Is CVE-2021-42950 in the CISA KEV catalog?

No. CVE-2021-42950 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-42950?

CVE-2021-42950 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2021-42950?

CVE-2021-42950 has an EPSS score of 1.65% (74th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-42950?

Upgrade zepl to 2021-10-25 or later.

CVE & CISA-KEV Catalog

CVE-2021-42950

HIGHEPSS 74th pctl

8.8

CVSS v3

NVD

Description

Remote Code Execution (RCE) vulnerability exists in Zepl Notebooks all previous versions before October 25 2021. Users can register for an account and are allocated a set number of credits to try the product. Once users authenticate, they can proceed to create a new organization by which additional users can be added for various collaboration abilities, which allows malicious user to create new Zepl Notebooks with various languages, contexts, and deployment scenarios. Upon creating a new notebook with specially crafted malicious code, a user can then launch remote code execution.

How to fix

Remediation Available

zeplNVD

Affected:< 2021-10-25Fixed in:2021-10-25CVE-2021-42950derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.65%probability of exploitation in 30 days

74thpercentile

Elevated risk: more likely to be exploited than 74% of all known CVEs.

References

Vendor Advisory1

zepl.com

Third-Party Advisory1

seclists.org

Embed a live status badge for CVE-2021-42950

Markdown

[![CVE-2021-42950](https://tridentstack.com/cve/badge/CVE-2021-42950.svg)](https://tridentstack.com/cve/CVE-2021-42950)

HTML

<a href="https://tridentstack.com/cve/CVE-2021-42950"><img src="https://tridentstack.com/cve/badge/CVE-2021-42950.svg" alt="CVE-2021-42950"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-05.