A stack-based buffer overflow vulnerability exists in the Mcli functionality of X2000R (version(s): TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327). (CVE-2026-10139)
Description
A stack-based buffer overflow vulnerability exists in the Mcli functionality of TOTOLINK X2000R firmware version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327. This vulnerability can be triggered by an authenticated HTTP request, potentially allowing arbitrary code execution. The vulnerability has a critical severity with a CVSS score of 9.1.
CVSS v3.1
Score 9.1critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-10139 describes a stack-based buffer overflow in the Mcli functionality of the TOTOLINK X2000R device running firmware version TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327. An attacker with authentication privileges can send a specially crafted HTTP request to exploit this vulnerability, leading to arbitrary code execution. The vulnerability is classified under CWE-121 (stack-based buffer overflow) and has a CVSS 3.1 score of 9.1, indicating high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation allows an authenticated attacker to execute arbitrary code on the affected device, potentially leading to full compromise of the system. This impacts confidentiality, integrity, and availability of the device and its network environment.
Mitigation Recommendations
No patch or official fix information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, restrict access to the device's management interface to trusted users only and monitor for suspicious authenticated HTTP requests targeting the Mcli functionality.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-r78c-9frx-8x59
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-10139"]
- Database Specific Severity
- CRITICAL
- Cvss Version
- 3.1
Threat ID: 6ad7ec132cdf04f6566aefbf
Added to database: 10/20/2026, 22:32:51 UTC
Last enriched: 10/20/2026, 22:36:20 UTC
Last updated: 10/20/2026, 23:48:21 UTC
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.