How to verify CVE-2021-21290

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 16 NVT checks for CVE-2021-21290. 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='1.3.6.1.4.1.25623.1.0.149480' details='1'/>"

NVT OIDs (16)

1.3.6.1.4.1.25623.1.0.149480since 2026-06-25
1.3.6.1.4.1.25623.1.0.153731since 2026-06-25
1.3.6.1.4.1.25623.1.0.154900since 2026-06-25
1.3.6.1.4.1.25623.1.0.704885since 2026-06-25
1.3.6.1.4.1.25623.1.0.854605since 2026-06-25
1.3.6.1.4.1.25623.1.0.892555since 2026-06-25
1.3.6.1.4.1.25623.1.1.10.2021.0136since 2026-06-25
1.3.6.1.4.1.25623.1.1.1.1.2021.4885since 2026-06-25
1.3.6.1.4.1.25623.1.1.1.2.2021.2555since 2026-06-25
1.3.6.1.4.1.25623.1.1.12.2023.6049.1since 2026-06-25

+ 6 more NVTs

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