CVE-2023-41739Network attack vector

Authenticated service interruption

Published Aug 31, 2023 · Updated Sep 27, 2024

Uncontrolled resource consumption in Synology SRM before 1.3.1-9346-6 allows remote authenticated users to interrupt router service. Synology identifies the locus only as File Functionality and has not published the resource, operation, input, or exhaustion mechanism involved. Exploitation requires high-privilege remote authentication and affects availability, with no reported ability to read or alter data.

CVSS severity4.9
Medium
EPSS probability0.78%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uncontrolled resource consumption in Synology SRM before 1.3.1-9346-6 allows remote authenticated users to interrupt router service. Synology identifies the locus only as File Functionality and has not published the resource, operation, input, or exhaustion mechanism involved. Exploitation requires high-privilege remote authentication and affects availability, with no reported ability to read or alter data.

The record

CVE
CVE-2023-41739
Published
Aug 31, 2023
Updated
Sep 27, 2024
Vendor
Synology
Product
Synology Router Manager (SRM)
Classifications
T1499.004
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Aug 31, 2023CVE publishedPublication date reported by the CVE source.
  2. Sep 27, 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=1.3 <1.3.1-9346-6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Synology · Synology Router Manager (SRM)version=1.3 <1.3.1-9346-6

Published CVSS scores

6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.9Synology Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

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

T1499.004Application or System Exploitation

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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