What is CVE-2023-51035?

CVE-2023-51035 is a critical-severity vulnerability in Totolink Ex1200l, classified under OS Command Injection. CVSS score: 9.8/10. Published 2023-12-22.

How severe is CVE-2023-51035?

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

RCE in Totolink Ex1200l

CVE-2023-51035

TOTOLINK EX1200L V9.3.5u.6146_B20201023 is vulnerable to arbitrary command execution on the cstecgi.cgi NTPSyncWithHost interface.

Vulnerability class: Command Injection (OS Command Injection)

Published 2023-12-22 · 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: 0.013 (69.1th percentile), scored 2026-09-23.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Totolink Ex1200l
Totolink Ex1200l Firmware — versions 9.3.5u.6146_b20201023

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

815yang.github.io/2023/12/12/ex1200l/totolink_ex1200L_NTPSyncWithHost/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2023-51035?: CVE-2023-51035 is a critical-severity vulnerability in Totolink Ex1200l, classified under OS Command Injection. CVSS score: 9.8/10. Published 2023-12-22.
How severe is CVE-2023-51035?: Critical severity. CVSS v3 base score is 9.8 out of 10.