CVE-2025-12239 - CVE House
Back to Database
Status published High CVE-2025-12239

TOTOLINK A3300R cstecgi.cgi setDdnsCfg buffer overflow

Vulnerability Description

A weakness has been identified in TOTOLINK A3300R 17.0.0cu.557_B20221024. The impacted element is the function setDdnsCfg of the file /cgi-bin/cstecgi.cgi. Executing manipulation can lead to buffer overflow. The attack may be performed from remote. The exploit has been made available to the public and could be exploited.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2025-12239

Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • yhryhryhr_miemie (VulDB User)

References

More from TOTOLINK

View All →
CVE-2025-9935
TOTOLINK N600R cstecgi.cgi sub_4159F8 command injection
Medium 6.9
CVE-2025-9934
TOTOLINK X5000R cstecgi.cgi sub_410C34 command injection
Medium 5.3
CVE-2025-9783
TOTOLINK A702R formParentControl sub_418030 buffer overflow
High 8.7
CVE-2025-9782
TOTOLINK A702R formOneKeyAccessButton sub_4466F8 buffer overflow
High 8.7
CVE-2025-9781
TOTOLINK A702R formFilter sub_4162DC buffer overflow
High 8.7

Affected Vendor

Affected Software

A3300R
Vulnerable Versions:
17.0.0cu.557_B20221024

Timeline

Official Publish: October 27th, 2025
Last Modified: October 27th, 2025
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

Weaknesses (CWE)

CWE-120 CWE-119

MITRE ATT&CK TTPs

T1203 Exploitation for Client Execution
Execution
T1068 Exploitation for Privilege Escalation
Privilege Escalation
T1055 Process Injection
Defense Evasion
T1105 Ingress Tool Transfer
Command and Control