Is CVE-2021-29999 actively exploited?

No active exploitation of CVE-2021-29999 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-29999 be exploited remotely?

Yes. CVE-2021-29999 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-29999?

CVE-2021-29999 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2021-29999

CRITICAL

CVE-2021-29999

CWE-787Published: April 13, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

An issue was discovered in Wind River VxWorks through 6.8. There is a possible stack overflow in dhcp server.

NVD Source

Technical Analysis

CVE-2021-29999 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.

From a weakness classification perspective (CWE-787): Out-of-bounds write vulnerabilities can lead to data corruption, crashes, or arbitrary code execution.