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

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

Published Jun 17, 2020 · Updated May 16, 2026

Why patchRisk explained in plain English

Worst-case scenarioIf unpatched

An attacker, without authentication, can achieve partial data exposure, partial data tampering, partial service disruption. Federal agencies are required to remediate by 2022-03-17 under CISA BOD 22-01.

How the attack worksNo clicks needed

This is a Out-of-bounds Read (CWE-125) vulnerability in Treck TCP/IP stack IPv6. The Treck TCP/IP stack before 6.0.1.66 has an IPv6 Out-of-bounds Read. Exploitation requires adjacent_network access, low attack complexity, no authentication required, and no user interaction required.

Am I affected?Quick check

Probably yes if any of these apply:

●IT Security

●Running tcp\/ip: v < 6.0.1.66; wyse 5050 all-in-one firmware: -; wyse 7030 firmware: -; wyse 5030 firmware: -

Real-world incidentsWhat we've seen

Active exploitation documented in the wild. Threat-research write-up: https://cwe.mitre.org/data/definitions/125.html

How to patch

Manual remediation steps

Apply the Vendor Patch

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog — apply the vendor's security update as soon as possible.

CISA required action: Apply updates per vendor instructions.

References

Vendor advisory: https://www.treck.com

NVD entry: https://nvd.nist.gov/vuln/detail/CVE-2020-11899

CISA KEV: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-11899

PowerShell automationComing soon

No tested PowerShell script for this entry yet. We’re prioritising automation based on user demand.

References

↗ CVE-2020-11899 ↗ NVD ↗ Vendor Advisory