Predictable random values via power-save timing limits
Published May 14, 2026 · Updated May 14, 2026
Weak randomness in Silicon Labs WiSeConnect SDK 2.13.1 and earlier allows physically proximate attackers to predict HRNG output under power save. The RS9116 hardware random-number generator operates under timing limits in power-save mode and returns predictable values instead of adequate entropy. Power save must be enabled; the public advisory does not disclose the timing sequence or downstream security operation required to convert prediction into confidentiality or integrity loss.
Summary
What happened
Weak randomness in Silicon Labs WiSeConnect SDK 2.13.1 and earlier allows physically proximate attackers to predict HRNG output under power save. The RS9116 hardware random-number generator operates under timing limits in power-save mode and returns predictable values instead of adequate entropy. Power save must be enabled; the public advisory does not disclose the timing sequence or downstream security operation required to convert prediction into confidentiality or integrity loss.
The record
- CVE
- CVE-2026-3290
- Published
- May 14, 2026
- Updated
- May 14, 2026
- Vendor
- Sigma Designs
- Product
- WiSeConnect SDK
- Classifications
- CWE-332, CAPEC-122
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 14, 2026CVE publishedPublication date reported by the CVE source.
- May 14, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=2.13.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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