Your RSA-2048 keys break in 2030. Find every one of them before attackers do.
📦
📦 npm
Not in CISA KEV
CRITICAL severity

CVE-2021-27185 — samba-client

CRITICALFix: eflexsystems/node-samba-client@5bc3bba

CVE-2021-27185 is a critical-severity (CVSS 9.8) CWE-77 vulnerability in samba-client. 1 public exploit reference exists, so weaponization risk is real. A fix is available for samba-client — see the affected versions and patch details below.

Command injection in samba-client

Also known asGHSA-r3j7-x2g5-9gx6
Published
Updated
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Oct 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
4.8%probability of exploitation in next 30 days
Lower Risk0.00%
Lower risk than most CVEs92th percentile — riskier than 92% of all scored CVEsHighest risk
0.48%8.22%16.0%23.7%14.5%4.8%Apr 26Aug 26Oct 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2021-27185 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,738 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

5other npm packages depend on this — each one inherits the vulnerability until it's patched upstream
samba-clientnpm
49Kdownloads / week

Description

The samba-client package before 4.0.0 for Node.js allows command injection because of the use of process.exec.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmsamba-clientall versions4.0.0npm install samba-client@4.0.0

Affected Products

1 product · 1 configurations
Application
samba-clientsamba-client_project
< 4.0.0
range
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

The samba-client package before 4.0.0 for Node.js allows command injecti…

advisory.checkmarx.netNVDApr 2022

Detection & mitigation playbook

Open-source dependency

  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for samba-client, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update samba-client to 4.0.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2021-27185 is resolved across your whole dependency graph.

  3. Workarounds

    Stop passing untrusted input into the interpreter or shell: call the affected binary with an argument array rather than a composed command string, reject anything outside a strict allowlist of expected values, and run the component under an account that cannot reach beyond the work it legitimately does.

Frequently Asked Questions

The samba-client package before 4.0.0 for Node.js allows command injection because of the use of process.exec.
O3 Security · Impact-Aware SCA

Is CVE-2021-27185 in your dependencies?

Find it across npm, including transitive dependencies.

Scan my dependencies How O3 SCA works
CVE-2021-27185: samba-client — Fixed in 4.0.0