What is CVE-2026-1140?

CVE-2026-1140 is a high-severity vulnerability in Utt 520w, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-01-19.

How severe is CVE-2026-1140?

High severity. CVSS v3 base score is 8.8 out of 10.

Buffer overflow in Utt 520w

CVE-2026-1140

A vulnerability was found in UTT 进取 520W 1.7.7-180627. This issue affects the function strcpy of the file /goform/ConfigExceptAli. The manipulation results in buffer overflow. It is possible to launch the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

Vulnerability class: Buffer Overflow

EPSS: 0.006 (47.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Utt 520w — versions 3.0
Utt 520w_firmware
Utt 进取 520w — versions 1.7.7-180627

Weakness classification (CWE)

References

cna@vuldb.com (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
cna@vuldb.com (signature, Permissions Required, permissions-required, VDB Entry)
cna@vuldb.com (VDB Entry, Third Party Advisory, third-party-advisory)
cna@vuldb.com (Exploit, Third Party Advisory, exploit)

Frequently asked questions

What is CVE-2026-1140?: CVE-2026-1140 is a high-severity vulnerability in Utt 520w, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 8.8/10. Published 2026-01-19.
How severe is CVE-2026-1140?: High severity. CVSS v3 base score is 8.8 out of 10.