What is CVE-2023-31998?

CVE-2023-31998 is a high-severity vulnerability in Ubiquiti Aircube, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2023-07-18.

How severe is CVE-2023-31998?

High severity. CVSS v3 base score is 7.5 out of 10.

Buffer overflow in Ubiquiti Aircube

CVE-2023-31998

A heap overflow vulnerability found in EdgeRouters and Aircubes allows a malicious actor to interrupt UPnP service to said devices.

Vulnerability class: Buffer Overflow

Published 2023-07-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.008 (55.7th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 55.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Ubiquiti Aircube — versions 2.8.8
Ubiquiti Edgerouter — versions 2.0.9-hotfix.6
Ui Aircube
Ui Aircube Firmware
Ui Edgemax Edgerouter
Ui Edgemax Edgerouter Firmware — versions 2.0.9

Weakness classification (CWE)

References

community.ui.com/releases/Security-Advisory-Bulletin-033-033/17f7c7c0-830b-4625… (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2023-31998?: CVE-2023-31998 is a high-severity vulnerability in Ubiquiti Aircube, classified under Out-of-bounds Write. CVSS score: 7.5/10. Published 2023-07-18.
How severe is CVE-2023-31998?: High severity. CVSS v3 base score is 7.5 out of 10.