CVE-2026-26731
Stack-based buffer overflow in TOTOLINK A3002RU router formDnsv6; possible RCE.
Is CVE-2026-26731 being exploited?
Not confirmed. CVE-2026-26731 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.48% probability of exploitation in the next 30 days.
How severe is CVE-2026-26731?
CVE-2026-26731 is rated High with a CVSS score of 8.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-26731?
Not known from our data. No patch reference has been recorded for CVE-2026-26731, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-26731 affect?
CVE-2026-26731 affects TOTOLINK A3002RU, Firmware v2.1.1-B20211108.1455. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-26731?
Update firmware when fixed; disable remote management and monitor.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Possible remote code execution or device crash via crafted routernamer input in formDnsv6.
Patch when possible