CVE-2025-12686Network attack vector

Unauthenticated code execution via undisclosed buffer overflow

Published May 27, 2026 · Updated May 27, 2026

Classic buffer overflow in AdminCenter in Synology BeeStation OS before 1.3.2-65648 allows remote attackers to execute arbitrary code. Synology identifies an unchecked buffer copy but has not published the affected input, destination buffer, or request path. Authentication and user interaction are not required; the published record does not establish root-level execution or a more specific consequence.

CVSS severity9.8
Critical
EPSS probability2.76%
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 AdminCenter in Synology BeeStation OS before 1.3.2-65648 allows remote attackers to execute arbitrary code. Synology identifies an unchecked buffer copy but has not published the affected input, destination buffer, or request path. Authentication and user interaction are not required; the published record does not establish root-level execution or a more specific consequence.

The record

CVE
CVE-2025-12686
Published
May 27, 2026
Updated
May 27, 2026
Vendor
Synology
Product
BeeStation OS
Classifications
CWE-120
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record 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=1.0 <1.3.2-65648
  2. Affected versionversion=1.1 <1.3.2-65648
  3. Affected versionversion=1.2 <1.3.2-65648
  4. Affected versionversion=1.3 <1.3.2-65648

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Synology · BeeStation OSversion=1.0 <1.3.2-65648; version=1.1 <1.3.2-65648; version=1.2 <1.3.2-65648; version=1.3 <1.3.2-65648

Published CVSS scores

9.8Synology Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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

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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