TI-2026-04378 Aliases CVE-2026-5020 GHSA-98vg-cqgx-463p

Totolink A3600R Parameter cstecgi.cgi setNoticeCfg command injection

MEDIUM 57CWE-74Published 2026-03-29 · Updated 2026-04-01

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 A3600R 4.1.2cu.5182_B20201102. Affected by this issue is the function setNoticeCfg of the file /cgi-bin/cstecgi.cgi of the component Parameter Handler. The manipulation of the argument NoticeUrl results in command injection. The attack may be launched 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 0.02552 85th 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	A3600R	4.1.2cu.5182_B20201102	—	No fix listed	CNA

A3600R VendorTOTOLINK Affected 4.1.2cu.5182_B20201102 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:totolink:a3600r_firmware:4.1.2cu.5182_b20201102:::::::*	4.1.2cu.5182_b20201102	Vulnerable	TOTOLINK
cpe:2.3:h:totolink:a3600r:-:::::::*	not specified by NVD	Running on	TOTOLINK

cpe:2.3:o:totolink:a3600r_firmware:4.1.2cu.5182_b20201102:*:*:*:*:*:*:* Versions 4.1.2cu.5182_b20201102 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

2026-10-02 Threatist record created from CVE-2026-5020
2026-10-03 Alias added: GHSA-98vg-cqgx-463p

References

Exploit 1

https://lavender-bicycle-a5a.notion.site/TOTOLINK_A3600R_setNoticeCfg-32253a41781f80c197eaf8e7558c5ed1?source=copy_link

Other 1

https://www.totolink.net/

TI-2026-23826 TOTOlink A3600R v5.9c.4959 contains a buffer overflow vulnerability in the… CVSS 3.1CRITICAL 9.8
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

See all 24 →

Sources

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