Vulnerability · Published Jun 9, 2025 · Assigned by VulDB

CVE-2025-5901TOTOLINK T10 POST Request cstecgi.cgi UploadCustomModule buffer overflow

High 8.8

In plain English

A high-severity buffer overflow in T10 from TOTOLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 6.9% (higher than 94% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)6.9%top 5.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability has been found in TOTOLINK T10 4.1.8cu.5207 and classified as critical. This vulnerability affects the function UploadCustomModule of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. The manipulation of the argument File leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Affected products (as reported)

Vendor	Product	Versions
TOTOLINK	T10	4.1.8cu.5207

Weakness: CWE-120, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-311674 | TOTOLINK T10 POST Request cstecgi.cgi UploadCustomModule buffer overflow vdb-entry, technical-description
VDB-311674 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #592243 | TOTOLINK T10 V2_Firmware V2_V4.1.8cu.5207 Buffer Overflow third-party-advisory
https://candle-throne-f75.notion.site/TOTOLINK-T10-UploadCustomModule-20bdf0aa118580d59961cd545582c118 exploit
https://www.totolink.net/ product