CVE-2026-15544 Shibby CVE debrief

Who should care

Users of Shibby Tomato up to version 1.28.0000 should be aware of this vulnerability and take necessary actions to mitigate the risk. This includes administrators, security teams, and operators responsible for maintaining and securing systems that use Shibby Tomato. Additionally, users of FreshTomato may want to verify if they are affected by this vulnerability or if their systems are properly patched.

Technical summary

The vulnerability is caused by a stack-based buffer overflow in the getupsvar function of the tomatodata.cgi file in the apcupsd component of Shibby Tomato. This can be exploited remotely, potentially allowing attackers to execute arbitrary code or cause a denial of service. The CVSS score is 7.4, indicating a high severity. It is essential to patch or mitigate this vulnerability as soon as possible.

Defensive priority

High priority should be given to patching or mitigating this vulnerability, as it can be exploited remotely and has a high CVSS score.

Recommended defensive actions

• Patch or upgrade to a non-vulnerable version of Shibby Tomato or FreshTomato
• Restrict access to the affected component
• Monitor for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-07-13T08:16:21.150Z and has not been modified since then. The NVD entry is currently in the 'Received' status. This information is based on the provided source corpus. Further verification is recommended to confirm the accuracy of this information.

Official resources