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TI-2026-23826 Aliases CVE-2026-31027GHSA-v5j6-9mr9-qwhr

TOTOlink A3600R v5.9c.4959 contains a buffer overflow vulnerability in the…

Priority HIGH 82CWE-120Published · Updated

Key facts

Attack vector
Network
Privileges required
None
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 · CISA ADP. Fix status from CNA. Impact type from CWE-120 and the CVSS impact.

Summary

TOTOlink A3600R v5.9c.4959 contains a buffer overflow vulnerability in the setAppEasyWizardConfig interface of /lib/cste_modules/app.so. The vulnerability occurs because the rootSsid parameter is not properly validated for length, allowing remote attackers to trigger a buffer overflow, potentially leading to arbitrary code execution or denial of service.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00608 49th 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
Yes
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:a3600r_firmware:5.9c.4959:*:*:*:*:*:*:*5.9c.4959VulnerableTOTOLINK
cpe:2.3:h:totolink:a3600r:-:*:*:*:*:*:*:*not specified by NVDRunning onTOTOLINK
  • cpe:2.3:o:totolink:a3600r_firmware:5.9c.4959:*:*:*:*:*:*:* Versions 5.9c.4959 Vulnerable ·TOTOLINK
  • cpe:2.3:h:totolink:a3600r:-:*:*:*:*:*:*:* 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-2026-31027
  2. 2026-10-03 Alias added: GHSA-v5j6-9mr9-qwhr
  3. 2026-10-25 EPSS moved to the below the 50th percentile

References

Exploit 1

  • TI-2026-01369 Totolink A3600R app.so setAppEasyWizardConfig buffer overflow CVSS 4.0HIGH 8.7
  • TI-2024-06654 TOTOLINK A3600R cstecgi.cgi UploadCustomModule buffer overflow CVSS 4.0HIGH 8.7
  • TI-2024-06652 TOTOLINK A3600R cstecgi.cgi setWebWlanIdx buffer overflow CVSS 4.0HIGH 8.7
  • TI-2024-06651 TOTOLINK A3600R cstecgi.cgi setUrlFilterRules buffer overflow CVSS 4.0HIGH 8.7
  • TI-2024-06650 TOTOLINK A3600R cstecgi.cgi setUploadSetting buffer overflow CVSS 4.0HIGH 8.7
  • TI-2024-06649 TOTOLINK A3600R cstecgi.cgi setUpgradeFW buffer overflow CVSS 4.0HIGH 8.7
See all 24 →

Sources

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