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Vulnerabilities

Vulnerability · CVE-2020-11899

Treck TCP/IP stack Out-of-Bounds Read Vulnerability

Published Jun 17, 2020 · catalog updated Jun 16, 2026 · Treck TCP/IP stack IPv6

Patch now

CVE-2020-11899 is in the CISA known-exploited catalog, due Mar 17, 2022. Confirm Treck TCP/IP stack IPv6 against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Medium5.4
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
18.42%
Remediation
Remediation guidance
Affected products
cpe dell/wyse 5030 firmware · cpe dell/wyse 5050 all-in-one firmware · cpe dell/wyse 7030 firmware · cpe treck/tcp/ip · vendor Treck TCP/IP stack IPv6

The Treck TCP/IP stack contains an IPv6 out-of-bounds read vulnerability.

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 dell/wyse 5030 firmwareversion unspecified
  • cpe dell/wyse 5050 all-in-one firmwareversion unspecified
  • cpe dell/wyse 7030 firmwareversion unspecified
  • cpe treck/tcp/ipversion unspecified
  • vendor Treck TCP/IP stack IPv6version unspecified

How to fix CVE-2020-11899

What to do

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

Should you patch?

CVE-2020-11899 is in the CISA known-exploited catalog, due Mar 17, 2022. Confirm Treck TCP/IP stack IPv6 against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply updates per vendor instructions.

What should an analyst verify?

CWE-125: Out-of-bounds Read. EPSS 18.42%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

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. Jun 17, 2020 · Catalog

    Detected

    The Treck TCP/IP stack contains an IPv6 out-of-bounds read vulnerability.

  2. Mar 3, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Mar 17, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    The Treck TCP/IP stack contains an IPv6 out-of-bounds read vulnerability.

Sources

  • CISA KEVConfirmed exploitationCVE-2020-11899

    The Treck TCP/IP stack contains an IPv6 out-of-bounds read vulnerability.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2020-11899

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2020-11899

    30-day exploitation probability 18.4%

    first.org
  • NIST NVDVulnerability recordCVE-2020-11899

    The Treck TCP/IP stack before 6.0.1.66 has an IPv6 Out-of-bounds Read.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2020-11899

    The Treck TCP/IP stack contains an IPv6 out-of-bounds read vulnerability.

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.