What is CVE-2021-26564?

CVE-2021-26564 is a high-severity vulnerability in Synology Diskstation Manager (Dsm), classified under Cleartext Transmission of Sensitive Information. CVSS score: 8.3/10. Published 2021-02-26.

How severe is CVE-2021-26564?

High severity. CVSS v3 base score is 8.3 out of 10.

Vulnerability in Synology Diskstation Manager (Dsm)

CVE-2021-26564

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.

EPSS: 0.001 (33.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H.

Affected products

Synology Diskstation Manager (Dsm) — versions unspecified

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

www.synology.com/security/advisory/Synology_SA_20_26 (x_refsource_CONFIRM)
www.talosintelligence.com/vulnerability_reports/TALOS-2020-1160 (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-26564?: CVE-2021-26564 is a high-severity vulnerability in Synology Diskstation Manager (Dsm), classified under Cleartext Transmission of Sensitive Information. CVSS score: 8.3/10. Published 2021-02-26.
How severe is CVE-2021-26564?: High severity. CVSS v3 base score is 8.3 out of 10.