7.5

CVE-2021-22309: huawei usg9500_firmware Use of Insufficiently Random Values

CVSS: 7.5v3.1HighModified
Published 22-03-2021Last modified 03-08-2024
Open JSON

Vulnerability summary

CVE-2021-22309 is a high (CVSS 7.5) Use of Insufficiently Random Values vulnerability in huawei usg9500_firmware. EPSS estimates a 0.79% chance of exploitation in the next 30 days, higher than 55.6% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
0.79%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 22-03-2021
    PublishedVulnerability first disclosed.
  2. 03-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 1 source · 2 versions

EPSS trend

Probability

0.79%

Chance of exploitation in the next 30 days

Percentile

56%

Versus all other CVEs

30-day change

+0.03 pp

From 0.77% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.79%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Huawei4 products

1 vendor · 4 products

References

1 links