Vulnerability · Published Jul 20, 2025 · Assigned by VulDB
CVE-2025-7912TOTOLINK T6 MQTT Service recvSlaveUpgstatus 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, which was classified as critical, has been found in TOTOLINK T6 4.1.5cu.748_B20211015. This issue affects the function recvSlaveUpgstatus of the component MQTT Service. The manipulation of the argument s leads to buffer overflow. The attack may be initiated 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-317027 | TOTOLINK T6 MQTT Service recvSlaveUpgstatus buffer overflow vdb-entry, technical-description
- VDB-317027 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
- Submit #618655 | TOTOLINK T6 V4.1.5cu.748_B20211015 Buffer Overflow third-party-advisory
- https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/6.md related
- https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/6.md#poc exploit
- https://www.totolink.net/ product