CVE-2026-54429

HIGH
7.4
CVSS Score
Published: July 14, 2026 at 09:19 AM UTC
Updated: October 24, 2026 at 09:10 PM UTC
1 product affected across 1 vendorSIMATIC S7 PLCSIM Advanced

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Severity
HIGH7.4
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

Description

A vulnerability has been identified in SIMATIC S7-PLCSIM Advanced (All versions). Affected devices do not properly handle high-volume multicast network traffic, which can exhaust available memory resources in the affected application. This could allow an unauthenticated attacker on the local network segment to cause a denial-of-service condition of the affected application. The affected application becomes inaccessible and requires a manual restart; no project data is lost. Successful exploitation requires a specific project configuration to be already active on the targeted instance.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.4HIGHsiemens
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-770

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