CVE-2020-27654

Name: CVE-2020-27654
Creator: NVD / NIST
Published: 2020-10-29T09:15:13.31+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 4.63%

Last modified Jun 17, 2026

CVE-2020-27654 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. Improper access control vulnerability in lbd in Synology Router Manager (SRM) before 1.2.4-8081 allows remote attackers to execute arbitrary commands via port (1) 7786/tcp or (2) 7787/tcp.. EPSS estimates a 4.63% chance of exploitation in the next 30 days.

Description

Improper access control vulnerability in lbd in Synology Router Manager (SRM) before 1.2.4-8081 allows remote attackers to execute arbitrary commands via port (1) 7786/tcp or (2) 7787/tcp.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

4.63%

90.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Synology	Router Manager	< 1.2.4-8081

References

https://www.synology.com/security/advisory/Synology_SA_20_14Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1064Exploit, Third Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1065Exploit, Third Party Advisory
https://www.synology.com/security/advisory/Synology_SA_20_14Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1064Exploit, Third Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1065Exploit, Third Party Advisory

Timeline

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

Frequently Asked Questions

What is CVE-2020-27654?

Improper access control vulnerability in lbd in Synology Router Manager (SRM) before 1.2.4-8081 allows remote attackers to execute arbitrary commands via port (1) 7786/tcp or (2) 7787/tcp.

How severe is CVE-2020-27654?

CVE-2020-27654 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 4.63% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27654?

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-2020-27654?

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

Scan your code now

Source: NVD / NIST