CVE-2021-37735Network attack vector

Unauthenticated remote WLAN interruption

Published Oct 12, 2021 · Updated Aug 4, 2024

Denial of service in HPE Aruba Instant 6.5.4.18 and earlier, 8.5.0.10 and earlier, and 8.6.0.4 and earlier allows remote attackers to interrupt WLANs. HPE has not published the affected component, the triggering input, or the operation that mishandles that input. No authentication or user interaction is required, and the published consequence is limited to interruption of the affected wireless service.

CVSS severity5.3
Medium
EPSS probability1.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Denial of service in HPE Aruba Instant 6.5.4.18 and earlier, 8.5.0.10 and earlier, and 8.6.0.4 and earlier allows remote attackers to interrupt WLANs. HPE has not published the affected component, the triggering input, or the operation that mishandles that input. No authentication or user interaction is required, and the published consequence is limited to interruption of the affected wireless service.

The record

CVE
CVE-2021-37735
Published
Oct 12, 2021
Updated
Aug 4, 2024
Vendor
Hewlett Packard Enterprise (HPE)
Product
Aruba Instant
Classifications
CWE-134, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 12, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Aruba Instant 6.5.x.x: 6.5.4.18 and below
  2. Affected versionversion=Aruba Instant 8.5.x.x: 8.5.0.10 and below
  3. Affected versionversion=Aruba Instant 8.6.x.x: 8.6.0.4 and below

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Hewlett Packard Enterprise (HPE) · Aruba Instantversion=Aruba Instant 6.5.x.x: 6.5.4.18 and below; version=Aruba Instant 8.5.x.x: 8.5.0.10 and below; version=Aruba Instant 8.6.x.x: 8.6.0.4 and below

Published CVSS scores

5.3NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
5.0NIST National Vulnerability DatabaseAV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-134Use of Externally-Controlled Format String
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo