What is CVE-2020-16257?

CVE-2020-16257 is a critical-severity vulnerability in Winstonprivacy Winston, classified under OS Command Injection. CVSS score: 9.8/10. Published 2020-10-28.

How severe is CVE-2020-16257?

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

Is CVE-2020-16257 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Winstonprivacy Winston

CVE-2020-16257

Winston 1.5.4 devices are vulnerable to command injection via the API.

Vulnerability class: Command Injection (OS Command Injection)

Published 2020-10-28 · 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: 0.037 (89.4th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.037 · newest: 0.037 · change: 0.000

Affected products

Winstonprivacy Winston
Winstonprivacy Winston Firmware — versions 1.5.4

Weakness classification (CWE)

CWE-78 — OS Command Injection

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

winstonprivacy.com/ (Product)
labs.bishopfox.com/advisories/winston-privacy-version-1.5.4 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-16257?: CVE-2020-16257 is a critical-severity vulnerability in Winstonprivacy Winston, classified under OS Command Injection. CVSS score: 9.8/10. Published 2020-10-28.
How severe is CVE-2020-16257?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2020-16257 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.