CVE-2026-51760CWE-284broken-access-control

CVE-2026-51760

Critical · published September 1, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
50.1
In the wild
Unconfirmed
What it is

Incorrect access control in the informSyncUpgfw function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to mass-trigger firmware update activity across mesh slaves via sending a crafted MQTT message to the cs_broker component.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00641 · 50.1th 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 informSyncUpgfw function of TOTOLINK T6 4.1.5cu.748_B20211015 allows unauthenticated attackers to mass-trigger firmware update…
    cvelistv5