What is CVE-2023-51101?

CVE-2023-51101 is a critical-severity vulnerability in Tenda W9, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-12-26.

How severe is CVE-2023-51101?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Buffer overflow in Tenda W9

CVE-2023-51101

Tenda W9 V1.0.0.7(4456)_CN was discovered to contain a stack overflow via the function formSetUplinkInfo.

Vulnerability class: Buffer Overflow

Published 2023-12-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (51.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Tenda W9
Tenda W9 Firmware — versions 1.0.0.7(4456)_cn, 1.0.0.7\(4456\)_cn

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

github.com/GD008/TENDA/blob/main/W9/W9_setUplinkInfo/W9_setUplinkInfo.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-51101?: CVE-2023-51101 is a critical-severity vulnerability in Tenda W9, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-12-26.
How severe is CVE-2023-51101?: Critical severity. CVSS v3 base score is 9.8 out of 10.