Vulnerability · Published Jul 25, 2025 · Assigned by VulDB

CVE-2025-8139TOTOLINK A702R HTTP POST Request formPortFw buffer overflow

High 8.8

In plain English

A high-severity buffer overflow in A702R from TOTOLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 69% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)1.2%top 30.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was found in TOTOLINK A702R 4.0.0-B20230721.1521. It has been classified as critical. This affects an unknown part of the file /boafrm/formPortFw of the component HTTP POST Request Handler. The manipulation of the argument service_type leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used.

Affected products (as reported)

Vendor	Product	Versions
TOTOLINK	A702R	4.0.0-B20230721.1521

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-317535 | TOTOLINK A702R HTTP POST Request formPortFw buffer overflow vdb-entry, technical-description
VDB-317535 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #620485 | TOTOLINK A702R V4.0.0-B20230721.1521 Buffer Overflow third-party-advisory
https://github.com/panda666-888/vuls/blob/main/totolink/a702r/formPortFw.md exploit
https://www.totolink.net/ product