How to verify CVE-2021-41496

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 33 NVT checks for CVE-2021-41496. 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='1.3.6.1.4.1.25623.1.0.854385' details='1'/>"

NVT OIDs (33)

1.3.6.1.4.1.25623.1.0.854385since 2026-06-25
1.3.6.1.4.1.25623.1.0.854594since 2026-06-25
1.3.6.1.4.1.25623.1.0.854981since 2026-06-25
1.3.6.1.4.1.25623.1.1.10.2022.0032since 2026-06-25
1.3.6.1.4.1.25623.1.1.12.2022.5763.1since 2026-06-25
1.3.6.1.4.1.25623.1.1.16.2022.1485since 2026-06-25
1.3.6.1.4.1.25623.1.1.17.1.2022.0025since 2026-06-25
1.3.6.1.4.1.25623.1.1.18.1.2024.13220.1since 2026-06-25
1.3.6.1.4.1.25623.1.1.18.1.2024.14311.1since 2026-06-25
1.3.6.1.4.1.25623.1.1.18.1.2026.11371.1since 2026-07-28

+ 23 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