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TI-2026-80287 Aliases CVE-2026-82944GHSA-55h8-h3gv-wfcx

Buffer overflow in SOEM CoE SDO multi-segment data transfers

Priority LOW 39CWE-120Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.

Summary

RT-Labs SOEM before 2.0.1 mishandles multi-segment CoE SDO upload data transfers, a flaw classified as CWE-120. The software checks the total size only once at the start and does not track the cumulative size as segments arrive. A malicious device can declare a small initial size to pass validation, then send additional segments that write controlled data past the buffer, potentially enabling code execution.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

Description from the CNA

SOEM version 2.0.0 and earlier contains a vulnerability in multi-segment data transfers where a malicious device can overflow memory buffers. The software checks the total size only once at the beginning, but doesn't track the cumulative size as multiple segments arrive. An attacker can declare a small initial size to pass validation, then send additional segments that exceed the allocated buffer. This allows the attacker to write controlled data beyond buffer boundaries, potentially enabling code execution.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0021 11th percentileScored 2026-11-07
Fix Fixed SOEM (RT-Labs AB): 2.0.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
RT-LabsSOEMbefore 2.0.12.0.1Patch availableCNA
  • SOEM VendorRT-Labs Affected before 2.0.1 Fixed in 2.0.1 Patch available CNA

Remediation

Update RT-Labs SOEM to version 2.0.1, which fixes this flaw.

Written with Claude Haiku 5.5 from the sources below · 2026-11-03

  • Fix · CNA SOEM (RT-Labs AB) Fixed in 2.0.1

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    RT-Labs SOEM — rt-labs.com/wp-content/uploads/2026/10/RRTL-260921-01.pdf

    6 records Highest priority Priority LOW 6 LOW

    Other records, highest priority first

    • TI-2026-80282 SOEM Memory Corruption via Integer Underflow in Message Length ValidationPriority LOW 37
    • TI-2026-80300 Out-of-bounds reads in SOEM frame processing expose memoryPriority LOW 30
    • TI-2026-80289 NULL pointer dereference in SOEM mailbox error handlingPriority LOW 28
    Show all 6 records → Advisory →

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-82944
  2. 2026-10-26 Priority changed: MEDIUM → LOW
  3. 2026-10-27 Alias added: GHSA-55h8-h3gv-wfcx
  4. 2026-11-02 CISA SSVC decision points changed

References

Advisory 1

  • TI-2026-82626 Out-of-bounds write when parsing AR Vendor Block requests in RT-Labs P-Net CVSS 4.0CRITICAL 9.3
  • TI-2026-82632 Resource exhaustion from RPC sessions kept for unknown interface requests CVSS 4.0HIGH 8.7
  • TI-2026-82630 NULL pointer dereference in RT-Labs P-Net on implicit read requests CVSS 4.0HIGH 8.7
  • TI-2026-82627 NULL pointer dereference in P-Net lets remote attackers crash devices CVSS 4.0HIGH 8.7
  • TI-2026-82625 Infinite loop in RT-Labs P-Net PDPortDataCheck record handling CVSS 4.0HIGH 8.7
  • TI-2025-23482 Out-of-bounds write in RT-Labs P-Net CVSS 3.1CRITICAL 9.8
See all 28 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences