210104.1124), which contains this authentication logic. Devices and white-labeled products built on the same Xiongmai/InterVideo Sofia IPC codebase may share the vulnerable component.

Severity

  • CVSS v3.1 Base Score: 9.8 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: Apply a vendor firmware update once released that enforces mandatory validation of the SHA-1 PasswordDigest for all ONVIF actions regardless of stored password state, and that requires a non-empty administrator password to be set at first boot. As of this writing, no fixed firmware version has been confirmed by the vendor.
  • If no patch is available:
    • Immediately set a strong, non-empty password for the admin account on all affected devices.
    • Remove direct internet exposure of the ONVIF device service (/onvif/device_service) and management ports (e.g., 80, 8000, 8899); restrict access to trusted internal networks or via VPN.
    • Place affected cameras behind a firewall or network segmentation that blocks unsolicited inbound SOAP/ONVIF requests from untrusted sources.
    • Monitor device logs for unexpected ONVIF actions such as unauthorized PTZ movement, configuration changes, or reboot events.

References

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