What is CVE-2026-51756?

CVE-2026-51756 is a medium-severity vulnerability in N/a, classified under Improper Access Control. CVSS score: 5.9/10. Published 2026-09-01.

How severe is CVE-2026-51756?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in N/a

CVE-2026-51756

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.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

CWE-284 — Improper Access Control

References

cve@mitre.org
cve@mitre.org
cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-51756?: CVE-2026-51756 is a medium-severity vulnerability in N/a, classified under Improper Access Control. CVSS score: 5.9/10. Published 2026-09-01.
How severe is CVE-2026-51756?: Medium severity. CVSS v3 base score is 5.9 out of 10.