CVE-2025-61739 Johnson Controls IQ Panels2, 2+, IQHub, IQPanel 4, PowerG reusing a nonce, key pair in encryption

High 7.2 Published Updated

Attackers can decrypt captured packets or perform replay attacks due to nonce and key pair reuse in Johnson Controls security panels.

Exploited in the wild
Not known
Login needed
Not needed
Attackable
Local or same network only
Victim action needed
Not needed
Fix
None listed

What is CVE-2025-61739?

CVE-2025-61739 is a high-severity vulnerability in Johnson Controls IQ Panels2, 2+, IQHub, IQPanel 4, PowerG, published on 22 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Due to Nonce reuse, attackers can perform reply attack or decrypt captured packets.

Weakness: CWE-323

Which versions are affected by CVE-2025-61739?

How do I fix CVE-2025-61739?

No fix has been published for CVE-2025-61739 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-61739 being exploited?

There is no known exploitation of CVE-2025-61739 in the wild and no public exploit code.

Sources

Also known as GHSA-6635-2fcv-crph.

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