CVE-2021-44057Network attack vector

Authenticated compromise of NAS security

Published May 5, 2022 · Updated Sep 16, 2024

Improper authentication in QNAP Photo Station before 5.4.13, 5.7.16, and 6.0.20 allows remote authenticated users to compromise NAS security. QNAP has not disclosed the affected authentication locus or the incorrect operation performed when Photo Station processes requests. The vendor identifies a network path requiring low privileges, but it does not identify the concrete data-access or modification outcome.

CVSS severity7.1
High
EPSS probability0.91%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in QNAP Photo Station before 5.4.13, 5.7.16, and 6.0.20 allows remote authenticated users to compromise NAS security. QNAP has not disclosed the affected authentication locus or the incorrect operation performed when Photo Station processes requests. The vendor identifies a network path requiring low privileges, but it does not identify the concrete data-access or modification outcome.

The record

CVE
CVE-2021-44057
Published
May 5, 2022
Updated
Sep 16, 2024
Vendor
Linn Products Limited
Product
Photo Station
Classifications
CWE-287, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 5, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=unspecified <5.4.13 ( 2022/02/11 )
  2. Affected versionversion=unspecified <5.7.16 ( 2022/02/11 )
  3. Affected versionversion=unspecified <6.0.20 ( 2022/02/15 )

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Linn Products Limited · Photo Stationversion=unspecified <5.4.13 ( 2022/02/11 ); version=unspecified <5.7.16 ( 2022/02/11 ); version=unspecified <6.0.20 ( 2022/02/15 )

Published CVSS scores

10.0NIST NVDAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
7.1QNAP Systems, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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