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Vulnerability record · CVE-2025-8136 · published 25 July 2025

CVE-2025-8136: Totolink a702r firmware memory buffer overflow vulnerability

TTotolink · A702r Firmware

A vulnerability, which was classified as critical, was found in TOTOLINK A702R 4.0.0-B20230721.1521. Affected is an unknown function of the file /boafrm/formFilter of the component HTTP POST Request Handler. The manipulation of the argument ip6addr leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

7.4 CVSS 4.0 High EPSS 1.1% · top 36.7% CWE-119 · Memory buffer overflowCWE-120 · Classic buffer overflow
7.4CVSS 4.0 base score, v2 9.0
1.1%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

A vulnerability, which was classified as critical, was found in TOTOLINK A702R 4.0.0-B20230721.1521. Affected is an unknown function of the file /boafrm/formFilter of the component HTTP POST Request Handler. The manipulation of the argument ip6addr leads to buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used.

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.

References

LinkTags
https://github.com/panda666-888/vuls/blob/main/totolink/a702r/formFilter.md ExploitThird Party Advisory
https://vuldb.com/?ctiid.317532 Permissions RequiredVDB Entry
https://vuldb.com/?id.317532 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.620482 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.

9.8CVE-2019-19825Totolink a3002ru firmware improper authentication vulnerabilityOn certain TOTOLINK Realtek SDK based routers, the CAPTCHA text can be retrieved via an {"topicurl":"setting/getSanvas"} POST to the boafrm/formLogin…EPSS 30%8.8CVE-2019-19824Totolink a3002ru firmware os command injection vulnerabilityOn certain TOTOLINK Realtek SDK based routers, an authenticated attacker may execute arbitrary OS commands via the sysCmd parameter to the boafrm/for…EPSS 25%8.7CVE-2025-4835Totolink a702r firmware memory buffer overflow vulnerabilityA vulnerability was found in TOTOLINK A702R, A3002R and A3002RU 3.0.0-B20230809.1615. It has been declared as critical. Affected by this vulnerabilit…EPSS 0.81%8.7CVE-2025-4834Totolink a702r firmware memory buffer overflow vulnerabilityA vulnerability was found in TOTOLINK A702R, A3002R and A3002RU 3.0.0-B20230809.1615. It has been classified as critical. Affected is an unknown func…EPSS 0.81%8.7CVE-2025-4833Totolink a702r firmware memory buffer overflow vulnerabilityA vulnerability was found in TOTOLINK A702R, A3002R and A3002RU 3.0.0-B20230809.1615 and classified as critical. This issue affects some unknown proc…EPSS 0.81%8.7CVE-2025-4831Totolink a702r firmware memory buffer overflow vulnerabilityA vulnerability, which was classified as critical, was found in TOTOLINK A702R, A3002R and A3002RU 3.0.0-B20230809.1615. This affects an unknown part…EPSS 0.81%8.7CVE-2025-4832Totolink a702r firmware memory buffer overflow vulnerabilityA vulnerability has been found in TOTOLINK A702R, A3002R and A3002RU 3.0.0-B20230809.1615 and classified as critical. This vulnerability affects unkn…EPSS 0.81%8.7CVE-2025-4830Totolink a702r firmware memory buffer overflow vulnerabilityA vulnerability, which was classified as critical, has been found in TOTOLINK A702R, A3002R and A3002RU 3.0.0-B20230809.1615. Affected by this issue …EPSS 0.81%

Source: NIST National Vulnerability Database (record CVE-2025-8136), CISA KEV, FIRST EPSS (scores of 2026-10-10). This page is refreshed as NVD updates the record.