What is CVE-2016-6669?

CVE-2016-6669 is a high-severity vulnerability in Huawei Usg2100, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2016-09-22.

How severe is CVE-2016-6669?

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

Buffer overflow in Huawei Usg2100

CVE-2016-6669

Buffer overflow in the Authentication, Authorization and Accounting (AAA) module in Huawei USG2100, USG2200, USG5100, and USG5500 unified security gateways with software before V300R001C10SPC600 allows remote authenticated RADIUS servers to execute arbitrary code by sending a crafted EAP packet.

Vulnerability class: Buffer Overflow

Published 2016-09-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.033 (88.5th percentile), scored 2026-10-23.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.033 · newest: 0.033 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

References

www.securityfocus.com/bid/92441 (vdb-entry)
www.huawei.com/en/psirt/security-advisories/huawei-sa-20160810-01-usg-en (VDB Entry)

Frequently asked questions

What is CVE-2016-6669?: CVE-2016-6669 is a high-severity vulnerability in Huawei Usg2100, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 7.5/10. Published 2016-09-22.
How severe is CVE-2016-6669?: High severity. CVSS v3 base score is 7.5 out of 10.