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SiRcom SMART Alert (SiSA)

Act Now9.1ICS-CERT ICSA-25-329-06Nov 25, 2025
Attack VectorNetwork
Auth RequiredNone
ComplexityLow
User InteractionNone needed
Summary

SiRcom SMART Alert (SiSA) versions 3.0.48 and earlier contain a vulnerability (CWE-306: Missing Authentication for Critical Function) that allows remote attackers to activate or manipulate emergency sirens without authentication. The vulnerability is remotely exploitable over the network with low complexity.

What this means
What could happen
An attacker could remotely trigger emergency sirens or prevent them from operating, causing public alarm, disrupting emergency response operations, or preventing legitimate warnings from reaching communities.
Who's at risk
This affects municipalities and public safety agencies operating SiRcom SMART Alert siren systems. Public warning systems, emergency management centers, and any facility relying on these sirens for emergency alerting are at risk. Loss or manipulation of siren functionality could prevent warnings to the public during natural disasters, severe weather, or civil emergencies.
How it could be exploited
An attacker reaches the SiSA device over the network and sends commands to activate or manipulate sirens. No authentication or credentials are required. The attack succeeds because the device does not validate the source or intent of siren control commands.
Prerequisites
  • Network access to the SiSA device (port and protocol unknown from advisory)
  • Device must be reachable from attacker's network location
  • No credentials or authentication required
Remotely exploitableNo authentication requiredLow complexity attackNo patch availableAffects public safety and emergency alerting systems
Exploitability
Low exploit probability (EPSS 0.2%)
Affected products (1)
ProductAffected VersionsFix Status
SMART Alert (SiSA): 3.0.483.0.48No fix (EOL)
Remediation & Mitigation
0/4
Do now
0/2
HARDENINGRestrict network access to SiSA devices by placing them behind a firewall and blocking inbound connections from the Internet
HARDENINGIsolate SiSA devices on a separate network segment from business networks and administrative systems
Schedule — requires maintenance window
0/2

Patching may require device reboot — plan for process interruption

HARDENINGIf remote access to SiSA is required, deploy a VPN with current security patches and strong authentication
HOTFIXContact SiRcom directly to determine if a firmware patch or workaround is available
View full CISA ICS-CERT advisory
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