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Vulnerability record · CVE-2026-26731 · published 17 February 2026

CVE-2026-26731: Totolink a3002ru firmware out-of-bounds write vulnerability

TTotolink · A3002ru Firmware

TOTOLINK A3002RU V2.1.1-B20211108.1455 was discovered to contain a stack-based buffer overflow via the routernamer`parameter in the formDnsv6 function.

8.8 CVSS 3.1 High EPSS 1.3% · top 30.1% CWE-787 · Out-of-bounds writeCWE-121 · Stack-based buffer overflow
8.8CVSS 3.1 base score
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References, 1 tagged exploit
21 Sep 2026Last modified by NVD

Description

TOTOLINK A3002RU V2.1.1-B20211108.1455 was discovered to contain a stack-based buffer overflow via the routernamer`parameter in the formDnsv6 function.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

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

References

LinkTags
https://github.com/0xmania/cve/tree/main/TOTOLINK-A3002RU-boa-formDnsv6-StackOverflow ExploitThird Party Advisory

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Related vulnerabilities

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

9.8CVE-2024-34198Totolink a3002ru firmware classic buffer overflow vulnerabilityTOTOLINK AC1200 Wireless Router A3002RU V2.1.1-B20230720.1011 is vulnerable to Buffer Overflow. The formWlEncrypt CGI handler in the boa program fail…EPSS 0.66%9.8CVE-2022-35491Totolink a3002ru firmware hard-coded credentials vulnerabilityTOTOLINK A3002RU V3.0.0-B20220304.1804 has a hardcoded password for root in /etc/shadow.sample.EPSS 0.82%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%9.8CVE-2018-13306Totolink a3002ru firmware os command injection vulnerabilitySystem command injection in formDlna in TOTOLINK A3002RU version 1.0.8 allows attackers to execute system commands via the "ftpUser" POST parameter.EPSS 3.2%9.8CVE-2018-13307Totolink a3002ru firmware os command injection vulnerabilitySystem command injection in fromNtp in TOTOLINK A3002RU version 1.0.8 allows attackers to execute system commands via the "ntpServerIp2" POST paramet…EPSS 3.2%9.8CVE-2018-13314Totolink a3002ru firmware os command injection vulnerabilitySystem command injection in formAliasIp in TOTOLINK A3002RU version 1.0.8 allows attackers to execute system commands via the "ipAddr" POST parameter.EPSS 3.2%9.8CVE-2018-13316Totolink a3002ru firmware os command injection vulnerabilitySystem command injection in formAliasIp in TOTOLINK A3002RU version 1.0.8 allows attackers to execute system commands via the "subnet" POST parameter.EPSS 3.2%9.8CVE-2018-13311Totolink a3002ru firmware os command injection vulnerabilitySystem command injection in formDlna in TOTOLINK A3002RU version 1.0.8 allows attackers to execute system commands via the "sambaUser" POST parameter.EPSS 2.5%

Source: NIST National Vulnerability Database (record CVE-2026-26731), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.