How to verify CVE-2021-3975

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 25 NVT checks for CVE-2021-3975. 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='1.3.6.1.4.1.25623.1.0.845350' details='1'/>"

NVT OIDs (25)

1.3.6.1.4.1.25623.1.0.845350since 2026-06-25
1.3.6.1.4.1.25623.1.1.11.2022.1759since 2026-06-25
1.3.6.1.4.1.25623.1.1.12.2022.5399.1since 2026-06-25
1.3.6.1.4.1.25623.1.1.1.2.2024.3778since 2026-06-25
1.3.6.1.4.1.25623.1.1.14.2022.1759since 2026-06-25
1.3.6.1.4.1.25623.1.1.15.2022.1759since 2026-06-25
1.3.6.1.4.1.25623.1.1.16.2022.1891since 2026-06-25
1.3.6.1.4.1.25623.1.1.17.2026.0213since 2026-07-30
1.3.6.1.4.1.25623.1.1.2.2022.2881since 2026-06-25
1.3.6.1.4.1.25623.1.1.2.2022.2899since 2026-06-25

+ 15 more NVTs

New to OpenVAS? Greenbone documentation ↗

Confirmed exposed? That's one CVE on one host.

We check your whole external estate — hundreds of IPs and domains — for this and thousands more, on a schedule.

Scan my estate

Verify another CVE