CVE-2025-26468 Overview
CVE-2025-26468 is a missing authentication vulnerability affecting the CyberData 011209 SIP Emergency Intercom. The device exposes features that allow unauthenticated network attackers to access functionality and trigger a denial-of-service condition or system disruption. The flaw maps to CWE-306: Missing Authentication for Critical Function and impacts the availability of the device without requiring user interaction or privileges. CISA published the issue under ICS Advisory ICSA-25-155-01, highlighting operational risk for facilities relying on the intercom for emergency communications.
Critical Impact
Unauthenticated network attackers can disrupt or disable CyberData 011209 SIP Emergency Intercom devices, degrading emergency communication capabilities in deployed environments.
Affected Products
- CyberData 011209 SIP Emergency Intercom (all firmware versions referenced in ICSA-25-155-01)
- Deployments using the affected hardware revision identified by cpe:2.3:h:cyberdata:011209_sip_emergency_intercom
- Operating environments running the affected firmware identified by cpe:2.3:o:cyberdata:011209_sip_emergency_intercom
Discovery Timeline
- 2025-06-09 - CVE-2025-26468 published to the National Vulnerability Database
- 2025-06-20 - Last updated in NVD database
Technical Details for CVE-2025-26468
Vulnerability Analysis
The CyberData 011209 SIP Emergency Intercom exposes one or more functional interfaces over the network without requiring authentication. An attacker with network reachability to the device can interact with these exposed features directly. The CWE-306 classification indicates that critical functionality is accessible without identity verification. Because the device serves an emergency-communication role, loss of availability translates directly into operational risk for the surrounding physical environment.
Root Cause
The root cause is the absence of an authentication check on network-exposed device functions. According to the CISA advisory, the intercom does not enforce identity validation before allowing certain operations to be invoked. This design gap permits any reachable client to send requests that the firmware processes as trusted input, leading to a state where the device becomes unresponsive or otherwise disrupted.
Attack Vector
The attack vector is network-based with low complexity. No privileges or user interaction are required. An attacker positioned on the same network segment as the intercom — for example through an exposed management VLAN, flat enterprise LAN, or unsegmented ICS network — can reach the device and issue requests against the unauthenticated interface. Repeated or malformed requests can render the intercom unavailable for legitimate emergency use.
No public proof-of-concept code has been verified for this vulnerability. Refer to the CISA ICS Advisory ICSA-25-155-01 for vendor-supplied technical context.
Detection Methods for CVE-2025-26468
Indicators of Compromise
- Unexpected reboots, service restarts, or unresponsiveness of CyberData 011209 intercom units.
- Inbound connections to the intercom from hosts outside the documented administrative scope.
- Sudden spikes in SIP, HTTP, or management-port traffic directed at intercom IP addresses.
- Loss of SIP registration or heartbeat from the intercom on the call manager or SIP server.
Detection Strategies
- Inventory all CyberData 011209 SIP Emergency Intercom devices and monitor their network reachability and uptime.
- Deploy network detection rules that flag unauthenticated access attempts to intercom management interfaces.
- Correlate device-availability telemetry with network flow data to identify external probing that precedes outages.
Monitoring Recommendations
- Forward SIP server logs, ICS network sensor alerts, and intercom availability metrics into a centralized analytics platform for correlation.
- Alert on any new source IP communicating with the intercom on administrative or SIP signaling ports.
- Monitor for repeated connection resets or malformed requests targeting the intercom, which can indicate active exploitation attempts.
How to Mitigate CVE-2025-26468
Immediate Actions Required
- Apply the firmware update referenced in CISA ICS Advisory ICSA-25-155-01 once available from CyberData.
- Restrict network access to the intercom so that only authorized SIP servers and administrative hosts can reach it.
- Place the device behind a firewall and block direct exposure to the internet or untrusted networks.
- Audit existing network segmentation to confirm the intercom resides in a dedicated VoIP or ICS VLAN.
Patch Information
CyberData remediation guidance is published through the CISA advisory ICSA-25-155-01. Operators should follow the vendor's firmware update procedure and verify the running version after upgrade. No vendor advisory URL beyond the CISA reference is currently listed in NVD for CVE-2025-26468.
Workarounds
- Enforce strict ACLs on switches and firewalls so only the SIP server and approved management workstations can reach the intercom.
- Disable any non-essential services on the device through its administrative console.
- Use a VPN or jump host for any remote administration of the intercom rather than exposing it directly.
- Continuously monitor device availability and treat unexpected outages as potential security incidents until the patch is applied.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
