CVE-2020-27651

Name: CVE-2020-27651
Creator: NVD / NIST
Published: 2020-10-29T09:15:12.903+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 0.76%

Last modified Jun 17, 2026

CVE-2020-27651 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. Synology Router Manager (SRM) before 1.2.4-8081 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 0.76% chance of exploitation in the next 30 days.

Description

Synology Router Manager (SRM) before 1.2.4-8081 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

8.1/10

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

EPSS Probability

0.76%

50.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Synology	Router Manager	>= 1.2, < 1.2.4-8081

References

https://www.synology.com/security/advisory/Synology_SA_20_14Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1059Exploit, Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_20_14Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1059Exploit, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2020-27651?

How severe is CVE-2020-27651?

CVE-2020-27651 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.76% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27651?

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-2020-27651?

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

Scan your code now

Source: NVD / NIST