TI-2021-20815 Aliases CVE-2021-45736 GHSA-c3p4-6x5w-74fx

TOTOLINK X5000R v9.1.0u.6118_B20201102 was discovered to contain a stack overflow in the…

LOW 35Published 2022-02-04 · Updated 2024-08-04

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 X5000R v9.1.0u.6118_B20201102 was discovered to contain a stack overflow in the function setL2tpServerCfg. This vulnerability allows attackers to cause a Denial of Service (DoS) via the eip, sip, server parameters.

Why it matters now

EPSS 0.01175 67th 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:x5000r_firmware:9.1.0u.6118_b20201102:::::::*	9.1.0u.6118_b20201102	Vulnerable	TOTOLINK
cpe:2.3:h:totolink:x5000r:-:::::::*	not specified by NVD	Running on	TOTOLINK

cpe:2.3:o:totolink:x5000r_firmware:9.1.0u.6118_b20201102:*:*:*:*:*:*:* Versions 9.1.0u.6118_b20201102 Vulnerable ·TOTOLINK
cpe:2.3:h:totolink:x5000r:-:*:*:*:*:*:*:* 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-2021-45736
2026-10-03 Alias added: GHSA-c3p4-6x5w-74fx

References

Exploit 1

https://github.com/pjqwudi/my_vuln/blob/main/totolink/vuln_9/9.md

TI-2025-43097 TOTOLINK X5000R v9.1.0cu_2415_B20250515 contains an argument injection vulnerability in… CVSS 3.1CRITICAL 9.8
TI-2025-12054 Incorrect authorization in TOTOLINK X5000R's CVSS 3.1CRITICAL 9.8
TI-2024-28597 In TOTOLINK X5000r v9.1.0cu.2350_b20230313, the file /cgi-bin/cstecgi.cgi contains an OS… CVSS 3.1CRITICAL 9.8
TI-2024-28595 In TOTOLINK X5000r v9.1.0cu.2350_b20230313, the file /cgi-bin/cstecgi.cgi contains an OS… CVSS 3.1CRITICAL 9.8
TI-2024-28587 In TOTOLINK X5000r v9.1.0cu.2350_b20230313, the file /cgi-bin/cstecgi.cgi contains an OS… CVSS 3.1CRITICAL 9.8
TI-2024-21298 TOTOLINK X5000R V9.1.0cu.2350_B20230313 was discovered to contain a command injection… CVSS 3.1CRITICAL 9.8

See all 69 →

Sources

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