CVE-2026-42020

State: Published
Severity: 9.1 Critical
Published: Oct 20, 2026
Updated: Oct 28, 2026
Reserved: Apr 23, 2026

Description

Multiple stack-based buffer overflow vulnerabilities exist in the boa formIpv6Setup pppoe 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 pppoe_dns2 parameter.

Scores

CVSS	Score	Vector	Source
3.1	9.1 Critical	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H	talos

Weaknesses

CWE-121 Stack-based Buffer Overflow

Affected Products

Product	Versions
Totolinktotolink	TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327Affected

References

https://talosintelligence.com/vulnerability_reports/TALOS-2026-2394

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