How severe is CVE-2022-22991?

CVE-2022-22991 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2022-22991 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-22991?

CVE-2022-22991 affects Westerndigital My Cloud Os. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-22991?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2022-22991 published?

CVE-2022-22991 was published on 2022-01-13 and last updated on 2026-06-17.

CVE-2022-22991

CVE-2022-22991 is a high-severity vulnerability in Westerndigital My Cloud Os with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-77.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 8.3
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Westerndigital My Cloud Os
Published: 2022-01-13
Last modified: 2026-06-17

Description

A malicious user on the same LAN could use DNS spoofing followed by a command injection attack to trick a NAS device into loading through an unsecured HTTP call. Addressed this vulnerability by disabling checks for internet connectivity using HTTP.

Frequently asked questions

What is CVE-2022-22991?: A malicious user on the same LAN could use DNS spoofing followed by a command injection attack to trick a NAS device into loading through an unsecured HTTP call. Addressed this vulnerability by disabling checks for internet connectivity using HTTP.
How severe is CVE-2022-22991?: CVE-2022-22991 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2022-22991 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-22991?: CVE-2022-22991 affects Westerndigital My Cloud Os. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-22991?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2022-22991 published?: CVE-2022-22991 was published on 2022-01-13 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:westerndigital:my_cloud_os:*:*:*:*:*:*:*:*

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