CVE-2025-14547Network attack vector

Device crash via EC-JPAKE ZKP parsing underflow

Published Feb 20, 2026 · Updated Feb 20, 2026

Integer underflow in Gecko SDK 2.5.x and earlier and Simplicity SDK 2025.6.2 and earlier allows remote authenticated users to crash devices. The PSA Crypto and SE Manager EC-JPAKE APIs underflow an integer while parsing a zero-knowledge proof; Silicon Labs has not disclosed the specific arithmetic operation. A network request must reach the parser under the required protocol condition, and successful triggering temporarily interrupts the affected device without reported data disclosure or modification.

CVSS severity2.3
Low
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer underflow in Gecko SDK 2.5.x and earlier and Simplicity SDK 2025.6.2 and earlier allows remote authenticated users to crash devices. The PSA Crypto and SE Manager EC-JPAKE APIs underflow an integer while parsing a zero-knowledge proof; Silicon Labs has not disclosed the specific arithmetic operation. A network request must reach the parser under the required protocol condition, and successful triggering temporarily interrupts the affected device without reported data disclosure or modification.

The record

CVE
CVE-2025-14547
Published
Feb 20, 2026
Updated
Feb 20, 2026
Vendor
Sigma Designs
Product
Gecko SDK
Classifications
CWE-191, CAPEC-128, T1499.004
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 20, 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.

  1. Affected versionversion=0 <=2.5.x

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Sigma Designs · Gecko SDKversion=0 <=2.5.x
Sigma Designs · Simplicity SDKversion=0 <=2025.6.2

Published CVSS scores

2.3Silicon LabsCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-191Integer Underflow (Wrap or Wraparound)
CAPEC-128Integer Attacks
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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