CVE-2009-3836: ArubaOS 3.3.1.x, 3.3.2.x, RN 3.1.x, 3.4.x, and 3.3.2.x-FIPS on the Aruba Mobility Controller allows remote att

Routine

MEDIUM 6.1MITIGATEMITIGATE

CVE-2009-3836 is a medium-severity flaw (CVSS 6.1) affecting arubaos, aruba mobility controller. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ArubaOS 3.3.1.x, 3.3.2.x, RN 3.1.x, 3.4.x, and 3.3.2.x-FIPS on the Aruba Mobility Controller allows remote attackers to cause a denial of service (Access Point crash) via a malformed 802.11 Association Request management frame.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.1 (Medium)
EPSS exploit chance	0.9% (top 40%)
CISA exploited list	No
Published	2009-11-02
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: arubanetworks

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2009-11-02 15:30 UTCPublished CVE record published
2026-06-16 23:12 UTCUpdated Record last modified

arubanetworks arubaos MITIGATE

Affected: 3.1.1 rn · 3.3.1.16 · 3.3.1.29 · 3.3.1.30 · 3.3.2.6 · 3.3.2.14 fips · 3.4.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.1.1

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

arubanetworks aruba mobility controller MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

Firmware

Install the latest firmware from the vendor advisory; if none, apply the vendor workaround.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2009-3836?

arubaos: mitigate or apply the listed mitigation; aruba mobility controller: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2009-3836 being exploited?

CVE-2009-3836 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2009-3836 affect?

CVE-2009-3836 affects arubaos, aruba mobility controller. Severity is medium (CVSS 6.1). ArubaOS 3.3.1.x, 3.3.2.x, RN 3.1.x, 3.4.x, and 3.3.2.x-FIPS on the Aruba Mobility Controller allows remote attackers to cause a denial of service (Access Point crash) via a malformed 802.11 Association Request management frame.

How urgent is CVE-2009-3836?

Priority 36/100. No elevated risk signals yet.

Software pages

Aruba vulnerabilities

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References

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