CVE-2026-42020 Details
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.
A stack-based buffer overflow vulnerability has been identified in the Totolink X2000R router, specifically in the boa formIpv6Setup PPPoE functionality of version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327. This vulnerability allows authenticated attackers to send specially crafted HTTP requests that can lead to arbitrary code execution. The issue arises in the pppoe_dns2 parameter, where input is directly copied to the stack without any validation, creating an opportunity for exploitation.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 20, 2026CISA-ADP
Assessed Oct 28, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://talosintelligence.com/vulnerability_reports/TALOS-2026-2394 | [email protected] | AdvisoryBundleExploitTechnical Analysis |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-121 | Stack-based Buffer Overflow | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Totolink X2000R | TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327 |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 28, 2026 | CVE Modified | CISA-ADP |
| Oct 20, 2026 | New CVE Received | [email protected] |