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Video StationApplication · Qnap

CVE-2021-44055

CRITICAL · 9.8 CVSS v3.1 Published 2022-05-05
Fix available
A fix is available. Upgrade to 5.1.8 / 5.3.13 or later.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
An missing authorization vulnerability has been reported to affect QNAP device running Video Station. If exploited, this vulnerability allows remote attackers to access data or perform actions that they should not be allowed to perform. We have already fixed this vulnerability in the following versions of Video Station: Video Station 5.5.9 ( 2022/02/16 ) and later

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

This is a missing authorization vulnerability in QNAP Video Station that allows remote unauthenticated attackers to bypass access controls and access data or perform actions they should not be permitted to perform. The CVSS 9.8 score indicates the vulnerability is exploitable over the network and likely requires no authentication, making it easily exploitable.

MitigationUpdate Video Station to version 5.5.9 (released 2022/02/16) or later to remediate this vulnerability.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Video StationApplication
Affected:< 5.1.8>= 5.2.0, < 5.3.13>= 5.4.0, < 5.5.9

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Verify Video Station is installed
    Access QNAP App Center or use QNAP CLI tools to list installed applications and confirm Video Station is present on the system
    Affected if Video Station is installed and running on the QNAP device
  2. Determine the installed Video Station version
    Locate the Video Station version information through QNAP's interface (App Center details) or via command line tools that query installed package versions
    Affected if The installed version cannot be determined or the version is within the affected ranges
  3. Compare installed version against affected ranges
    Check if the installed version falls into any of these ranges: version < 5.1.8, OR version >= 5.2.0 and < 5.3.13, OR version >= 5.4.0 and < 5.5.9
    Affected if The installed version matches any of these three vulnerable ranges
  4. Assess network exposure of Video Station web interface
    Determine if the QNAP device's web interface (port 8080 or 443) hosting Video Station is accessible from untrusted networks
    Affected if The web interface is exposed to the internet or untrusted LAN segments without proper access controls

A user is affected if Video Station is installed and the installed version falls within any of the three vulnerable version ranges, particularly if the web interface is network-accessible.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 5.1.8 / 5.3.13 / 5.5.9 or later
Fixed in 5.1.85.3.135.5.9
Interim mitigation

Update Video Station to version 5.5.9 (released 2022/02/16) or later to remediate this vulnerability.

Recommended fix High confidence

Video Station 5.5.9 or later

  1. 1. Log in to the QNAP NAS web interface
  2. 2. Navigate to the App Center or QTS desktop
  3. 3. Locate Video Station in the installed applications
  4. 4. Check the current version of Video Station installed
  5. 5. If the version is below 5.5.9, update Video Station to version 5.5.9 or later via the QNAP App Center or App Store
  6. 6. Alternatively, enable Auto Update in App Center to automatically receive the security update
  7. 7. After updating, verify the installed version is 5.5.9 or higher

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Video Station Scoped from the published advisory
  • Consultation2.0 h
  • Implementation2.0 h
  • Testing1.0 h
  • Review / QA1.0 h
6.0 hours of engineering $1,090
Get the upgrade done

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $1,744.

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2021-44055 in production — separate from our analysis above.

No notes yet

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What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data