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CVE-2025-12239 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CNA: [email protected]CVSS-B:8.8 HIGHVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/noahze01/IoT-vulnerable/blob/main/TOTOLink/A3300R/setDdnsCfg.md	[email protected]	ExploitThird Party Advisory
https://vuldb.com/?ctiid.329909	[email protected]	Permissions RequiredVDB Entry
https://vuldb.com/?id.329909	[email protected]	Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.673721	[email protected]	Third Party AdvisoryVDB Entry
https://www.totolink.net/	[email protected]	Product

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-120	Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')	[email protected]
CWE-119	Improper Restriction of Operations within the Bounds of a Memory Buffer	[email protected]
CWE-120	Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')	[email protected]

Affected Products

Product	Versions
totolink a3300r firmware	17.0.0cu.557_b20221024
CPE cpe:2.3:o:totolink:a3300r_firmware:17.0.0cu.557_b20221024:::::::* Remediation No remediation found in references.
totolink a3300r	All versions
CPE cpe:2.3:h:totolink:a3300r:-:::::::* Remediation No remediation found in references.

Change History

4 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Oct 27, 2025	Initial Analysis	[email protected]
Oct 27, 2025	New CVE Received	[email protected]