Vulnerability · Published Jul 25, 2025 · Assigned by Silabs
CVE-2025-3873Buffer overflow in Si91x crypto APIs
Medium 6.0
In plain English
A medium-severity out-of-bounds write in WiseConnect from silabs.com. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).
Severity (CVSS 4.0)6.0Medium
Exploit odds (30 days)0.4%top 71.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
The following APIs for the Silcon Labs SiWx91x prior to vesion 3.4.0 failed to check the size of the output buffer of the caller which could lead to data corruption on the host (Cortex-M4) application. sl_si91x_aes sl_si91x_gcm sl_si91x_ccm sl_si91x_sha
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| silabs.com | WiseConnect | 3.0.0 – before 3.4.0 |
Weakness: CWE-787 · Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:H/VA:N/SC:N/SI:N/SA:N
References
- https://docs.silabs.com/wiseconnect/latest/sisdk-wifi-release-notes/ release-notes
- https://community.silabs.com/068Vm00000SSlOu vendor-advisory, permissions-required