CVE-2024-13987Network attack vector

Limited file access via undisclosed cross-site scripting

Published Aug 29, 2025 · Updated Sep 1, 2025

Cross-site scripting in affected Synology RADIUS Server releases allows remote authenticated users to read or write limited files in SRM. Synology has not disclosed the affected interface, input, or web-page-generation operation that fails to neutralize untrusted data. Administrator privileges and user interaction are required; reported effects also include limited denial of service.

CVSS severity5.9
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in affected Synology RADIUS Server releases allows remote authenticated users to read or write limited files in SRM. Synology has not disclosed the affected interface, input, or web-page-generation operation that fails to neutralize untrusted data. Administrator privileges and user interaction are required; reported effects also include limited denial of service.

The record

CVE
CVE-2024-13987
Published
Aug 29, 2025
Updated
Sep 1, 2025
Vendor
Synology
Product
RADIUS Server
Classifications
CWE-79
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 29, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 1, 2025Record 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=* <3.0.27-0139
  2. Affected versionversion=* <3.0.27-0453
  3. Affected versionversion=* <3.0.27-0516

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Synology · RADIUS Serverversion=* <3.0.27-0139; version=* <3.0.27-0453; version=* <3.0.27-0516

Published CVSS scores

5.9Synology Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:L

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-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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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