NVD / CVE Program· CNA WDC PSIRT

CVE-2022-36327: Path traversal vulnerability leading to an arbitrary file write in Western Digital devices

Noroxi assessment

Priority: Monitor (action score 39/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 1.4% (FIRST EPSS); higher than 73.6% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to the record, no fixed version is available yet.
Severity is disputed: the assigning authority (CNA) scores it 5.8, NVD 9.8.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability that could allow an attacker to write files to locations with certain critical filesystem types leading to remote code execution was discovered in Western Digital My Cloud Home, My Cloud Home Duo, SanDisk ibi and Western Digital My Cloud OS 5 devices. This issue requires an authentication bypass issue to be triggered before this can be exploited. This issue affects My Cloud Home and My Cloud Home Duo: before 9.4.0-191; ibi: before 9.4.0-191; My Cloud OS 5: before 5.26.202.

CriticalCVSS 9.8 · v3.1—No exploit No fix recorded

BDU:2023-03290

Published: May 18, 2023
Updated: Jun 17, 2026
EPSS: 1.4% · 73th percentile
CWE: CWE-22

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 39 / 40 · 9.8 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 1.4%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 9.8
CNA · WDC PSIRT: 5.8; 4.0 point gap

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
westerndigital	my cloud os 5	cpe:2.3:o:westerndigital:my_cloud_os_5
westerndigital	my cloud	cpe:2.3:h:westerndigital:my_cloud
westerndigital	my cloud dl2100	cpe:2.3:h:westerndigital:my_cloud_dl2100
westerndigital	my cloud dl4100	cpe:2.3:h:westerndigital:my_cloud_dl4100
westerndigital	my cloud ex2 ultra	cpe:2.3:h:westerndigital:my_cloud_ex2_ultra
westerndigital	my cloud ex2100	cpe:2.3:h:westerndigital:my_cloud_ex2100
westerndigital	my cloud ex4100	cpe:2.3:h:westerndigital:my_cloud_ex4100
westerndigital	my cloud mirror g2	cpe:2.3:h:westerndigital:my_cloud_mirror_g2
westerndigital	my cloud pr2100	cpe:2.3:h:westerndigital:my_cloud_pr2100
westerndigital	my cloud pr4100	cpe:2.3:h:westerndigital:my_cloud_pr4100
westerndigital	wd cloud	cpe:2.3:h:westerndigital:wd_cloud
westerndigital	my cloud home firmware	cpe:2.3:o:westerndigital:my_cloud_home_firmware

and 5 more

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

westerndigital my cloud home duo firmwarebefore 9.4.0-191
westerndigital my cloud home firmwarebefore 9.4.0-191
westerndigital my cloud os 5before 5.26.202
westerndigital sandisk ibi firmwarebefore 9.4.0-191

Versions reported by the vendor

Affected version ranges reported by the assigning authority (WDC PSIRT). Independent of NVD's CPE analysis and usually ahead of it.

SanDisk ibi
- before 9.4.0-191affected
Western Digital My Cloud Home and My Cloud Home Duo
- before 9.4.0-191affected
Western Digital My Cloud OS 5
- before 5.26.202affected

Same product

westerndigital: all records

Other highest-scoring records for the same primary product.

CVE-2020-29563An issue was discovered on Western Digital My Cloud OS 5 devices before 5.07.118.
40Plan
CVE-2020-28971An issue was discovered on Western Digital My Cloud OS 5 devices before 5.06.115.
40Plan
CVE-2020-28970An issue was discovered on Western Digital My Cloud OS 5 devices before 5.06.115.
40Plan

Published before and after this one in the same product

← EarlierCVE-2020-28940Dec 1, 2020 · On Western Digital My Cloud OS 5 devices before 5.06.115, the NAS Admin dashboard has an authentication bypass vulnerability that could allo
40Plan
← EarlierCVE-2022-36326May 18, 2023 · Resource Exhaustion Vulnerability in Western Digital devices
19Monitor
Later →CVE-2022-36328May 18, 2023 · Path Traversal Vulnerability leading to an arbitrary file read in Western Digital devices
19Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Claroty Research, Team82 - Vera Mens, Noam Moshe, Uri Katz and Sharon Brizinov working with Trend Micro’s Zero Day Initiativefinder

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

—

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

CVE-2022-363280 days apartPath Traversal Vulnerability leading to an arbitrary file read in Western Digital devices
19Monitor

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-23-0373 · Jun 22, 2023(Apple Güvenlik Güncellemesi)

All national notices →

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-primary

Root cause

A user-supplied file name is joined with the allowed directory, but the result is never checked to confirm it is still inside that directory.

The bug in code

The whole CWE-22 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1const file = path.join(ROOT, req.query.name);
2res.sendFile(file);

Fixed

1const file = path.resolve(ROOT, req.query.name);
2if (!file.startsWith(ROOT + path.sep)) {
3  return res.sendStatus(400);
4}
5res.sendFile(file);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

www.westerndigital.com/support/product-security/wdc-23003-western-digital-my-cloud-home-my-cloud-home-duo-and-sandisk-ibi-firmware-version-9-4-0-191

Show all references (1 more)

www.westerndigital.com/support/product-security/wdc-23006-my-cloud-firmware-version-5-26-202

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records