What is CVE-2021-26560?

CVE-2021-26560 is a critical-severity vulnerability in Synology Diskstation_manager, classified under Cleartext Transmission of Sensitive Information. CVSS score: 9.0/10. Published 2021-02-26.

How severe is CVE-2021-26560?

Critical severity. CVSS v3 base score is 9.0 out of 10.

Vulnerability in Synology Diskstation_manager

CVE-2021-26560

Cleartext transmission of sensitive information vulnerability in synoagentregisterd 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: 0.007 (48.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.

Affected products

Synology Diskstation_manager
Synology Diskstation_manager_unified_controller — versions 3.0
Synology Skynas
Synology Skynas_firmware
Synology Diskstation Manager (Dsm) — versions unspecified
Synology Uc3200
Synology Vs960hd
Synology Vs960hd_firmware

Weakness classification (CWE)

CWE-319 — Cleartext Transmission of Sensitive Information

References

security@synology.com (x_refsource_CONFIRM, Vendor Advisory)
security@synology.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-26560?: CVE-2021-26560 is a critical-severity vulnerability in Synology Diskstation_manager, classified under Cleartext Transmission of Sensitive Information. CVSS score: 9.0/10. Published 2021-02-26.
How severe is CVE-2021-26560?: Critical severity. CVSS v3 base score is 9.0 out of 10.