What is CVE-2020-6866?

CVE-2020-6866 is a medium-severity vulnerability in ZTE Zxctn 6500. CVSS score: 4.9/10. Published 2020-04-30.

How severe is CVE-2020-6866?

Medium severity. CVSS v3 base score is 4.9 out of 10.

Vulnerability in ZTE Zxctn 6500

CVE-2020-6866

A ZTE product is impacted by a resource management error vulnerability. An attacker could exploit this vulnerability to cause a denial of service by issuing a specific command. This affects: ZXCTN 6500 version V2.10.00R3B87.

Published 2020-04-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.009 (57.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 57.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

ZTE Zxctn 6500
ZTE Zxctn 6500 Firmware — versions 2.10.00r3b87
Zxctn 6500 — versions V2.10.00R3B87

References

support.zte.com.cn/support/news/LoopholeInfoDetail.aspx (Vendor Advisory)

Frequently asked questions

What is CVE-2020-6866?: CVE-2020-6866 is a medium-severity vulnerability in ZTE Zxctn 6500. CVSS score: 4.9/10. Published 2020-04-30.
How severe is CVE-2020-6866?: Medium severity. CVSS v3 base score is 4.9 out of 10.