THREATPORT/VULNERABILITY/CVE-2026-0838
HIGH SEVERITY

CVE-2026-0838

520w Firmware vulnerability

CVSS
8.8
EPSS
3.4%
EPSS pct
88th
Exploited
No known
A security flaw has been discovered in UTT 进取 520W 1.7.7-180627. This impacts the function strcpy of the file /goform/ConfigWirelessBase. Performing a manipulation of the argument ssid results in buffer overflow. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.
Affected vendor
Utt
Affected product
520w Firmware
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-119 — Improper Restriction of Operations within Memory Bounds
  • CWE-120 — Classic Buffer Overflow
Published
2026-01-11

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring low privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 88% of all scored CVEs.

Check your external exposure to CVE-2026-0838

  • Confirm whether Utt 520w Firmware is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2026-0838.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2026-0838

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