What is CVE-2026-26731?

CVE-2026-26731 is a high-severity vulnerability in Totolink A3002ru_firmware, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2026-02-17.

How severe is CVE-2026-26731?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Totolink A3002ru_firmware

CVE-2026-26731

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

Vulnerability class: Buffer Overflow

EPSS: 0.005 (37.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Totolink A3002ru_firmware — versions 2.1.1-b20211108.1455
Totolink A3002ru-v2
N/a — versions n/a

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write
CWE-121 — Stack-based Buffer Overflow

References

cve@mitre.org (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2026-26731?: CVE-2026-26731 is a high-severity vulnerability in Totolink A3002ru_firmware, classified under Out-of-bounds Write. CVSS score: 8.8/10. Published 2026-02-17.
How severe is CVE-2026-26731?: High severity. CVSS v3 base score is 8.8 out of 10.