TI-2026-01038 Aliases CVE-2026-1326 GHSA-c7c4-v9c9-65gw

Totolink NR1800X POST Request cstecgi.cgi setWanCfg command injection

MEDIUM 57CWE-74Published 2026-01-22 · Updated 2026-02-23

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 weakness has been identified in Totolink NR1800X 9.1.0u.6279_B20210910. This vulnerability affects the function setWanCfg of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. This manipulation of the argument Hostname causes command injection. The attack can be initiated remotely. The exploit has been made available to the public and could be used for attacks.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.03489 89th 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	NR1800X	9.1.0u.6279_B20210910	—	No fix listed	CNA

NR1800X VendorTOTOLINK Affected 9.1.0u.6279_B20210910 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:totolink:nr1800x_firmware:9.1.0u.6279_b20210910:::::::*	9.1.0u.6279_b20210910	Vulnerable	TOTOLINK
cpe:2.3:h:totolink:nr1800x:-:::::::*	not specified by NVD	Running on	TOTOLINK

cpe:2.3:o:totolink:nr1800x_firmware:9.1.0u.6279_b20210910:*:*:*:*:*:*:* Versions 9.1.0u.6279_b20210910 Vulnerable ·TOTOLINK
cpe:2.3:h:totolink:nr1800x:-:*:*:*:*:*:*:* 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-2026-1326
2026-10-03 Alias added: GHSA-c7c4-v9c9-65gw

References

Exploit 1

https://lavender-bicycle-a5a.notion.site/TOTOLINK-NR1800X-setWanCfg-2e453a41781f80b390f3e1ce0d9dd5b9?source=copy_link

Other 1

https://www.totolink.net/

TI-2023-06604 Totolink NR1800X cstecgi.cgi loginAuth stack-based overflow CVSS 3.1CRITICAL 9.8
TI-2026-01040 Totolink NR1800X POST Request cstecgi.cgi setWizardCfg buffer overflow CVSS 4.0HIGH 8.7
TI-2025-28867 TOTOLINK NR1800X V9.1.0u.6681_B20230703 was discovered to contain an authenticated stack… CVSS 3.1HIGH 8.8
TI-2025-28866 TOTOLINK NR1800X V9.1.0u.6681_B20230703 was discovered to contain an authenticated stack… CVSS 3.1HIGH 8.8
TI-2025-28865 TOTOLINK NR1800X V9.1.0u.6681_B20230703 was discovered to contain an authenticated stack… CVSS 3.1HIGH 8.8
TI-2025-28864 TOTOLINK NR1800X V9.1.0u.6681_B20230703 was discovered to contain an authenticated stack… CVSS 3.1HIGH 8.8

See all 26 →

Sources

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