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TI-2021-19036 Aliases CVE-2021-42892GHSA-26pp-v5jf-7qcc

In TOTOLINK EX1200T V4.1.2cu.5215, an attacker can start telnet without authorization…

Priority LOW 21CWE-798Published · Updated

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-798.

Summary

In TOTOLINK EX1200T V4.1.2cu.5215, an attacker can start telnet without authorization because the default username and password exists in the firmware.

Why it matters now

EPSS 0.00746 55th 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

Not available: CISA has not published SSVC decision points for this record.

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:ex1200t_firmware:4.1.2cu.5215:*:*:*:*:*:*:*4.1.2cu.5215VulnerableTOTOLINK
cpe:2.3:h:totolink:ex1200t:-:*:*:*:*:*:*:*not specified by NVDRunning onTOTOLINK
  • cpe:2.3:o:totolink:ex1200t_firmware:4.1.2cu.5215:*:*:*:*:*:*:* Versions 4.1.2cu.5215 Vulnerable ·TOTOLINK
  • cpe:2.3:h:totolink:ex1200t:-:*:*:*:*:*:*:* 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-2021-42892
  2. 2026-10-03 Alias added: GHSA-26pp-v5jf-7qcc

References

Exploit 1

  • TI-2025-20695 TOTOLINK EX1200T V4.1.2cu.5232_B20210713 was found to contain a pre-auth remote command… CVSS 3.1CRITICAL 9.8
  • TI-2025-20694 TOTOLINK EX1200T V4.1.2cu.5232_B20210713 was found to contain a pre-auth remote command… CVSS 3.1CRITICAL 9.8
  • TI-2025-05040 TOTOLINK EX1200T cstecgi.cgi setLanguageCfg stack-based overflow CVSS 4.0CRITICAL 9.3
  • TI-2025-05966 TOTOLINK EX1200T HTTP POST Request formIpv6Setup 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-2025-05737 TOTOLINK EX1200T HTTP POST Request formTmultiAP buffer overflow CVSS 4.0HIGH 8.7
See all 36 →

Sources

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