CVE-2025-54159VulnerabilityPublished 4 Dec 2025

CVE-2025-54159: Synology BeeDrive for desktop · Missing Authorization

Affects Synology BeeDrive for desktopSource CVE Database V5

Not known to be exploited · CVSS 7.5 High.

Data as of 26 Oct 2026, 07:57 UTC

CVSS 3.1 base score

7.5High

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.4% chance of exploitation in 30 days – higher than 35% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: High
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: None: There is no loss of confidentiality within the impacted component.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 4 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-26.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Synology BeeDrive for desktop	Affected *	Fixed in–

AI-suggested

1. Immediately update Synology BeeDrive for desktop to version 1.4.2-13960 or later where the vulnerability is patched. 2. Restrict network access to BeeDrive services by implementing firewall rules and network segmentation to limit exposure to trusted internal networks only. 3. Disable remote access features or VPN connections to BeeDrive if not strictly necessary. 4. Monitor file deletion logs and audit trails for unusual or unauthorized activities to detect potential exploitation attempts early. 5. Implement strict access controls and user permissions on systems running BeeDrive to minimize the impact of any unauthorized actions. 6. Regularly back up critical data stored or synchronized via BeeDrive to secure, offline, or immutable storage to enable recovery in case of data deletion. 7. Educate IT staff and users about the vulnerability and the importance of applying updates promptly. 8. Consider deploying endpoint detection and response (EDR) tools to identify suspicious behaviors related to file deletions on affected endpoints.

Description

Missing authorization vulnerability in BeeDrive in Synology BeeDrive for desktop before 1.4.2-13960 allows remote attackers to delete arbitrary files via unspecified vectors.

Impact

For European organizations, this vulnerability poses a significant risk to data integrity and operational continuity. Organizations using Synology BeeDrive for desktop to manage or synchronize files could suffer unauthorized file deletions, leading to data loss, disruption of business processes, and potential compliance violations under regulations like GDPR if data availability or integrity is compromised. Critical sectors such as finance, healthcare, and government agencies that rely on Synology solutions for secure file storage and sharing may face operational downtime or costly recovery efforts. The ease of exploitation without authentication increases the threat surface, especially if the BeeDrive service is exposed to untrusted networks or the internet. While confidentiality is not directly impacted, the loss of important files could indirectly affect data confidentiality if backups or logs are deleted. The absence of known exploits currently provides a window for mitigation, but the high CVSS score (7.5) and the nature of the vulnerability demand immediate attention to prevent potential targeted attacks or insider threats exploiting this flaw.

References

synology.com/en-global/security/advisory/Synology_SA_25_08 (opens in a new tab)

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 4 Dec 2025, 15:44 UTC

Technical details

References

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