PT-2025-43895 · Totolink · Totolink A3300R

Yhryhryhr_Miemie · Published 2025-10-12 · Updated 2025-10-28 · CVE-2025-12239

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions TOTOLINK A3300R version 17.0.0cu.557 B20221024

Description A weakness exists in TOTOLINK A3300R. The issue is related to a buffer overflow in the setDdnsCfg function within the /cgi-bin/cstecgi.cgi file. This can be exploited remotely. The exploit has been made publicly available.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

DoS

RCE

Buffer Overflow

Weakness Enumeration

CWE-119

CWE-120

Related Identifiers

BDU:2025-13499

CVE-2025-12239

Affected Products

Totolink A3300R

References · 11

• 🔥 https://github.com/noahze01/IoT-vulnerable/blob/main/TOTOLink/A3300R/setDdnsCfg.md · Exploit
• https://osv.dev/vulnerability/CVE-2025-12239 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-13499 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-12239 · Security Note
• https://vuldb.com/?submit.673721 · Note
• https://twitter.com/CveTodo/status/1983079850165334116 · Twitter Post
• https://vuldb.com/?id.329909 · Note
• https://t.me/cveNotify/140404 · Telegram Post
• https://vuldb.com/?ctiid.329909 · Note
• https://totolink.net · Note
• https://t.me/CVEtracker/35798 · Telegram Post