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Critical severity · published May 10, 2025
CVE-2025-4496
TOTOLINK T10/A3100R/A950RG/A800R/N600R/A3000RU/A810R cstecgi.cgi CloudACMunualUpdate buffer overflow
9.8
CVSS
1.2%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 69% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
A3
A3000RU · TOTOLINK
4.1.8cu.5241_B20210927 · source: vendor
A3
A3100R · TOTOLINK
4.1.8cu.5241_B20210927 · source: vendor
A8
A800R · TOTOLINK
4.1.8cu.5241_B20210927 · source: vendor
A8
A810R · TOTOLINK
4.1.8cu.5241_B20210927 · source: vendor
A9
A950RG · TOTOLINK
4.1.8cu.5241_B20210927 · source: vendor
N6
N600R · TOTOLINK
4.1.8cu.5241_B20210927 · source: vendor
T1
T10 · TOTOLINK
4.1.8cu.5241_B20210927 · source: vendor
AF
A3000ru Firmware · Totolink
4.1.8cu.5241_b20210927 · source: NVD
AF
A3100r Firmware · Totolink
4.1.8cu.5241_b20210927 · source: NVD
AF
A800r Firmware · Totolink
4.1.8cu.5241_b20210927 · source: NVD
AF
A810r Firmware · Totolink
4.1.8cu.5241_b20210927 · source: NVD
AF
A950rg Firmware · Totolink
4.1.8cu.5241_b20210927 · source: NVD
Affected product
A3
A3000RU
TOTOLINK
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-4496
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-4496
Broken Link
https://github.com/CH13hh/tmp_store_cc/blob/main/tt/ta/1.md
Permissions Required
https://vuldb.com/?ctiid.308212
Third Party Advisory
https://vuldb.com/?id.308212
Third Party Advisory
https://vuldb.com/?submit.567081
Product
https://www.totolink.net/
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