TOTOLINK A3300R 17.0.0cu.557_B20221024 /cgi-bin/cstecgi.cgi setDdnsCfg buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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8.9$0-$5k0.00

Summaryinfo

A vulnerability classified as critical has been found in TOTOLINK A3300R 17.0.0cu.557_B20221024. This affects the function setDdnsCfg of the file /cgi-bin/cstecgi.cgi. The manipulation leads to buffer overflow. This vulnerability is traded as CVE-2025-12239. It is possible to initiate the attack remotely. Furthermore, there is an exploit available.

Detailsinfo

A vulnerability was found in TOTOLINK A3300R 17.0.0cu.557_B20221024 and classified as critical. This issue affects the function setDdnsCfg of the file /cgi-bin/cstecgi.cgi. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2025-12239. The exploitation is known to be easy. The attack may be initiated remotely. Technical details as well as a public exploit are known.

The exploit is available at github.com. It is declared as proof-of-concept.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-36098). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 9.1
VulDB Meta Temp Score: 8.9

VulDB Base Score: 8.8
VulDB Temp Score: 8.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 9.8
NVD Vector: 🔒

CNA Base Score: 8.8
CNA Vector: 🔒

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/25/2025 Advisory disclosed
10/25/2025 +0 days VulDB entry created
10/27/2025 +2 days VulDB entry last update

Sourcesinfo

Vendor: totolink.net

Advisory: github.com
Status: Not defined

CVE: CVE-2025-12239 (🔒)
GCVE (CVE): GCVE-0-2025-12239
GCVE (VulDB): GCVE-100-329909
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 10/25/2025 19:17
Updated: 10/27/2025 23:35
Changes: 10/25/2025 19:17 (55), 10/27/2025 10:02 (1), 10/27/2025 10:44 (31), 10/27/2025 23:35 (11)
Complete: 🔍
Submitter: yhryhryhr_miemie
Cache ID: 216:3E8:103

Submitinfo

Accepted

  • Submit #673721: TOTOLINK A3300R V17.0.0cu.557_B20221024 Buffer Overflow (by yhryhryhr_miemie)

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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