CVE-2026-51756CWE-284broken-access-control

CVE-2026-51756

Medium · published September 1, 2026

CVSS v3.1
5.9
EPSS
0%
Percentile
36.6
In the wild
Unconfirmed
What it is

Incorrect access control in the meshSlaveUpgfw function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to start firmware flashing using existing upgrade files via sending a crafted MQTT message to the cs_broker component.

The record
Technical detail
CVSS v3.1
5.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00433 · 36.6th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-09-01T18:17Z
References (4)
https://github.com/DarkBoulder/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md · [email protected]https://github.com/ShengWu00/CVE-Vendor-Coordination/blob/main/TOTOLINK/README.md · [email protected]https://www.totolink.net/ · [email protected]https://www.totolink.net/home/menu/detail/menu_listtpl/download/id/190/ids/36.html · [email protected]
EPSS history
Timeline
  • 03 SEP 03:30Z
    EPSS moved — → 0%
    epss
  • 01 SEP 00:00Z
    Incorrect access control in the meshSlaveUpgfw function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to start firmware flashing using…
    cvelistv5