CVE-2021-42952

Name: CVE-2021-42952
Creator: NVD / NIST
Published: 2022-02-25T20:15:08.21+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.9/10EPSS 1.61%

Last modified Jun 17, 2026

CVE-2021-42952 is a critical-severity vulnerability rated 9.9/10 on the CVSS scale. Zepl Notebooks before 2021-10-25 are affected by a sandbox escape vulnerability. Upon launching Remote Code Execution from the Notebook, users can then use that to subsequently escape the running context sandbox and proceed to access internal Zepl assets including cloud metadata services.. EPSS estimates a 1.61% chance of exploitation in the next 30 days.

Description

Zepl Notebooks before 2021-10-25 are affected by a sandbox escape vulnerability. Upon launching Remote Code Execution from the Notebook, users can then use that to subsequently escape the running context sandbox and proceed to access internal Zepl assets including cloud metadata services.

Metrics

CVSS 3.1

9.9/10

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

EPSS Probability

1.61%

72.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Zepl	Zepl	< 2021-10-25

References

http://zepl.comProduct, Vendor Advisory
https://seclists.org/fulldisclosure/2022/Feb/32Mailing List, Third Party Advisory
http://zepl.comProduct, Vendor Advisory
https://seclists.org/fulldisclosure/2022/Feb/32Mailing List, Third Party Advisory

Timeline

Published: Feb 25, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-42952?

How severe is CVE-2021-42952?

CVE-2021-42952 has a CVSS score of 9.9/10 (CRITICAL severity). The EPSS model estimates a 1.61% probability of exploitation in the next 30 days.

How do I fix CVE-2021-42952?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-42952?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST