CVE-2026-42026: totolink Stack-based Buffer Overflow
CVSS: 9.1v3.1CriticalReceived
Published 20-10-2026Last modified 20-10-2026
Vulnerability summary
CVE-2026-42026 is a critical (CVSS 9.1) Stack-based Buffer Overflow vulnerability in totolink.
CVSS score
9.1/10
010
Critical · v3.1 (CVE.org)EPSS score
Not scored
0%100%
No EPSS score yetKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Timeline
- 20-10-2026PublishedVulnerability first disclosed.
Description
Multiple exploitable stack-based buffer overflow vulnerabilities exist in the boa formIpv6Setup dhcp_dns functionality of X2000R (version(s): 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 dhcp_dns2 parameter.
CVSS metrics
2 scores · 2 sources · 1 versionCritical 9.1Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:HSourcesAll 2 agree
- NVDNIST9.1CriticalCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
EPSS trend
No EPSS score has been published for this record yet.
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Totolink1 product
- totolinkTOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327
1 vendor · 1 product