No exploitation reportedFix available

CVE-2021-37721

Q: Is CVE-2021-37721 actively exploited?

Active exploitation of CVE-2021-37721 has not been confirmed. Its EPSS score was 3.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2021-37721?

CVE-2021-37721 has a CVSS v3 base score of 7.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2021-09-07
Fixed in8.7.1.4 · 8.6.0.9 · 8.5.0.13 · 8.3.0.16 · 6.5.4.20 · 6.4.4.25
WeaknessCWE-77

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A remote arbitrary command execution vulnerability was discovered in Aruba SD-WAN Software and Gateways; Aruba Operating System Software version(s): Prior to 8.6.0.4-2.2.0.4; Prior to 8.7.1.4, 8.6.0.9, 8.5.0.13, 8.3.0.16, 6.5.4.20, 6.4.4.25. Aruba has released patches for Aruba SD-WAN Software and Gateways and ArubaOS that address this security vulnerability.

Timeline

dates in UTC

2021-09-0713:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-37721?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-37721?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Arubanetworks arubaos

Branch	Affected	Fixed in	Source
8.7	≥ 8.7.0.0, < 8.7.1.4	8.7.1.4	NVD
8.6	≥ 8.6.0.0, < 8.6.0.9	8.6.0.9	NVD
8.5	≥ 8.5.0.0, < 8.5.0.13	8.5.0.13	NVD
8.3	≥ 8.3.0.0, < 8.3.0.16	8.3.0.16	NVD
6.5	≥ 6.5.4.0, < 6.5.4.20	6.5.4.20	NVD
6.4	≥ 6.4.4.0, < 6.4.4.25	6.4.4.25	NVD

Arubanetworks sd-wan

Branch	Affected	Fixed in	Source
2.2	≥ 2.2.0.0, < 2.2.0.4	2.2.0.4	NVD

Siemens scalance w1750d firmwareversion to verify

Branch	Affected	Fixed in	Source
—	all versions	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Arubanetworks arubaos to 8.7.1.4 · 8.6.0.9 · 8.5.0.13 · 8.3.0.16 · 6.5.4.20 · 6.4.4.25

Advisories and patches

cert-portal.siemens.comMitigation
www.arubanetworks.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.2read 2026-10-23
NVDCVSS 2.09read 2026-10-23
NVDweakness (CWE)CWE-77read 2026-10-23
FIRST EPSSEPSS score3.1 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Published: 2021-09-07
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2021-37721?

Is CVE-2021-37721 actively exploited?

Active exploitation of CVE-2021-37721 has not been confirmed. Its EPSS score was 3.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-37721?

CVE-2021-37721 has a CVSS v3 base score of 7.2 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

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