Vulnerability · Published May 10, 2025 · Assigned by VulDB

CVE-2025-4496TOTOLINK T10/A3100R/A950RG/A800R/N600R/A3000RU/A810R cstecgi.cgi CloudACMunualUpdate buffer overflow

High 8.8

In plain English

A high-severity buffer overflow in A3000RU from TOTOLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 69% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)1.2%top 30.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241_B20210927. It has been declared as critical. This vulnerability affects the function CloudACMunualUpdate of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument FileName 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.5241_B20210927
TOTOLINK	A3100R	4.1.8cu.5241_B20210927
TOTOLINK	A950RG	4.1.8cu.5241_B20210927
TOTOLINK	A800R	4.1.8cu.5241_B20210927
TOTOLINK	N600R	4.1.8cu.5241_B20210927
TOTOLINK	A3000RU	4.1.8cu.5241_B20210927
TOTOLINK	A810R	4.1.8cu.5241_B20210927

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

References

VDB-308212 | TOTOLINK T10/A3100R/A950RG/A800R/N600R/A3000RU/A810R cstecgi.cgi CloudACMunualUpdate buffer overflow vdb-entry, technical-description
VDB-308212 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #567081 | TOTOLINK T10/A3100R/A950RG/A800R/N600R/A3000RU/A810R V4.1.8cu.5241_B20210927 Buffer Overflow third-party-advisory
https://github.com/CH13hh/tmp_store_cc/blob/main/tt/ta/1.md exploit
https://www.totolink.net/ product