CVE-2025-61739: Johnson Controls IQ Panels2, 2+, IQHub, IQPanel 4, PowerG · Reusing a Nonce, Key pair in encryption
Affects Johnson Controls IQ Panels2, 2+, IQHub, IQPanel 4, PowerGSource CVE Database V5
Not known to be exploited · CVSS 7.2 High.
Data as of 26 Oct 2026, 10:12 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 8% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:L/SI:L/SA:NExploitation evidence
Disclosed: evidence found.
CVE published 22 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
AI-suggested
- Johnson Controls should prioritize releasing firmware or software updates that enforce unique nonce generation per encryption session to eliminate nonce reuse.
- Until patches are available, organizations should segment networks to isolate IQ Panels and related devices from broader corporate networks, limiting attacker access to adjacent network segments only.
- Implement strict access controls and monitoring on networks hosting these devices to detect anomalous traffic patterns indicative of replay attacks or decryption attempts.
- Employ network encryption and VPNs to protect communications to and from these devices, reducing the risk of packet capture.
- Regularly audit device configurations and logs for signs of tampering or unauthorized access.
- Coordinate with Johnson Controls support for any available interim mitigations or recommended configurations.
- Educate security teams about this vulnerability to ensure rapid detection and response to potential exploitation attempts.
- Consider temporary physical security enhancements to compensate for potential electronic control weaknesses.
Description
Due to Nonce reuse, attackers can perform reply attack or decrypt captured packets.