ICS Patch Tuesday: Schneider Electric, Siemens Fix Critical Flaws
September ICS Patch Tuesday brings critical fixes from Schneider Electric, Siemens, and Aveva, including CVSS 9.2 authentication flaw CVE-2026-3869 in Modicon M580 controllers.
Schneider Electric's September advisories include a critical authentication vulnerability, CVE-2026-3869 with a CVSS score of 9.2, in Modicon M580 and Modicon M580 Safety controllers, plus high-severity bugs in PowerLogic T300 and EcoStruxure IT Data Center Expert. Siemens published nine new advisories, four rated critical across Reyrolle 7SR5, Open Interface Services, Industrial Edge Management, and SIMOVE Fleetmanager and SIPLANT, and began rolling out fixes for CVE-2026-31431, a 7.8-rated Linux kernel flaw enabling root shell access. Aveva disclosed four flaws in Pipeline Integrity Monitor's PIMBoards, including a hardcoded encryption key and MD5-hashed passwords, plus an unsafe deserialization issue in Enterprise SCADA. Rockwell Automation separately issued nine advisories covering RSLinx Classic and multiple controller products.
- CVE-2026-3869 (CVSS 9.2): critical authentication flaw in Modicon M580 and M580 Safety controllers
- Siemens issued nine advisories, four critical, and is patching CVE-2026-31431 Linux kernel root flaw
- Aveva PIMBoards flaws include a hardcoded encryption key and MD5 password hashing
- Rockwell Automation published nine advisories covering RSLinx Classic and several controller products
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-31431 | Local Privilege Escalation (Copy Fail) in Linux Kernel algif_aead Interface | 7.8 | 98% | KEVPoC ×12 | KEV |
| CVE-2026-3869 | Flawed Authentication Algorithm in Schneider Electric PLC Enables Full Compromise | 9.2 | — |
From the original article
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AVEVA and Rockwell Automation also released patches for vulnerabilities affecting industrial control system products. The post ICS Patch Tuesday: Schneider Electric, Siemens Fix Critical Flaws appeared first on SecurityWeek.
By Ionut Arghire · securityweek.com
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