TI-2021-19027 Aliases CVE-2021-42877 GHSA-mqjp-8xpc-4xf9

TOTOLINK EX1200T V4.1.2cu.5215 contains a denial of service vulnerability in function…

LOW 36Published 2022-06-02 · Updated 2026-07-09

Key facts

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

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

TOTOLINK EX1200T V4.1.2cu.5215 contains a denial of service vulnerability in function RebootSystem of the file lib/cste_modules/system which can reboot the system.

Why it matters now

EPSS 0.01695 77th 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

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:totolink:ex1200t_firmware:4.1.2cu.5215:::::::*	4.1.2cu.5215	Vulnerable	TOTOLINK
cpe:2.3:h:totolink:ex1200t:-:::::::*	not specified by NVD	Running on	TOTOLINK

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

2026-10-02 Threatist record created from CVE-2021-42877
2026-10-03 Alias added: GHSA-mqjp-8xpc-4xf9

References

Exploit 1

https://github.com/p1Kk/vuln/blob/main/totolink_ex1200t_reboot.md

Advisory 1

http://totolink.net/

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