CVE-2026-42021
Critical
Description
Multiple stack-based buffer overflow vulnerabilities exist in the boa formIpv6Setup static network configuration functionality of Totolink X2000R TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327. A specially crafted HTTP request can lead to arbitrary code execution. An attacker can make an authenticated HTTP request to trigger these vulnerabilities. This vulnerability concerns the static_dns1 parameter.
SeverityCritical
CVSS9.1
Exploit probability—
ProductTotolink
PublishedOct 20, 2026
First seenOct 20, 2026
Weakness typeCWE-121CWE-121
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| totolink Totolink | TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 | — |
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