TI-2026-04456 Aliases CVE-2026-5105 GHSA-3h9m-4hx4-r4rj

Totolink A3300R Parameter cstecgi.cgi setVpnPassCfg command injection

MEDIUM 57CWE-74Published 2026-03-30 · Updated 2026-03-30

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-77.

Summary

A vulnerability was detected in Totolink A3300R 17.0.0cu.557_b20221024. The affected element is the function setVpnPassCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. Performing a manipulation of the argument pptpPassThru results in command injection. It is possible to initiate the attack remotely. The exploit is now public and may be used.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.04072 90th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA and 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: Partial

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
TOTOLINK	A3300R	17.0.0cu.557_b20221024	—	No fix listed	CNA

A3300R VendorTOTOLINK Affected 17.0.0cu.557_b20221024 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:totolink:a3300r_firmware:17.0.0cu.557_b20221024:::::::*	17.0.0cu.557_b20221024	Vulnerable	TOTOLINK
cpe:2.3:h:totolink:a3300r:-:::::::*	not specified by NVD	Running on	TOTOLINK

cpe:2.3:o:totolink:a3300r_firmware:17.0.0cu.557_b20221024:*:*:*:*:*:*:* Versions 17.0.0cu.557_b20221024 Vulnerable ·TOTOLINK
cpe:2.3:h:totolink:a3300r:-:*:*:*:*:*:*:* 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-2026-5105
2026-10-03 Alias added: GHSA-3h9m-4hx4-r4rj
2026-10-25 EPSS moved to the 90th–95th percentile

References

Exploit 1

https://github.com/LvHongW/Vuln-of-totolink_A3300R/tree/main/A3300R_pptpPassThru_cmd_inject

Other 1

https://www.totolink.net/

TI-2026-23871 An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing… CVSS 3.1CRITICAL 9.8
TI-2026-23869 An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing… CVSS 3.1CRITICAL 9.8
TI-2026-23868 An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing… CVSS 3.1CRITICAL 9.8
TI-2026-23866 An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing… CVSS 3.1CRITICAL 9.8
TI-2026-23861 An issue was discovered in ToToLink A3300R firmware v17.0.0cu.557_B20221024 allowing… CVSS 3.1CRITICAL 9.8
TI-2025-32465 Totolink A3300R V17.0.0cu.596_B20250515 was found to contain a command injection… CVSS 3.1CRITICAL 9.8

See all 63 →

Sources

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