CVE-2026-10139CWE-121

CVE-2026-10139

Critical · published October 21, 2026

CVSS v3.1
9.1
EPSS
1%
Percentile
60.7
In the wild
Unconfirmed
What it is

A stack-based buffer overflow vulnerability exists in the Mcli 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 this vulnerability.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00946 · 60.7th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-10-21T01:17Z
References (1)
https://talosintelligence.com/vulnerability_reports/TALOS-2026-2439 · [email protected]
EPSS history
Timeline
  • 22 OCT 03:28Z
    EPSS moved — → 1%
    epss
  • 20 OCT 20:25Z
    A stack-based buffer overflow vulnerability exists in the Mcli functionality of X2000R (version(s): TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327)
    cvelistv5
  • 20 OCT 20:25Z
    A stack-based buffer overflow vulnerability exists in the Mcli functionality of X2000R (version(s): TOTOLINK-X2000R-Gh-V1.0.0-B20250421.1327)
    cvelistv5