What is CVE-2023-32956?

CVE-2023-32956 is a critical-severity vulnerability in Synology Router Manager, classified under CWE-78: IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND ('OS COMMAND INJECTION'). CVSS score: 9.8/10. Published 2023-05-16.

How severe is CVE-2023-32956?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Synology Router Manager

CVE-2023-32956

Improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability in CGI component in Synology Router Manager (SRM) before 1.2.5-8227-6 and 1.3.1-9346-3 allows remote attackers to execute arbitrary code via unspecified vectors.

Published 2023-05-16 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.015 (74.4th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 74.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · change: 0.000

Affected products

Synology Router Manager
Synology Router Manager (Srm) — versions 1.3, 1.2

References

www.synology.com/en-global/security/advisory/Synology_SA_22_25 (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2023-32956?: CVE-2023-32956 is a critical-severity vulnerability in Synology Router Manager, classified under CWE-78: IMPROPER NEUTRALIZATION OF SPECIAL ELEMENTS USED IN AN OS COMMAND ('OS COMMAND INJECTION'). CVSS score: 9.8/10. Published 2023-05-16.
How severe is CVE-2023-32956?: Critical severity. CVSS v3 base score is 9.8 out of 10.