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Vulnerability record · CVE-2025-8140 · published 25 July 2025

CVE-2025-8140: Totolink a702r firmware memory buffer overflow vulnerability

TTotolink · A702r Firmware

A vulnerability was found in TOTOLINK A702R 4.0.0-B20230721.1521. It has been declared as critical. This vulnerability affects unknown code of the file /boafrm/formWlanMultipleAP of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

7.4 CVSS 4.0 High EPSS 8.8% · top 5.0% CWE-119 · Memory buffer overflowCWE-120 · Classic buffer overflow
7.4CVSS 4.0 base score, v2 9.0
8.8%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 was found in TOTOLINK A702R 4.0.0-B20230721.1521. It has been declared as critical. This vulnerability affects unknown code of the file /boafrm/formWlanMultipleAP of the component HTTP POST Request Handler. The manipulation of the argument submit-url leads to buffer overflow. The attack can be initiated 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/formWlanMultipleAP.md ExploitThird Party Advisory
https://vuldb.com/?ctiid.317536 Permissions Required
https://vuldb.com/?id.317536 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.620486 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-2025-8140), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.