CVE-2025-26379
Unknown Unknown - Not Provided
Weak PRNG in PowerG Encryption Allows Packet Injection

Publication date: 2025-12-22

Last updated on: 2025-12-22

Assigner: Johnson Controls

Description
Use of a weak pseudo-random number generator, which may allow an attacker to read or inject encrypted PowerG packets.
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Meta Information
Published
2025-12-22
Last Modified
2025-12-22
Generated
2026-06-16
AI Q&A
2025-12-23
EPSS Evaluated
2026-06-14
NVD
CVE-2025-26379
EUVD
EUVD-2025-204711
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
johnson_controls building_management_systems 4.0
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-338 The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.
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Executive Summary

This vulnerability involves the use of a weak pseudo-random number generator in the encryption of PowerG packets. Because the random number generator is weak, an attacker may be able to predict or reproduce the encryption keys, allowing them to read or inject encrypted PowerG packets.

Impact Analysis

The vulnerability can allow an attacker to intercept and read encrypted PowerG packets or inject malicious packets into the communication. This can lead to unauthorized access, data manipulation, or disruption of services relying on PowerG communications.

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