CVE-2022-27621Network attack vector

Arbitrary file access via webapi path traversal

Published Aug 3, 2022 · Updated Sep 17, 2024

Path traversal in Synology USB Copy before 2.2.0-1086 allows remote authenticated users to read or write arbitrary files. The webapi component fails to constrain a supplied pathname to its intended directory; Synology has not disclosed the affected endpoint or parameter. Administrator-group access is required, and successful exploitation exposes or alters files reachable by the package without interrupting service.

CVSS severity5.5
Medium
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Synology USB Copy before 2.2.0-1086 allows remote authenticated users to read or write arbitrary files. The webapi component fails to constrain a supplied pathname to its intended directory; Synology has not disclosed the affected endpoint or parameter. Administrator-group access is required, and successful exploitation exposes or alters files reachable by the package without interrupting service.

The record

CVE
CVE-2022-27621
Published
Aug 3, 2022
Updated
Sep 17, 2024
Vendor
Synology
Product
USB Copy
Classifications
CWE-22, T1565.001, T1005
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 3, 2022CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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 <2.2.0-1086

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Synology · USB Copyversion=unspecified <2.2.0-1086

Published CVSS scores

5.5SynologyCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1565.001Stored Data Manipulation
T1005Data from Local System

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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