Paper/Archive/CVE-2026-42021

CVE-2026-42021

totolink Totolink — Multiple stack-based buffer overflow vulnerabilities exist in the boa formIpv6Setup static network configuration functionality of Totolin…

EPSS 0.5%CVSS 9.1

critical.is priorityof 100

CVSS 9.1 (CNA)9.1 / 10 × 3027.3 Not in CISA KEV+300.0 EPSS percentile 41.1.411 × 208.2 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

TotolinkTOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327–CNA

Scores by source

talos (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

reftalosintelligence.com/vulnerability_reports/TALOS-2026-2395