Threadlinqs IntelligenceStart free

VulnerabilityCVE-2026-22899Published 2026-06-10

CVE-2026-22899 — QNAP Systems Inc. File Station 5

low (derived)

As of 2026-06-17, CVE-2026-22899 is a Low-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in QNAP Systems Inc. File Station 5, CVSS v4.0 1.3, EPSS 0.3% (30.0th percentile). Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-22899, most recently “QNAP QSA-26-10: Multiple Injection and Memory-Safety Vulnerabilities in QTS, QuTS hero, QuTS cloud, QVP, and File Station (CVE-2025-66273, CVE-2026-26240, and 12 others)”.

CVSS v4.0
1.3/10Low (derived)
EPSS
0.3%Higher than 30.0% of scored CVEs
CISA KEV
NoNot in the KEV catalog
Tracked threats
1Campaigns referencing it
Priority
1.9/10Threadlinqs triage score
Published
Updated 2026-06-17
CVSS v4.0 1.3 (Low, derived from score) · EPSS 0.3% (higher than 30.0% of all scored CVEs) · Priority 1.9/10 · Published 2026-06-10

Last updated:

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

The record classifies CVE-2026-22899 under weakness class CWE-476. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 140 days ago.

Severity and exploitation probability

CVSS v4.0 base score
1.3 — Low (derived from score)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
EPSS (FIRST)
0.3% probability of exploitation in the next 30 days, higher than 30.0% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
1.9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-06-10, last modified 2026-06-17

Is CVE-2026-22899 being exploited?

It currently carries a trending score of 13 in the Threadlinqs vulnerability feed.

Affected products and versions

How to fix CVE-2026-22899

No vendor patch reference has been recorded for CVE-2026-22899 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-22899

1 tracked threat in the Threadlinqs corpus references CVE-2026-22899, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on .

Other references