CVE-2021-29092Network attack vector

Authenticated code execution via dangerous file upload

Published Jun 1, 2021 · Updated Sep 16, 2024

Dangerous file upload in Synology Photo Station before 6.8.14-3500 allows remote authenticated users to execute arbitrary code. The file management component accepts a dangerous file type, but Synology has not disclosed the upload endpoint, validation failure, or execution path. A low-privileged authenticated account and network access to Photo Station are required; successful exploitation runs attacker-controlled code on the NAS.

CVSS severity8.8
High
EPSS probability1.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Dangerous file upload in Synology Photo Station before 6.8.14-3500 allows remote authenticated users to execute arbitrary code. The file management component accepts a dangerous file type, but Synology has not disclosed the upload endpoint, validation failure, or execution path. A low-privileged authenticated account and network access to Photo Station are required; successful exploitation runs attacker-controlled code on the NAS.

The record

CVE
CVE-2021-29092
Published
Jun 1, 2021
Updated
Sep 16, 2024
Vendor
Synology
Product
Synology Photo Station
Classifications
CWE-434, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 1, 2021CVE 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

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Is a vulnerable build present?

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

  1. Affected versionversion=unspecified <6.8.14-3500

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Synology · Synology Photo Stationversion=unspecified <6.8.14-3500

Published CVSS scores

8.8Synology Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.5NIST NVDAV:N/AC:L/Au:S/C:P/I:P/A:P

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-434Unrestricted Upload of File with Dangerous Type
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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