CVE-2021-22309

mediumpriority · track · 30OT risk · elevatedEPSS 0.008 · 56 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.79% (56th) EPSS

CVSS 5 · medium

Is it mine?

8 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-28

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

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-330USprimary

affected products (8)

Products and version ranges known to be affected.

n/a USG9500,USG9520,USG9560,USG9580≤ V500R001C30SPC200,V500R001C60SPC500,V500R005C00SPC200enisa_euvdEU
n/a USG9500,USG9520,USG9560,USG9580≤ V500R005C00enisa_euvdEU
huawei usg9500 firmware= v500r001c30spc200nvdUScpe:2.3:o:huawei:usg9500_firmware:*:*:*:*:*:*:*:*
huawei usg9500 firmware= v500r001c60spc500nvdUScpe:2.3:o:huawei:usg9500_firmware:*:*:*:*:*:*:*:*
huawei usg9500 firmware= v500r005c00spc200nvdUScpe:2.3:o:huawei:usg9500_firmware:*:*:*:*:*:*:*:*
huawei usg9520 firmware= v500r005c00nvdUScpe:2.3:o:huawei:usg9520_firmware:*:*:*:*:*:*:*:*
huawei usg9560 firmware= v500r005c00nvdUScpe:2.3:o:huawei:usg9560_firmware:*:*:*:*:*:*:*:*
huawei usg9580 firmware= v500r005c00nvdUScpe:2.3:o:huawei:usg9580_firmware:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2021-03-22modified 2026-06-17

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references (5)

External citations — patches, advisories, analysis.

scry

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