TI-2025-01597 Aliases CVE-2025-1852 GHSA-v35v-mpjj-v438

Totolink EX1800T cstecgi.cgi loginAuth buffer overflow

HIGH 73CWE-119Published 2025-03-03 · Updated 2025-03-03

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.

Summary

A vulnerability has been found in Totolink EX1800T 9.1.0cu.2112_B20220316 and classified as critical. This vulnerability affects the function loginAuth of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument password leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00872 59th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by the CNA

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: Total

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	EX1800T	9.1.0cu.2112_B20220316	—	No fix listed	CNA

EX1800T VendorTOTOLINK Affected 9.1.0cu.2112_B20220316 Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPE	Versions	Role	Vendor
cpe:2.3:o:totolink:ex1800t_firmware:9.1.0cu.2112_b20220316:::::::*	9.1.0cu.2112_b20220316	Vulnerable	TOTOLINK
cpe:2.3:h:totolink:ex1800t:-:::::::*	not specified by NVD	Running on	TOTOLINK

cpe:2.3:o:totolink:ex1800t_firmware:9.1.0cu.2112_b20220316:*:*:*:*:*:*:* Versions 9.1.0cu.2112_b20220316 Vulnerable ·TOTOLINK
cpe:2.3:h:totolink:ex1800t:-:*:*:*:*:*:*:* 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-2025-1852
2026-10-03 Alias added: GHSA-v35v-mpjj-v438

References

Exploit 1

https://github.com/watermelon-happy/cve/blob/main/ex1800tCVE.md

Other 1

https://www.totolink.net/

TI-2024-22662 TOTOLINK EX1800T V9.1.0cu.2112_B20220316 has a vulnerability in the apcliEncrypType… CVSS 3.1CRITICAL 9.8
TI-2025-02085 TOTOLINK EX1800T cstecgi.cgi setWiFiExtenderConfig stack-based overflow CVSS 4.0HIGH 8.7
TI-2025-02084 TOTOLINK EX1800T cstecgi.cgi setPasswordCfg stack-based overflow CVSS 4.0HIGH 8.7
TI-2025-01835 TOTOLINK EX1800T cstecgi.cgi setRptWizardCfg stack-based overflow CVSS 4.0HIGH 8.7
TI-2025-01834 TOTOLINK EX1800T cstecgi.cgi setRebootScheCfg os command injection CVSS 4.0MEDIUM 5.3
TI-2025-01833 TOTOLINK EX1800T cstecgi.cgi setDmzCfg os command injection CVSS 4.0MEDIUM 5.3

See all 27 →

Sources

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