What is CVE-2022-27966?

CVE-2022-27966 is a medium-severity vulnerability in Microsoft Windows, classified under Unquoted Search Path or Element. CVSS score: 6.5/10. Published 2022-03-31.

How severe is CVE-2022-27966?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Microsoft Windows

CVE-2022-27966

Xshell v7.0.0099 and below contains a binary hijack vulnerability which allows attackers to execute arbitrary code via a crafted .exe file.

Published 2022-03-31 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (39.3th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-428 — Unquoted Search Path or Element

References

www.netsarang.com/en/xshell-update-history/ (Release Notes, Vendor Advisory)
github.com/ycdxsb/Vuln/blob/main/NetSarang-CreateProcessW-Misuse-Binary-Hijack/… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-27966?: CVE-2022-27966 is a medium-severity vulnerability in Microsoft Windows, classified under Unquoted Search Path or Element. CVSS score: 6.5/10. Published 2022-03-31.
How severe is CVE-2022-27966?: Medium severity. CVSS v3 base score is 6.5 out of 10.