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Vulnerabilities

Vulnerability · CVE-2019-12257

Wind River VxWorks 6.6 through 6.9 has a Buffer Overflow in the DHCP client component.

Published Aug 9, 2019 · catalog updated Jun 17, 2026 · Wind River VxWorks 6.6

Last checked Nov 2, 2026. A connected source was read within the last 7 days.

Check this week

CVE-2019-12257 is not in CISA KEV. FIRST estimates a 84.30% chance of exploitation in the next 30 days. Check whether you run Wind River VxWorks 6.6.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Wind River VxWorks 6.6).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
84.30%
Remediation
Version ranges on file
Affected products
cpe sonicwall/sonicos · cpe windriver/vxworks

Wind River VxWorks 6.6 through 6.9 has a Buffer Overflow in the DHCP client component. There is an IPNET security vulnerability: Heap overflow in DHCP Offer/ACK parsing inside ipdhcpc.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe sonicwall/sonicos>= 5.9.0.0, <= 5.9.0.7
  • cpe sonicwall/sonicos>= 5.9.1.0., <= 5.9.1.12
  • cpe sonicwall/sonicos>= 6.2.0.0, <= 6.2.3.1
  • cpe sonicwall/sonicos>= 6.2.4.0, <= 6.2.4.3
  • cpe sonicwall/sonicos>= 6.2.5.0, <= 6.2.5.3
  • cpe windriver/vxworks< 6.9.4

How to fix CVE-2019-12257

  • Upgrade

    CVE-2019-12257 lists a fix boundary at 5.9.0.7. Compare the installed build with that boundary before you change production.

  • Version check

    Affected <= 5.9.0.7

  • Advisory

    Open the inventory_critical record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2019-12257 is not in CISA KEV. FIRST estimates a 84.30% chance of exploitation in the next 30 days. Check whether you run Wind River VxWorks 6.6.

Which versions are affected?

Compare what you have installed with >= 5.9.0.0, <= 5.9.0.7, >= 5.9.1.0., <= 5.9.1.12, >= 6.2.0.0, <= 6.2.3.1, >= 6.2.4.0, <= 6.2.4.3, >= 6.2.5.0, <= 6.2.5.3, < 6.9.4. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-120: Classic Buffer Overflow. EPSS 84.30%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

SonicWall SonicOS security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Aug 9, 2019 · Monitored products — critical

    Detected

    Wind River VxWorks 6.6 through 6.9 has a Buffer Overflow in the DHCP client component. There is an IPNET security vulnerability: Heap overflow in DHCP Offer/ACK parsing inside ipdhcpc.

  2. Jun 17, 2026 · Monitored products — critical

    Updated

    Wind River VxWorks 6.6 through 6.9 has a Buffer Overflow in the DHCP client component. There is an IPNET security vulnerability: Heap overflow in DHCP Offer/ACK parsing inside ipdhcpc.

Sources

  • Monitored products — criticalVendor advisoryCVE-2019-12257

    Wind River VxWorks 6.6 through 6.9 has a Buffer Overflow in the DHCP client component. There is an IPNET security vulnerability: Heap overflow in DHCP Offer/ACK parsing inside ipdhcpc.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 2, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • Monitored products — criticalNov 2, 2026