Synology DiskStation Manager up to 6.2.3-25423 HTTP Session channel accessible

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Synology DiskStation Manager. The impacted element is an unknown function of the component HTTP Session Handler. Executing a manipulation can lead to channel accessible. This vulnerability appears as CVE-2021-26564. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Synology DiskStation Manager (Network Attached Storage Software) and classified as problematic. This vulnerability affects an unknown code block of the component HTTP Session Handler. The manipulation with an unknown input leads to a channel accessible vulnerability. The CWE definition for the vulnerability is CWE-300. The product does not adequately verify the identity of actors at both ends of a communication channel, or does not adequately ensure the integrity of the channel, in a way that allows the channel to be accessed or influenced by an actor that is not an endpoint. As an impact it is known to affect confidentiality.

The weakness was presented 02/27/2021 as SA_20_26. The advisory is available at synology.com. This vulnerability was named CVE-2021-26564. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1557 by the MITRE ATT&CK project.

Upgrading to version 6.2.3-25426-3 eliminates this vulnerability.

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Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.7

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.7
NVD Vector: 🔍

CNA Base Score: 8.3
CNA Vector (Synology Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Channel accessible
CWE: CWE-300
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

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: DiskStation Manager 6.2.3-25426-3

Timelineinfo

02/02/2021 🔍
02/27/2021 +25 days 🔍
02/27/2021 +0 days 🔍
05/04/2025 +1527 days 🔍

Sourcesinfo

Vendor: synology.com

Advisory: SA_20_26
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-26564 (🔍)
GCVE (CVE): GCVE-0-2021-26564
GCVE (VulDB): GCVE-100-170518

Entryinfo

Created: 02/27/2021 08:17
Updated: 05/04/2025 05:38
Changes: 02/27/2021 08:17 (39), 03/05/2021 21:06 (6), 03/05/2021 21:09 (1), 03/14/2021 07:16 (18), 01/15/2025 07:16 (32), 05/04/2025 05:38 (3)
Complete: 🔍
Cache ID: 216::103

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