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Vulnerability record · CVE-2021-29998 · published 13 April 2021

CVE-2021-29998: Windriver vxworks out-of-bounds write vulnerability

Windriver · Vxworks

An issue was discovered in Wind River VxWorks before 6.5. There is a possible heap overflow in dhcp client.

9.8 CVSS 3.1 Critical EPSS 2.4% · top 16.7% CWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score, v2 7.5
2.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
36Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in Wind River VxWorks before 6.5. There is a possible heap overflow in dhcp client.

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

Affected products

36 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://cert-portal.siemens.com/productcert/pdf/ssa-560465.pdf Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-910883.pdf Third Party Advisory
https://support2.windriver.com/index.php?page=security-notices Vendor Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-194-12 Third Party AdvisoryUS Government Resource
https://cert-portal.siemens.com/productcert/pdf/ssa-560465.pdf Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-910883.pdf Third Party Advisory
https://support2.windriver.com/index.php?page=security-notices Vendor Advisory
https://us-cert.cisa.gov/ics/advisories/icsa-21-194-12 Third Party AdvisoryUS Government Resource

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-29998), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.