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

Published May 10, 2025
·
Updated

A vulnerability was found in TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU and A810R 4.1.8cu.5241B20210927. 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 Software

21 affected components
TOTOLINK T10
TOTOLINK A3100R
TOTOLINK A950RG
TOTOLINK A800R
TOTOLINK N600R
TOTOLINK A3000RU
TOTOLINK A810R
All of the following
TOTOLINK A3000ru Firmware=4.1.8cu.5241_b20210927
TOTOLINK A3000RU
All of the following
TOTOLINK A810r Firmware=4.1.8cu.5241_b20210927
TOTOLINK A810R
All of the following
TOTOLINK T10 Firmware=4.1.8cu.5241_b20210927
TOTOLINK T10
All of the following
TOTOLINK A3100r Firmware=4.1.8cu.5241_b20210927
TOTOLINK A3100R
All of the following
TOTOLINK A950rg Firmware=4.1.8cu.5241_b20210927
TOTOLINK A950RG
All of the following
TOTOLINK A800r Firmware=4.1.8cu.5241_b20210927
TOTOLINK A800R
All of the following
TOTOLINK N600R firmware=4.1.8cu.5241_b20210927
TOTOLINK N600R

Event History

May 10, 2025
CVE Published
via MITRE·05:00 AM
Data Sourced
via MITRE·05:00 AM
DescriptionSeverityWeakness
Data Sourced
via NVD·05:15 AM
DescriptionSeverityWeaknessAffected Software
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Frequently Asked Questions

1

What is the severity of CVE-2025-4496?

CVE-2025-4496 has been declared as critical.

2

How does CVE-2025-4496 affect affected devices?

CVE-2025-4496 affects the function CloudACMunualUpdate in the file /cgi-bin/cstecgi.cgi of the affected TOTOLINK devices.

3

What devices are affected by CVE-2025-4496?

The vulnerable devices include TOTOLINK T10, A3100R, A950RG, A800R, N600R, A3000RU, and A810R.

4

How do I fix CVE-2025-4496?

To fix CVE-2025-4496, it is recommended to update to the latest firmware version provided by TOTOLINK.

5

What type of vulnerability is CVE-2025-4496?

CVE-2025-4496 is a critical vulnerability that allows manipulation of arguments in the CloudACMunualUpdate function.

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