CVE-2023-52946Network attack vector

Client crash via unchecked vss buffer copy

Published Sep 26, 2024 · Updated Sep 26, 2024

Classic buffer overflow in Synology Drive Client before 3.5.0-16084 allows remote attackers to crash the client via unspecified vectors. The vss service component copies attacker-controlled input into fixed buffers without checking its size, allowing the write to exceed buffer bounds. No authentication or user interaction is required; successful exploitation overwrites client memory and crashes the desktop client.

CVSS severity8.2
High
EPSS probability0.54%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Classic buffer overflow in Synology Drive Client before 3.5.0-16084 allows remote attackers to crash the client via unspecified vectors. The vss service component copies attacker-controlled input into fixed buffers without checking its size, allowing the write to exceed buffer bounds. No authentication or user interaction is required; successful exploitation overwrites client memory and crashes the desktop client.

The record

CVE
CVE-2023-52946
Published
Sep 26, 2024
Updated
Sep 26, 2024
Vendor
Synology
Product
Synology Drive Client
Classifications
CWE-120, T1489
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 26, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 26, 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=* <3.5.0-16084

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Synology · Synology Drive Clientversion=* <3.5.0-16084

Published CVSS scores

8.2NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
8.2SynologyCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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.

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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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1489Service Stop

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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