In Silicon Labs uC/TCP-IP 3.6.0, TCP ISNs are improperly random.
Priority MEDIUM 44CWE-330Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
In Silicon Labs uC/TCP-IP 3.6.0, TCP ISNs are improperly random.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01083 65th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:silabs:uc\/tcp-ip:3.6.0:*:*:*:*:*:*:* | 3.6.0 | Vulnerable | silabs.com |
- cpe:2.3:a:silabs:uc\/tcp-ip:3.6.0:*:*:*:*:*:*:* Versions 3.6.0 Vulnerable ·silabs.com
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2020-27630
- 2026-10-03 Alias added: GHSA-g82m-q2g7-55jc
References
Sources
- CVE-2020-27630 · CVE Program
- CVE-2020-27630 · NVD
- FIRST EPSS
- GHSA-g82m-q2g7-55jc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences