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TI-2026-80286 Aliases CVE-2026-82943GHSA-2h24-jp9f-47qx

Out-of-bounds read in SOEM lets malicious devices leak memory

Priority LOW 28CWE-125Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

RT-Labs AB SOEM before 2.0.1 uses length values from device responses without checking them against actual buffer sizes, which causes an out-of-bounds read (CWE-125). A malicious device on the adjacent network can send messages that make the master read beyond its buffer. The attacker needs no privileges or user interaction and can extract up to 64KB of the master's memory.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

SOEM version 2.0.0 and earlier contains vulnerabilities where a malicious device can send messages that cause the master to read data from memory locations beyond the intended buffer. The software uses length values from device responses without validating them against actual buffer sizes. An attacker can exploit this to extract up to 64KB of data from the master's memory.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00167 5th 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
Partial

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 AB SOEM to version 2.0.1, the fixed version.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • 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-2026-80287 Buffer overflow in SOEM CoE SDO multi-segment data transfersPriority LOW 39
    • 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
    Show all 6 records → Advisory →

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-82943
  2. 2026-10-26 CISA SSVC decision points changed
  3. 2026-10-26 Priority changed: MEDIUM → LOW
  4. 2026-10-27 Alias added: GHSA-2h24-jp9f-47qx

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