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TI-2026-21374 Aliases CVE-2026-26731GHSA-qvhf-98cj-8779

TOTOLINK A3002RU V2.1.1-B20211108.1455 was discovered to contain a stack-based buffer…

Priority HIGH 73CWE-121Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

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

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00517 44th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:o:totolink:a3002ru_firmware:2.1.1-b20211108.1455:*:*:*:*:*:*:*2.1.1-b20211108.1455VulnerableTOTOLINK
cpe:2.3:h:totolink:a3002ru-v2:-:*:*:*:*:*:*:*not specified by NVDRunning onTOTOLINK
  • cpe:2.3:o:totolink:a3002ru_firmware:2.1.1-b20211108.1455:*:*:*:*:*:*:* Versions 2.1.1-b20211108.1455 Vulnerable ·TOTOLINK
  • cpe:2.3:h:totolink:a3002ru-v2:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·TOTOLINK

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-26731
  2. 2026-10-03 Alias added: GHSA-qvhf-98cj-8779
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Exploit 1

  • TI-2024-22621 TOTOLINK AC1200 Wireless Router A3002RU V2.1.1-B20230720.1011 is vulnerable to Buffer… CVSS 3.1CRITICAL 9.8
  • TI-2026-21376 TOTOLINK A3002RU_V3 V3.0.0-B20220304.1804 was discovered to contain a stack-based buffer… CVSS 3.1HIGH 8.8
  • TI-2025-06323 TOTOLINK A3002RU HTTP POST Request formParentControl buffer overflow CVSS 4.0HIGH 8.7
  • TI-2025-06309 TOTOLINK A3002RU HTTP POST Request formWlSiteSurvey buffer overflow CVSS 4.0HIGH 8.7
  • TI-2025-05794 TOTOLINK A702R/A3002R/A3002RU/EX1200T HTTP POST Request formIPv6Addr buffer overflow CVSS 4.0HIGH 8.7
  • TI-2025-05573 TOTOLINK A3002RU HTTP POST Request formMultiAP buffer overflow CVSS 4.0HIGH 8.7
See all 48 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences