Synology Active Backup for Microsoft 365 insufficiently protected credentials

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability was found in Synology Active Backup for Microsoft 365. It has been rated as problematic. This affects an unknown part. Performing a manipulation results in insufficiently protected credentials. This vulnerability is reported as CVE-2025-4679. The attack is possible to be carried out remotely. No exploit exists. This product is provided as a managed service, meaning users do not have the ability to maintain vulnerability countermeasures themselves.

Detailsinfo

A vulnerability classified as problematic has been found in Synology Active Backup for Microsoft 365 (version unknown). This affects an unknown function. The manipulation with an unknown input leads to a insufficiently protected credentials vulnerability. CWE is classifying the issue as CWE-522. The product transmits or stores authentication credentials, but it uses an insecure method that is susceptible to unauthorized interception and/or retrieval. This is going to have an impact on confidentiality. The summary by CVE is:

A vulnerability in Synology Active Backup for Microsoft 365 allows remote authenticated attackers to obtain sensitive information via unspecified vectors.

The weakness was disclosed by Thorsten Schröder as SA_25_06. It is possible to read the advisory at synology.com. This vulnerability is uniquely identified as CVE-2025-4679 since 05/14/2025. The exploitability is told to be easy. It is possible to initiate the attack remotely. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1552 according to MITRE ATT&CK.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-15423). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

License

Managed Service

  • yes

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.8
VulDB Meta Temp Score: 5.7

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CNA Base Score: 6.5
CNA Vector (synology): 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Insufficiently protected credentials
CWE: CWE-522
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Status: 🔍

0-Day Time: 🔍

Timelineinfo

05/14/2025 🔍
05/16/2025 +2 days 🔍
05/16/2025 +0 days 🔍
05/31/2025 +15 days 🔍

Sourcesinfo

Vendor: synology.com

Advisory: SA_25_06
Researcher: Thorsten Schröder
Status: Confirmed

CVE: CVE-2025-4679 (🔍)
GCVE (CVE): GCVE-0-2025-4679
GCVE (VulDB): GCVE-100-309267
EUVD: 🔍

Entryinfo

Created: 05/16/2025 10:53
Updated: 05/31/2025 06:04
Changes: 05/16/2025 10:53 (63), 05/16/2025 13:06 (1), 05/31/2025 06:04 (12)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

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