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PatchSiren cyber security CVE debrief

CVE-2020-11899 Treck TCP/IP stack CVE debrief

CVE-2020-11899 is a Treck TCP/IP stack IPv6 out-of-bounds read vulnerability that CISA added to its Known Exploited Vulnerabilities catalog on 2022-03-03. The supplied corpus does not include version-specific impact or exploitation details, but the KEV listing means defenders should treat it as actively exploited and prioritize remediation using vendor guidance.

Vendor
Treck TCP/IP stack
Product
IPv6
CVSS
MEDIUM 5.4
CISA KEV
Listed
Original CVE published
2022-03-03
Original CVE updated
2022-03-03
Advisory published
2022-03-03
Advisory updated
2022-03-03

Who should care

Organizations that use products or devices embedding the Treck TCP/IP stack, especially any IPv6-enabled deployments, should review exposure promptly. This is most urgent for internet-facing systems and critical infrastructure environments where network-stack vulnerabilities can have broad operational impact.

Technical summary

The available source material identifies the issue as an out-of-bounds read in the Treck TCP/IP stack IPv6 component. The corpus does not provide affected versions, attack conditions, or downstream effects. CISA’s KEV entry records it as a known exploited vulnerability and directs administrators to apply updates per vendor instructions.

Defensive priority

High. CISA listed this CVE in the Known Exploited Vulnerabilities catalog, which indicates confirmed real-world exploitation and a short remediation window in the KEV program (date added: 2022-03-03; due date: 2022-03-17).

Recommended defensive actions

  • Identify products and devices that include the Treck TCP/IP stack IPv6 component.
  • Check vendor guidance for patches, firmware updates, or mitigation steps applicable to your specific product.
  • Apply updates as soon as practical, prioritizing internet-facing and high-value systems.
  • If patching is not immediately possible, reduce exposure by limiting network access to affected devices.
  • Monitor logs and asset inventories for systems that may contain embedded Treck networking components.

Evidence notes

This debrief is based only on the supplied CISA KEV metadata plus the linked official CVE and NVD records. The corpus confirms the vulnerability name, product context, KEV status, and remediation instruction, but it does not include affected version ranges, exploit mechanics, or severity scoring.

Sources and references

Verified primary and authoritative sources

  • CVE-2020-11899 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2020-11899

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2020-11899 NVD vulnerability detail

    Publisher, destination, and source semantics verified

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

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.