CVE-2026-82946: medium-severity vulnerability in RT-Labs AB SOEM
Null Pointer Dereference in Mailbox Error Handling
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 0.2%
SOEM version 2.0.0 and earlier contains a vulnerability where a malicious device can crash the master system. When the software receives an error response, it clears an internal pointer but continues processing. If another message arrives before timeout, the software attempts to use the cleared pointer, causing a crash. An attacker can trigger this with a simple sequence of two messages.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
RT-Labs AB · SOEMRelated CVEs — RT-Labs AB SOEM
In the same product, most dangerous first.
CVE-2026-70388HIGHMemory Corruption via Integer Underflow in Message Length ValidationEPSS 0.2%CVE-2026-82944HIGHBuffer Overflow in CoE SDO Upload Multi-Segment Data TransfersEPSS 0.2%CVE-2026-82947HIGHMultiple Out-of-Bounds Reads in Frame ProcessingEPSS 0.2%CVE-2026-82945MEDIUMMemory Corruption via FMMU Configuration Table OverflowEPSS 0.2%CVE-2026-82943MEDIUMOut-of-Bounds Read via Unchecked Length ValuesEPSS 0.2%