CVE-2021-22309

Name: CVE-2021-22309
Creator: NVD / NIST
Published: 2021-03-22T18:15:14.433+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.77%

Last modified Jun 17, 2026

CVE-2021-22309 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. There is insecure algorithm vulnerability in Huawei products. A module uses less random input in a secure mechanism. EPSS estimates a 0.77% chance of exploitation in the next 30 days.

Description

There is insecure algorithm vulnerability in Huawei products. A module uses less random input in a secure mechanism. Attackers can exploit this vulnerability by brute forcing to obtain sensitive message. This can lead to information leak. Affected product versions include:USG9500 versions V500R001C30SPC200, V500R001C60SPC500,V500R005C00SPC200;USG9520 versions V500R005C00;USG9560 versions V500R005C00;USG9580 versions V500R005C00.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS Probability

0.77%

50.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-330

Affected Software

Vendor	Product	Versions
Huawei	Usg9500 Firmware	v500r001c30spc200
Huawei	Usg9500 Firmware	v500r001c60spc500
Huawei	Usg9500 Firmware	v500r005c00spc200
Huawei	Usg9520 Firmware	v500r005c00
Huawei	Usg9560 Firmware	v500r005c00
Huawei	Usg9580 Firmware	v500r005c00

References

https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20210202-01-fw-enVendor Advisory
https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20210202-01-fw-enVendor Advisory

Timeline

Published: Mar 22, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-22309?

How severe is CVE-2021-22309?

CVE-2021-22309 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.77% probability of exploitation in the next 30 days.

How do I fix CVE-2021-22309?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-22309?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST