Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2025-4496

Severity CVSS v4.0:
HIGH
Type:
CWE-119 Buffer Errors
Publication date:
10/05/2025
Last modified:
29/07/2025

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.

Impact

Vector 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS v4.0 Severity and Metrics:

Base Score: 8.70 HIGH
Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Attack Vector (AV): Network
Attack Complexity (AC): Low
Attack Requirements (AT): None
Privileges Required (PR): Low
User Interaction (UI): None
Confidentiality (VC): High
Integrity (VI): High
Availability (VA): High
Confidentiality (SC): None
Integrity (SI): None
Availability (SA): None

Base Score 4.0
8.70
Severity 4.0
HIGH
Vector 3.x
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.80 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
8.80
Severity 3.x
HIGH
Vector 2.0
AV:N/AC:L/Au:S/C:C/I:C/A:C CVSS v2.0 Severity and Metrics:

Base Score: 9.00 HIGH
Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): Single
Confidentiality (C): Complete
Integrity (I): Complete
Availability (A): Complete

Base Score 2.0
9.00
Severity 2.0
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:totolink:a3000ru_firmware:4.1.8cu.5241_b20210927:*:*:*:*:*:*:*
cpe:2.3:h:totolink:a3000ru:-:*:*:*:*:*:*:*
cpe:2.3:o:totolink:a810r_firmware:4.1.8cu.5241_b20210927:*:*:*:*:*:*:*
cpe:2.3:h:totolink:a810r:-:*:*:*:*:*:*:*
cpe:2.3:o:totolink:t10_firmware:4.1.8cu.5241_b20210927:*:*:*:*:*:*:*
cpe:2.3:h:totolink:t10:-:*:*:*:*:*:*:*
cpe:2.3:o:totolink:a3100r_firmware:4.1.8cu.5241_b20210927:*:*:*:*:*:*:*
cpe:2.3:h:totolink:a3100r:-:*:*:*:*:*:*:*
cpe:2.3:o:totolink:a950rg_firmware:4.1.8cu.5241_b20210927:*:*:*:*:*:*:*
cpe:2.3:h:totolink:a950rg:-:*:*:*:*:*:*:*
cpe:2.3:o:totolink:a800r_firmware:4.1.8cu.5241_b20210927:*:*:*:*:*:*:*
cpe:2.3:h:totolink:a800r:-:*:*:*:*:*:*:*
cpe:2.3:o:totolink:n600r_firmware:4.1.8cu.5241_b20210927:*:*:*:*:*:*:*
cpe:2.3:h:totolink:n600r:-:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools