PT-2026-20357 · Totolink · Totolink A3002Ru

0Xmania · Published 2026-02-17 · Updated 2026-03-23 · CVE-2026-26731

Positive Technologies · (AI Summary)

CVSS v3.1

8.8

High

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

Name of the Vulnerable Software and Affected Versions TOTOLINK A3002RU version 2.1.1-B20211108.1455

Description A stack-based buffer overflow exists due to the routernamer parameter within the formDnsv6 function. The issue is present in TOTOLINK A3002RU version 2.1.1-B20211108.1455. The vulnerable parameter is routernamer.

Recommendations Update TOTOLINK A3002RU to a version newer than 2.1.1-B20211108.1455. As a temporary workaround, restrict or disable the use of the formDnsv6 function.

Exploit

Fix

Stack Overflow

Memory Corruption

Weakness Enumeration

CWE-121

CWE-787

Related Identifiers

CVE-2026-26731

Affected Products

Totolink A3002Ru

References · 10

• 🔥 https://github.com/0xmania/cve/tree/main/TOTOLINK-A3002RU-boa-formDnsv6-StackOverflow · Exploit
• https://osv.dev/vulnerability/CVE-2026-26731 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-26731 · Security Note
• https://twitter.com/DavidMarquet19/status/2033453252365185071 · Twitter Post
• https://twitter.com/CVEnew/status/2036024275766059230 · Twitter Post
• https://t.me/cveNotify/152576 · Telegram Post
• https://t.me/CVEtracker/44897 · Telegram Post
• https://t.me/cveNotify/155515 · Telegram Post
• https://t.me/cveNotify/155115 · Telegram Post
• https://twitter.com/infoflowcloud/status/2036025640302809543 · Twitter Post