CVE-2026-23826: A vulnerability in a network management service of AOS-8 Operating System could allow an unauthenticated remot

This month

HIGH 7.5REMOTEUPGRADEUPGRADE

CVE-2026-23826 is a high-severity flaw (CVSS 7.5) affecting arubaos, sd-wan. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in a network management service of AOS-8 Operating System could allow an unauthenticated remote attacker to exploit this vulnerability by sending specially crafted network packets to the affected device, potentially resulting in a denial-of-service condition. Successful exploitation could cause the affected service process to terminate unexpectedly, disrupting normal device operations.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 66%)
CISA exploited list	No
Weakness	CWE-770
Published	2026-05-12
Last modified	2026-10-26

Publisher (CNA): Hewlett Packard Enterprise (HPE) · Vendor: arubanetworks

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-12 20:16 UTCPublished CVE record published
2026-10-26 18:10 UTCUpdated Record last modified

arubanetworks arubaos UPGRADE

Affected: >= 6.5.4.0 and < 8.10.0.22 · >= 8.11.0.0 and < 8.12.0.7 · >= 8.13.0.0 and < 8.13.1.2

Fixed in: 8.10.0.22, 8.12.0.7, 8.13.1.2

Safe to downgrade to: a release before 6.5.4.0

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 sd-wan UPGRADE

Affected: >= 8.6.0.4-2.2.0.0 and <= 8.6.0.4-2.2.0.7 · >= 8.7.0.0-2.3.0.0 and <= 8.7.0.0-2.3.0.9

Fixed in: newer than 8.7.0.0-2.3.0.9

Safe to downgrade to: a release before 8.6.0.4-2.2.0.0

1. Check installed version

apt-cache policy sd-wan || rpm -q sd-wan || sd-wan --version

2. UPGRADE to newer than 8.7.0.0-2.3.0.9 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade sd-wan

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade sd-wan

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 8.6.0.4-2.2.0.0 (Debian / Ubuntu)

apt-cache madison sd-wan sudo apt install sd-wan=<VERSION_BEFORE_8.6.0.4-2.2.0.0> sudo apt-mark hold sd-wan

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list sd-wan sudo dnf downgrade sd-wan-<VERSION_BEFORE_8.6.0.4-2.2.0.0> sudo dnf versionlock add sd-wan

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2026-23826?

arubaos: upgrade to 8.10.0.22, 8.12.0.7, 8.13.1.2; sd-wan: upgrade to newer than 8.7.0.0-2.3.0.9. Exact commands for each OS are on this page.

Is CVE-2026-23826 being exploited?

CVE-2026-23826 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-2026-23826 affect?

CVE-2026-23826 affects arubaos, sd-wan. Severity is high (CVSS 7.5). A vulnerability in a network management service of AOS-8 Operating System could allow an unauthenticated remote attacker to exploit this vulnerability by sending specially crafted network packets to the affected device, potentially resultin

How urgent is CVE-2026-23826?

Priority 40/100. High severity; Remotely exploitable, no login, no user action

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References

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