CVE-2022-36331: Western Digital My Cloud, My Cloud Home, My Cloud Home Duo, and SanDisk ibi devices were vulnerable to an impe

Q: How do I fix CVE-2022-36331?

my cloud pr2100 firmware: upgrade to 5.25.132; my cloud pr4100 firmware: upgrade to 5.25.132; my cloud ex4100 firmware: upgrade to 5.25.132. Exact commands for each OS are on this page.

Q: Is CVE-2022-36331 being exploited?

CVE-2022-36331 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-36331 affect?

CVE-2022-36331 affects my cloud pr2100 firmware, my cloud pr4100 firmware, my cloud ex4100 firmware. Severity is critical (CVSS 10.0). Western Digital My Cloud, My Cloud Home, My Cloud Home Duo, and SanDisk ibi devices were vulnerable to an impersonation attack that could allow an unauthenticated attacker to gain access to user data. This issue affects My Cloud OS 5 device

Q: How urgent is CVE-2022-36331?

Priority 52/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 10.0REMOTEUPGRADEUPGRADEUPGRADE

CVE-2022-36331 is a critical-severity flaw (CVSS 10.0) affecting my cloud pr2100 firmware, my cloud pr4100 firmware, my cloud ex4100 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Western Digital My Cloud, My Cloud Home, My Cloud Home Duo, and SanDisk ibi devices were vulnerable to an impersonation attack that could allow an unauthenticated attacker to gain access to user data. This issue affects My Cloud OS 5 devices: before 5.25.132; My Cloud Home and My Cloud Home Duo: before 8.13.1-102; SanDisk ibi: before 8.13.1-102.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	10.0 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 52%)
CISA exploited list	No
Weakness	CWE-290
Published	2023-06-12
Last modified	2026-06-17

Publisher (CNA): Western Digital · Vendor: westerndigital

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-06-12 18:15 UTCPublished CVE record published
2026-06-17 04:53 UTCUpdated Record last modified

westerndigital my cloud pr2100 firmware UPGRADE

Affected: < 5.25.132

Fixed in: 5.25.132

Safe to downgrade to: no unaffected older release

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.

westerndigital my cloud pr4100 firmware UPGRADE

Affected: < 5.25.132

Fixed in: 5.25.132

Safe to downgrade to: no unaffected older release

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.

westerndigital my cloud ex4100 firmware UPGRADE

Affected: < 5.25.132

Fixed in: 5.25.132

Safe to downgrade to: no unaffected older release

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.

westerndigital my cloud ex2 ultra firmware UPGRADE

Affected: < 5.25.132

Fixed in: 5.25.132

Safe to downgrade to: no unaffected older release

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.

westerndigital my cloud mirror g2 firmware UPGRADE

Affected: < 5.25.132

Fixed in: 5.25.132

Safe to downgrade to: no unaffected older release

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.

westerndigital my cloud dl2100 firmware UPGRADE

Affected: < 5.25.132

Fixed in: 5.25.132

Safe to downgrade to: no unaffected older release

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.

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-2022-36331?

my cloud pr2100 firmware: upgrade to 5.25.132; my cloud pr4100 firmware: upgrade to 5.25.132; my cloud ex4100 firmware: upgrade to 5.25.132. Exact commands for each OS are on this page.

Is CVE-2022-36331 being exploited?

CVE-2022-36331 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-2022-36331 affect?

CVE-2022-36331 affects my cloud pr2100 firmware, my cloud pr4100 firmware, my cloud ex4100 firmware. Severity is critical (CVSS 10.0). Western Digital My Cloud, My Cloud Home, My Cloud Home Duo, and SanDisk ibi devices were vulnerable to an impersonation attack that could allow an unauthenticated attacker to gain access to user data. This issue affects My Cloud OS 5 device

How urgent is CVE-2022-36331?

Priority 52/100. Critical severity; Remotely exploitable, no login, no user action

Software pages

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References

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