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Vulnerability record · CVE-2016-20009 · published 11 March 2021

CVE-2016-20009: Windriver vxworks out-of-bounds write vulnerability

Windriver · Vxworks

A DNS client stack-based buffer overflow in ipdnsc_decode_name() affects Wind River VxWorks 6.5 through 7. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

9.8 CVSS 3.1 Critical EPSS 1.9% · top 20.5% CWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score, v2 7.5
1.9%EPSS exploitation probability, 30 days
NoNot in CISA KEV
8Affected product versions listed by NVD
4References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A DNS client stack-based buffer overflow in ipdnsc_decode_name() affects Wind River VxWorks 6.5 through 7. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

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

Affected products

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

References

LinkTags
https://blog.exodusintel.com/2016/08/09/vxworks-execute-my-packets/ ExploitThird Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-553445.pdf Third Party Advisory
https://blog.exodusintel.com/2016/08/09/vxworks-execute-my-packets/ ExploitThird Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-553445.pdf Third Party Advisory

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

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Source: NIST National Vulnerability Database (record CVE-2016-20009), CISA KEV, FIRST EPSS (scores of 2026-11-11). This page is refreshed as NVD updates the record.