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No exploitation reportedFix available

CVE-2016-20009

No exploitation reported by the sources we read.

  • Published2021-03-11
  • WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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

Timeline

dates in UTC
  1. 2021-03-1122:15CVE publishedNVD

Versions per branch

NVD
Siemens sgt-100 firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published
Siemens sgt-200 firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published
Siemens sgt-300 firmwareversion to verify
BranchAffectedFixed in
—all versionsno fix published

5 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • ICSA-21-222-06 CISA7 known affected

    Siemens Energy AGT and SGT Solutions

    SGT-100 · SGT-200 · SGT-300 · +4 more

  • SSA-553445 Siemens ProductCERT7 known affected

    SSA-553445: DNS "Name:Wreck" Vulnerabilities in Multiple Siemens Energy AGT and SGT solutions

    SGT-100 · SGT-200 · SGT-300 · +4 more

Full record on NVD

Fix

  1. Vendor fix Siemens ProductCERT SSA-553445 · 7 productsAs only Rockwell Automation / Allen Bradley components are affected, please see Rockwell Security Advisory PN1564 for affected parts and software/firmware updates. Some updates may not be compatible with other components in the system. Contact Siemens Energy for further support.
  2. Vendor fix CISA ICSA-21-222-06 · 7 productsAs only Rockwell Automation / Allen Bradley components are affected, please see Rockwell Security Advisory PN1564 for affected parts and software/firmware updates. Some updates may not be compatible with other components in the system. Contact Siemens Energy for further support.
  3. Mitigation from the vendor Siemens ProductCERT SSA-553445 · 7 productsWhile firmware updates are suggested in the original advisory as solutions, the updates may not be compatible with the software or other components in the system. Please contact your local Siemens Energy representative for an assessment.
  4. Mitigation from the vendor Siemens ProductCERT SSA-553445 · 7 productsFor more details on how to mitigate this vulnerability, see Rockwell Security Advisory PN1564 (https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1131196, Login required)
  5. Mitigation from the vendor CISA ICSA-21-222-06 · 7 productsWhile firmware updates are suggested in the original advisory as solutions, the updates may not be compatible with the software or other components in the system. Please contact your local Siemens Energy representative for an assessment.
  6. Mitigation from the vendor CISA ICSA-21-222-06 · 7 productsFor more details on how to mitigate this vulnerability, see Rockwell Security Advisory PN1564 (https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1131196, Login required)

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2021-03-11
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-347g-p4qh-9qw2

Frequently asked questions

What is CVE-2016-20009?

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

Is CVE-2016-20009 actively exploited?

Active exploitation of CVE-2016-20009 has not been confirmed. Its EPSS score was 1.9% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2016-20009?

CVE-2016-20009 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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