CVE-2021-43268

Name: CVE-2021-43268
Creator: NVD / NIST
Published: 2021-11-24T17:15:08.03+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.85%

Last modified Jun 17, 2026

CVE-2021-43268 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. An issue was discovered in VxWorks 6.9 through 7. In the IKE component, a specifically crafted packet may lead to reading beyond the end of a buffer, or a double free.. EPSS estimates a 0.85% chance of exploitation in the next 30 days.

Description

An issue was discovered in VxWorks 6.9 through 7. In the IKE component, a specifically crafted packet may lead to reading beyond the end of a buffer, or a double free.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.85%

53.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-415

Affected Software

Vendor	Product	Versions
Windriver	Vxworks	>= 6.9, <= 7.0

References

https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2021-43268Vendor Advisory
https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2021-43268Vendor Advisory

Timeline

Published: Nov 24, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-43268?

An issue was discovered in VxWorks 6.9 through 7. In the IKE component, a specifically crafted packet may lead to reading beyond the end of a buffer, or a double free.

How severe is CVE-2021-43268?

CVE-2021-43268 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.85% probability of exploitation in the next 30 days.

How do I fix CVE-2021-43268?

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-2021-43268?

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

Scan your code now

Source: NVD / NIST