Vulnerability · Published Jun 4, 2025 · Assigned by VulDB

CVE-2025-5600TOTOLINK EX1200T cstecgi.cgi setLanguageCfg stack-based overflow

Critical 9.8

In plain English

A critical-severity stack buffer overflow in EX1200T from TOTOLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 71% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)1.3%top 28.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability, which was classified as critical, has been found in TOTOLINK EX1200T 4.1.2cu.5232_B20210713. This issue affects the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument LangType leads to stack-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

Affected products (as reported)

Vendor	Product	Versions
TOTOLINK	EX1200T	4.1.2cu.5232_B20210713

Weakness: CWE-121, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

VDB-311087 | TOTOLINK EX1200T cstecgi.cgi setLanguageCfg stack-based overflow vdb-entry, technical-description
VDB-311087 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #588075 | TOTOLINK EX1200T V4.1.2cu.5232_B20210713 Stack-based Buffer Overflow third-party-advisory
https://kn0sinna.notion.site/TOTOLINK-EX1200T-stack-based-BufferOverflow-vulnerability-204b1876cd6e80709ce8dab4778dce55 exploit
https://www.totolink.net/ product