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CVE-2021-26564

HIGH
Published 2021-02-26T21:45:33.663943Z
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CVSS Score

V3.1
8.3
/10
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.002
probability
of exploitation in the wild

There is a 0.2% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.367
Higher than 36.7% of all CVEs

Attack Vector Metrics

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Description

Cleartext transmission of sensitive information vulnerability in synorelayd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-middle attackers to spoof servers via an HTTP session.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

Synology

Synology DiskStation Manager (DSM)

Affected Versions:

unspecified

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

⚠ Unreviewed MODERATE

GHSA-77r2-rjfh-m7wh

Advisory Details

Cleartext transmission of sensitive information vulnerability in synorelayd in Synology DiskStation Manager (DSM) before 6.2.3-25426-3 allows man-in-the-middle attackers to spoof servers via an HTTP session.

CVSS Scoring

CVSS Score

5.0

CVSS Vector

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

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2021-26564
WEB https://www.synology.com/security/advisory/Synology_SA_20_26
WEB https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1160

Advisory provided by GitHub Security Advisory Database. Published: May 24, 2022, Modified: May 24, 2022

References

https://www.synology.com/security/advisory/Synology_SA_20_26
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1160
Published: 2021-02-26T21:45:33.663943Z
Last Modified: 2024-09-17T00:46:03.051Z
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