CVE-2025-3873 json
Buffer overflow in Si91x crypto APIs
published 2025-07-25 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-22724
- cvss
- 6.0
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 29%
- public exploits
- 0
- none known
Summary
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
Patch / fix
- silabs.com WiseConnect 3.4.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 15 mo ago
Exploit prediction
0.35% chance of exploitation in the next 30 days, higher than 29% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.0 | 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 |
| CNA | 4.0 | 6.0 | 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- silabs.com WiseConnect
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
community.silabs.com
/068Vm00000SSlOu
vendor-advisory, permissions-required
-
docs.silabs.com
/wiseconnect/latest/sisdk-wifi-release-notes/
release-notes
Sources
- CVE List CVE-2025-3873
- NVD CVE-2025-3873
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.