CVE-2025-12686: Buffer copy without checking size of input ('Classic Buffer Overflow') vulnerability in AdminCenter in Synolog

Q: How do I fix CVE-2025-12686?

beestation os: upgrade to 1.3.2. Exact commands for each OS are on this page.

Q: Is CVE-2025-12686 being exploited?

CVE-2025-12686 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-12686 affect?

CVE-2025-12686 affects beestation os. Severity is critical (CVSS 9.8). Buffer copy without checking size of input ('Classic Buffer Overflow') vulnerability in AdminCenter in Synology BeeStation OS before 1.3.2-65648 allows remote attackers to execute arbitrary code via unspecified vectors.

Q: How urgent is CVE-2025-12686?

Priority 64/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2025-12686 is a critical-severity flaw (CVSS 9.8) affecting beestation os. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Buffer copy without checking size of input ('Classic Buffer Overflow') vulnerability in AdminCenter in Synology BeeStation OS before 1.3.2-65648 allows remote attackers to execute arbitrary code via unspecified vectors.

Why this priority

Critical severity
CISA SSVC: automatable with total technical impact
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.8% (top 14%)
CISA exploited list	No
Weakness	CWE-120
Published	2026-05-27
Last modified	2026-10-07

Publisher (CNA): Synology Inc. · Vendor: synology

Last updated 2026-10-07 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-27 09:16 UTCPublished CVE record published
2026-10-07 08:10 UTCUpdated Record last modified

synology beestation os UPGRADE

Affected: >= 1.0 and < 1.3.2

Fixed in: 1.3.2

Safe to downgrade to: a release before 1.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Exact fixes by distribution

Fedora ELN · clash-meta · FIXED · 1.19.33-1.eln159 · FEDORA-2026-7dfb64c5e1 · source

sudo dnf upgrade --advisory=FEDORA-2026-7dfb64c5e1

Fedora 46 · vulkan-utility-libraries · FIXED · 1.4.363.0-1.fc46 · FEDORA-2026-994176daf5 · source

sudo dnf upgrade --advisory=FEDORA-2026-994176daf5

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-12686?

beestation os: upgrade to 1.3.2. Exact commands for each OS are on this page.

Is CVE-2025-12686 being exploited?

CVE-2025-12686 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-12686 affect?

CVE-2025-12686 affects beestation os. Severity is critical (CVSS 9.8). Buffer copy without checking size of input ('Classic Buffer Overflow') vulnerability in AdminCenter in Synology BeeStation OS before 1.3.2-65648 allows remote attackers to execute arbitrary code via unspecified vectors.

How urgent is CVE-2025-12686?

Priority 64/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Software pages

Synology vulnerabilities

References

← Back to latest CVEs