Vulnerability · Published Jul 19, 2025 · Assigned by VulDB
CVE-2025-7837TOTOLINK T6 MQTT Service recvSlaveStaInfo buffer overflow
High 8.8
In plain English
A high-severity buffer overflow in T6 from TOTOLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.3% (higher than 70% of all known vulnerabilities).
Severity (CVSS 3.1)8.8High
Exploit odds (30 days)1.3%top 29.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
A vulnerability was found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical. Affected by this issue is the function recvSlaveStaInfo of the component MQTT Service. The manipulation of the argument dest leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.
Affected products (as reported)
Weakness: CWE-120, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R
References
- VDB-316940 | TOTOLINK T6 MQTT Service recvSlaveStaInfo buffer overflow vdb-entry, technical-description
- VDB-316940 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #617572 | TOTOLINK T6 V4.1.5cu.748_B20211015 Buffer Overflow third-party-advisory
- https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/4.md related
- https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/4.md#poc exploit
- https://www.totolink.net/ product