What is CVE-2021-22359?

CVE-2021-22359 is a high-severity vulnerability in Huawei S5700, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2021-05-27.

How severe is CVE-2021-22359?

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

Improper input validation in Huawei S5700

CVE-2021-22359

There is a denial of service vulnerability in the verisions V200R005C00SPC500 of S5700 and V200R005C00SPC500 of S6700. An attacker could exploit this vulnerability by sending specific message to a targeted device. Due to insufficient input validation, successful exploit can cause the service abnormal.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2021-05-27 · 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: 0.007 (52.9th percentile), scored 2026-10-23.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: +0.000

Affected products

Huawei S5700
Huawei S5700 Firmware — versions v200r005c00spc500
Huawei S6700
Huawei S6700 Firmware — versions v200r005c00spc500
S5700;s6700 — versions V200R005C00SPC500

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

www.huawei.com/en/psirt/security-advisories/huawei-sa-20210519-02-dos-en (Vendor Advisory)

Frequently asked questions

What is CVE-2021-22359?: CVE-2021-22359 is a high-severity vulnerability in Huawei S5700, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2021-05-27.
How severe is CVE-2021-22359?: High severity. CVSS v3 base score is 7.5 out of 10.