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CVE-2026-82943— Out-of-Bounds Read via Unchecked Length Values

Quick assessment

Affected

RT-Labs AB SOEM

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

SOEM 2.0.0 及更早版本存在漏洞：恶意设备可发送特制消息，诱导主站读取超出预期缓冲区范围的内存数据。该软件在解析设备响应时，直接使用其中的长度字段，而未将其与实际缓冲区大小进行校验。攻击者可利用此漏洞从主站内存中提取最多 64KB 的数据。

CVSS 6.5 · Medium Updated Oct 26, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

Out-of-Bounds Read via Unchecked Length Values

Source: CVE Program / CVE List V5

Vulnerability Description

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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

跨界内存读

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
RT-Labs AB	SOEM	0 ~ 2.0.1	-

II. Public POCs for CVE-2026-82943

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-82943

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Other References for CVE-2026-82943 (1)

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

https://www.cve.org/CVERecord?id=CVE-2026-82943

Same Patch Batch · RT-Labs AB · 2026-10-26 · 6 CVEs total

CVE-2026-82944	8.8 HIGH	Buffer Overflow in CoE SDO Upload Multi-Segment Data Transfers
CVE-2026-70388	8.3 HIGH	Memory Corruption via Integer Underflow in Message Length Validation
CVE-2026-82947	7.1 HIGH	Multiple Out-of-Bounds Reads in Frame Processing
CVE-2026-82945	6.5 MEDIUM	Memory Corruption via FMMU Configuration Table Overflow
CVE-2026-82946	6.5 MEDIUM	Null Pointer Dereference in Mailbox Error Handling

IV. Related Vulnerabilities

Same product: SOEM

Same vendor: RT-Labs AB

Same weakness: CWE-125