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Critical

Remote Code Execution in Synology BeeStation AdminCenter

IdentifiersCVE-2025-12686CWE-120· Buffer Copy without Checking Size…

CVE-2025-12686 is a classic buffer overflow vulnerability in AdminCenter affecting Synology BeeStation Manager (BSM) and Synology BeeStation OS before version 1.3.2-65648. The issue is described as a buffer copy operation performed without proper input size checking, resulting in a stack or heap memory corruption condition. The vulnerable component is identified as AdminCenter, but the specific function, endpoint, and triggering input are not disclosed in the provided content. Successful exploitation allows a remote attacker to execute arbitrary code via unspecified vectors.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can lead to arbitrary code execution on the affected Synology BeeStation device. Based on the provided CVSS v3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H), the vulnerability is remotely exploitable over the network, requires no authentication and no user interaction, and can result in complete compromise of confidentiality, integrity, and availability. An attacker could potentially run attacker-controlled code, access or alter stored data and system configuration, and disrupt device operation.

Mitigation

If you can’t patch tonight, do this now.

If immediate patching is not possible, reduce exposure of the AdminCenter service by restricting network access to trusted management hosts only, disabling or isolating external access, and placing affected devices behind firewall rules or VPN-only administrative access. Monitor for suspicious access attempts to BeeStation management interfaces and minimize direct Internet exposure until the fixed version is deployed. No vendor-specific workaround beyond upgrading is provided in the supplied content.

Remediation

Patch, then assume compromise.

Upgrade Synology BeeStation Manager (BSM) and Synology BeeStation OS to version 1.3.2-65648 or later, as indicated by Synology advisory Synology_SA_25_12. Systems running versions prior to 1.3.2-65648 should be considered vulnerable and updated on an expedited basis.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
SynologyBeestation Manageroperating_system
SynologyBeestation Osoperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

9 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

9 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity7

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2025-12686
NVD
nvd.nist.gov/vuln/detail/CVE-2025-12686
MITRE CWE · CWE-120
Buffer Copy without Checking Size of Input…
Vendor Advisory
synology.com/en-global/security/advisory/Synology_SA_25_12