How severe is CVE-2022-4221?

CVE-2022-4221 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2022-4221 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-4221?

CVE-2022-4221 affects Asus Nas-m25 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-4221?

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

When was CVE-2022-4221 published?

CVE-2022-4221 was published on 2022-12-01 and last updated on 2026-06-17.

CVE-2022-4221

CVE-2022-4221 is a critical-severity vulnerability in Asus Nas-m25 Firmware with a CVSS 3.x base score of 9.8. 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Asus Nas-m25 Firmware
Published: 2022-12-01
Last modified: 2026-06-17

Description

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Asus NAS-M25 allows an unauthenticated attacker to inject arbitrary OS commands via unsanitized cookie values.This issue affects NAS-M25: through 1.0.1.7.

Frequently asked questions

What is CVE-2022-4221?: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability in Asus NAS-M25 allows an unauthenticated attacker to inject arbitrary OS commands via unsanitized cookie values.This issue affects NAS-M25: through 1.0.1.7.
How severe is CVE-2022-4221?: CVE-2022-4221 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2022-4221 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-4221?: CVE-2022-4221 affects Asus Nas-m25 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-4221?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2022-4221 published?: CVE-2022-4221 was published on 2022-12-01 and last updated on 2026-06-17.

References

https://onekey.com/blog/security-advisory-asus-m25-nas-vulnerability/

Affected products (1)

cpe:2.3:o:asus:nas-m25_firmware:*:*:*:*:*:*:*:*

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