Schneider Electric Harmony STW6 security bypass flaw
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CERT-FR advisory warns a vulnerability in all versions of Schneider Electric Harmony STW6 allows attackers to bypass security policy.
CERT-FR published an advisory describing CVE-2026-96434, a vulnerability affecting all versions of Schneider Electric Harmony STW6. The flaw allows an attacker to cause a security policy bypass. No exploitation in the wild is mentioned in the advisory.
Schneider Electric released security bulletin SEVD-2026-286-01 on 13 October 2026 with further details and patch guidance. Affected organizations, typically in industrial and manufacturing environments where Harmony products are deployed, should consult the vendor bulletin and apply available fixes.
Mentioned in this report
Source reporting: https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-1299
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