Multiple Out-of-Bounds Reads in Frame Processing

published 2026-10-26 14 d ago modified 2026-11-02 6 d ago also EUVD-2026-109681

cvss: 7.1; 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 6%
public exploits: 0; none known

SOEM version 2.0.0 and earlier contains multiple vulnerabilities in frame processing where a malicious device can cause the master to read data outside allocated buffers. The software uses length and offset values from device messages without validating them against buffer sizes. This can cause the master to access invalid memory locations, potentially disclosing sensitive information or causing crashes.

Patch / fix

fixed in 1

RT-Labs AB SOEM 2.0.1

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 6 d ago (2026-11-02)

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.1	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L

Affected products

RT-Labs AB SOEM

Classification

Weakness

CWE-125 Out-of-bounds Read
CWE-787 Out-of-bounds Write
CWE-191 Integer Underflow (Wrap or Wraparound)
CWE-129 Improper Validation of Array Index

References

rt-labs.com /wp-content/uploads/2026/10/RRTL-260921-01.pdf
vendor-advisory

Sources

CVE List CVE-2026-82947
NVD CVE-2026-82947

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.

Summary