What is CVE-2023-51135?

CVE-2023-51135 is a critical-severity vulnerability in Totolink X2000r, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-12-30.

How severe is CVE-2023-51135?

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

Buffer overflow in Totolink X2000r

CVE-2023-51135

TOTOLINK X2000R Gh v1.0.0-B20230221.0948.web was discovered to contain a stack overflow via the function formPasswordSetup.

Vulnerability class: Buffer Overflow

Published 2023-12-30 · 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: 0.006 (48.8th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 48.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

Totolink X2000r
Totolink X2000r Firmware — versions 1.0.0-b20230221.0948.web

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

References

totolink.cn/home/menu/detail.html (Vendor Advisory)
github.com/XYIYM/Digging/blob/main/TOTOLINK/X2000R/29/1.md (Third Party Advisory)

Frequently asked questions

What is CVE-2023-51135?: CVE-2023-51135 is a critical-severity vulnerability in Totolink X2000r, classified under Out-of-bounds Write. CVSS score: 9.8/10. Published 2023-12-30.
How severe is CVE-2023-51135?: Critical severity. CVSS v3 base score is 9.8 out of 10.