Is CVE-2026-7538 actively exploited?

CVE-2026-7538 has no public evidence of in-the-wild exploitation as of 2026-05-01.

What is the CVSS score for CVE-2026-7538?

CVE-2026-7538 has a CVSS score of 8.9 (HIGH severity). Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

How do I patch CVE-2026-7538?

Vendor patch guidance is linked from the references on this page. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-7538.

Which products are affected by CVE-2026-7538?

Affected products for CVE-2026-7538 are listed on this page once vendor data becomes available.

Fix CVE-2026-7538 - HIGH Vulnerability

Description

A vulnerability was identified in Totolink A8000RU 7.1cu.643_b20200521. This issue affects the function Vulnerability of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument proto leads to os command injection. The attack may be initiated remotely. The exploit is publicly available and might be used.

CVSS Metrics

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-77 · Command Injection CWE-78 · OS Command Injection

Metadata

Primary Vendor: UNKNOWN
Published: 5/1/2026
Last Modified: 5/1/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2026-7538

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary