How to verify CVE-2021-33120

Confirm whether your systems are actually affected — run the exact detection check below (Nuclei command or OpenVAS NVT). Detection only; it does not exploit.

Verify with OpenVAS

Greenbone/OpenVAS ships 11 NVT checks for CVE-2021-33120. OpenVAS detects this CVE by NVT OID — enable the NVT in your scan config, or confirm it is in your feed with the query below.

Confirm the NVT is in your feed (GMP)

gvm-cli socket --xml "<get_nvts nvt_oid='1.3.6.1.4.1.25623.1.0.845417' details='1'/>"

NVT OIDs (11)

1.3.6.1.4.1.25623.1.0.845417since 2026-06-25
1.3.6.1.4.1.25623.1.0.854513since 2026-06-25
1.3.6.1.4.1.25623.1.1.10.2022.0064since 2026-06-25
1.3.6.1.4.1.25623.1.1.12.2022.5486.1since 2026-06-25
1.3.6.1.4.1.25623.1.1.12.2022.5535.1since 2026-06-25
1.3.6.1.4.1.25623.1.1.18.1.2024.11840.1since 2026-06-25
1.3.6.1.4.1.25623.1.1.4.2022.0502.1since 2026-06-25
1.3.6.1.4.1.25623.1.1.4.2022.0541.1since 2026-06-25
1.3.6.1.4.1.25623.1.1.4.2022.0574.1since 2026-06-25
1.3.6.1.4.1.25623.1.1.4.2022.0575.1since 2026-06-25

+ 1 more NVT

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