CVE-2026-24721: QNAP File Station 5: NULL pointer dereference vulnerability
This QNAP advisory covers CVE-2026-24721 in File Station 5.
- CVE-2026-24721
Key facts
- Vendor rating
- Medium, CVSS 5.3
- CVSS vector
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· base score 5.3, scored by qnapAttack vector: network. Attack complexity: low. Attack requirements: none. Privileges required: low. User interaction: none. Confidentiality impact on the vulnerable system: none. Integrity impact on the vulnerable system: none. Availability impact on the vulnerable system: low. Confidentiality impact on subsequent systems: none. Integrity impact on subsequent systems: none. Availability impact on subsequent systems: none.- Weakness
- CWE-476
- EPSS
- 0.28% chance of exploitation in the next 30 days (20th percentile). FIRST EPSS, .
- CISA SSVC
- Exploitation: none observed. Automatable: no. Technical impact: partial. CISA, .
- CISA KEV
- Not listed (catalogue checked )
- Affected
- File Station 5 5.5.x before 5.5.6.5243
- Fixed in
- 5.5.6.5243
- Source published
- Source revised
- Listed by VulniPulse
- Record changed
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
Description
A NULL pointer dereference vulnerability has been reported to affect File Station 5. 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 5.5.6.5243 and later
Text from the source record.
- File Station 5 5.5.x before 5.5.6.5243
NVD record · high-confidence parse· fetched ·verify at source
How to fix CVE-2026-24721
Upgrade to a fixed release named by QNAP:
- 5.5.6.5243
More QNAP advisories
CVE-2026-24723Oct 15, 2026File Station 5: NULL pointer dereference vulnerabilityCVE-2026-24722Oct 15, 2026File Station 5: NULL pointer dereference vulnerabilityCVE-2025-62841Oct 29, 2026HBS 3 Hybrid Backup Sync and Hybrid Backup Sync: Hybrid Backup Sync: use of hard-codedCVE-2025-62839Oct 29, 2026HBS 3 Hybrid Backup Sync and Hybrid Backup Sync: Hybrid Backup Sync: use of hard-codedCVE-2026-50619Oct 15, 2026Qsirch: path traversal vulnerabilityCVE-2026-47790Oct 15, 2026QuFTP Service: cross-site scripting (XSS) vulnerability
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