How to verify CVE-2016-7421

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 10 NVT checks for CVE-2016-7421. 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='1.3.6.1.4.1.25623.1.0.842944' details='1'/>"

NVT OIDs (10)

1.3.6.1.4.1.25623.1.0.842944since 2026-06-25
1.3.6.1.4.1.25623.1.0.851451since 2026-06-25
1.3.6.1.4.1.25623.1.0.891599since 2026-06-25
1.3.6.1.4.1.25623.1.1.12.2016.3125.1since 2026-06-25
1.3.6.1.4.1.25623.1.1.1.2.2018.1599since 2026-06-25
1.3.6.1.4.1.25623.1.1.18.1.2024.11287.1since 2026-06-25
1.3.6.1.4.1.25623.1.1.2.2019.2431since 2026-06-25
1.3.6.1.4.1.25623.1.1.2.2020.1430since 2026-06-25
1.3.6.1.4.1.25623.1.1.4.2016.2936.1since 2026-06-25
1.3.6.1.4.1.25623.1.1.4.2016.2988.1since 2026-06-25

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