How severe is CVE-2026-22899?

CVE-2026-22899 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2026-22899 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-22899?

CVE-2026-22899 affects Qnap File Station. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-22899?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-22899 have an EU (EUVD) identifier?

Yes. CVE-2026-22899 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35973.

When was CVE-2026-22899 published?

CVE-2026-22899 was published on 2026-06-10 and last updated on 2026-06-17.

CVE-2026-22899

CVE-2026-22899 is a medium-severity vulnerability in Qnap File Station with a CVSS 3.x base score of 6.5. 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 1.3
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35973
Weakness: CWE-476
Affected product: Qnap File Station
Published: 2026-06-10
Last modified: 2026-06-17

Description

A NULL pointer dereference vulnerability has been reported to affect File Station 6. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the vulnerability in the following version: File Station 5 5.5.6.5208 and later

Frequently asked questions

What is CVE-2026-22899?: A NULL pointer dereference vulnerability has been reported to affect File Station 6. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the vulnerability in the following version: File Station 5 5.5.6.5208 and later
How severe is CVE-2026-22899?: CVE-2026-22899 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2026-22899 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-22899?: CVE-2026-22899 affects Qnap File Station. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-22899?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-22899 have an EU (EUVD) identifier?: Yes. CVE-2026-22899 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35973.
When was CVE-2026-22899 published?: CVE-2026-22899 was published on 2026-06-10 and last updated on 2026-06-17.

References

https://www.qnap.com/en/security-advisory/qsa-26-10

Affected products (1)

cpe:2.3:a:qnap:file_station:*:*:*:*:*:*:*:*

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