How to verify CVE-2021-3748

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 41 NVT checks for CVE-2021-3748. 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='1.3.6.1.4.1.25623.1.0.704980' details='1'/>"

NVT OIDs (41)

1.3.6.1.4.1.25623.1.0.704980since 2026-06-25
1.3.6.1.4.1.25623.1.0.845258since 2026-06-25
1.3.6.1.4.1.25623.1.0.854278since 2026-06-25
1.3.6.1.4.1.25623.1.0.854279since 2026-06-25
1.3.6.1.4.1.25623.1.0.854281since 2026-06-25
1.3.6.1.4.1.25623.1.0.854287since 2026-06-25
1.3.6.1.4.1.25623.1.0.892970since 2026-06-25
1.3.6.1.4.1.25623.1.0.893099since 2026-06-25
1.3.6.1.4.1.25623.1.1.1.1.2021.4980since 2026-06-25
1.3.6.1.4.1.25623.1.1.11.2022.1759since 2026-06-25

+ 31 more NVTs

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