CVE-2026-9659: totolink Stack-based Buffer Overflow
CVSS: 9.1v3.1CriticalReceived
Published 20-10-2026Last modified 20-10-2026
Vulnerability summary
CVE-2026-9659 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 formFilter 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 deals with the vpnUser 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