CVE-2020-27650

Name: CVE-2020-27650
Creator: NVD / NIST
Published: 2020-10-29T09:15:12.793+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.7/10EPSS 0.55%

Last modified Jun 17, 2026

CVE-2020-27650 is a low-severity vulnerability rated 3.7/10 on the CVSS scale. Synology DiskStation Manager (DSM) before 6.2.3-25426-2 does not set the Secure flag for the session cookie in an HTTPS session, which makes it easier for remote attackers to capture this cookie by intercepting its transmission within an HTTP session.. EPSS estimates a 0.55% chance of exploitation in the next 30 days.

Description

Synology DiskStation Manager (DSM) before 6.2.3-25426-2 does not set the Secure flag for the session cookie in an HTTPS session, which makes it easier for remote attackers to capture this cookie by intercepting its transmission within an HTTP session.

Metrics

CVSS 3.1

3.7/10

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

EPSS Probability

0.55%

41.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Synology	Diskstation Manager	>= 6.2, < 6.2.3-25426-2
Synology	Skynas Firmware	< 6.2.3-25426

References

https://www.synology.com/security/advisory/Synology_SA_20_18Vendor Advisory
https://www.synology.com/security/advisory/Synology_SA_20_18Vendor Advisory

Timeline

Published: Oct 29, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27650?

How severe is CVE-2020-27650?

CVE-2020-27650 has a CVSS score of 3.7/10 (LOW severity). The EPSS model estimates a 0.55% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27650?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-27650?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST