CVE-2026-44103: JupiCore does not perform validation of firmware

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-30 · updated 2026-07-30
Weakness: CWE-434

Description

An unauthenticated remote attacker can inject malicious firmware into the internal charging module because the JupiCore service transmits firmware updates without performing integrity or verification check. Successful exploitation may compromise the integrity of the affected device. This vulnerability could be used in chain with CVE-2026-44104.

Affected products

Phoenix Contact CHARX SEC-3000: from 1.0.0 before 1.9.1 — fixed in 1.9.1
Phoenix Contact CHARX SEC-3050: from 1.0.0 before 1.9.1 — fixed in 1.9.1
Phoenix Contact CHARX SEC-3100: from 1.0.0 before 1.9.1 — fixed in 1.9.1
Phoenix Contact CHARX SEC-3150: from 1.0.0 before 1.9.1 — fixed in 1.9.1

How to fix

Upgrade to a fixed version: Phoenix Contact CHARX SEC-3000 1.9.1; Phoenix Contact CHARX SEC-3050 1.9.1; Phoenix Contact CHARX SEC-3100 1.9.1; Phoenix Contact CHARX SEC-3150 1.9.1. Check the vendor advisory for mitigations.

References

https://www.certvde.com/en/advisories/VDE-2026-008/

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