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Fencer Vulns
high 8.8

CVE-2026-82944 json

Buffer Overflow in CoE SDO Upload Multi-Segment Data Transfers

published 2026-10-26 14 d ago modified 2026-11-02 6 d ago also EUVD-2026-109676

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 11%
public exploits
0
none known

Summary

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.

Patch / fix

  • RT-Labs AB SOEM 2.0.1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
6 d ago

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • RT-Labs AB SOEM

Classification

Weakness
  • CWE-787 Out-of-bounds Write
  • CWE-131 Incorrect Calculation of Buffer Size
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.