Vulnerability record · CVE-2025-9781 · published 1 September 2025

CVE-2025-9781: Totolink a702r firmware memory buffer overflow vulnerability

TTotolink · A702r Firmware

A vulnerability has been found in TOTOLINK A702R 4.0.0-B20211108.1423. This affects the function sub_4162DC of the file /boafrm/formFilter. Such manipulation of the argument ip6addr leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

7.4 CVSS 4.0 High EPSS 0.66% · top 49.7% CWE-119 · Memory buffer overflowCWE-120 · Classic buffer overflow

7.4CVSS 4.0 base score, v2 9.0

0.66%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

6References

26 Sep 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

TA702r Firmware Totolink

References

Link	Tags
https://github.com/rew1X/CVE/blob/main/TOTOLINK/A702R/formFilter/formFilter.md	Broken Link
https://github.com/rew1X/CVE/blob/main/TOTOLINK/A702R/formFilter/formFilter.md#poc	Broken Link
https://vuldb.com/?ctiid.322083	Permissions Required
https://vuldb.com/?id.322083	Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.640989	Third Party AdvisoryVDB Entry
https://www.totolink.net/	Product

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-9781), CISA KEV, FIRST EPSS (scores of 2026-10-12). This page is refreshed as NVD updates the record.