CVE-2020-11899
5.4, medium Known exploitedTreck TCP/IP stack Out-of-Bounds Read Vulnerability
- CVSS
- 5.4, medium medium CVSS v3.1
- EPSS, next 30 days
- 18% higher than 97.2% of scored CVEs
- Exploitation
- Confirmed in the wild
- Published
- 17 Jun 20206 years ago
Known exploited
CISA added this to the Known Exploited Vulnerabilities Catalog on 3 Mar 2022. US federal agencies had to remediate by 17 Mar 2022, a deadline that has passed.
Required action. Apply updates per vendor instructions.
Description
The Treck TCP/IP stack before 6.0.1.66 has an IPv6 Out-of-bounds Read.
Details
- Vendor
- Treck TCP/IP stack and 1 more
- Product
- Tcp/ip
- Weakness
- CWE-125 (opens in a new tab)
- Status
- Analyzed
- Updated
- 17 Jun 2026
- Assigner
- cve@mitre.org
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
References 12
Exploit code 1
Advisories 9
- arubanetworks.com /assets/alert/ARUBA-PSA-2020-006.txt (opens in a new tab)
- jsof-tech.com /vulnerability-disclosure-policy/ (opens in a new tab)
- security.netapp.com /advisory/ntap-20200625-0006/ (opens in a new tab)
- tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-treck-ip-stack-JyBQ5GyC (opens in a new tab)
- dell.com /support/article/de-de/sln321836/dell-response-to-the-ripple20-vulnerabilities (opens in a new tab)
- intel.com /content/www/us/en/security-center/advisory/intel-sa-00295.html (opens in a new tab)
- kb.cert.org /vuls/id/257161 (opens in a new tab)
- kb.cert.org /vuls/id/257161/ (opens in a new tab)
The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.
Beyond this page
Is CVE-2020-11899 in your network?
This page tells you how dangerous CVE-2020-11899 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.
CVE-2020-11899 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.
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EXYS7600 OCELOT
Find it before attackers do
Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2020-11899 comes with the devices to patch.
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EXYS7950 KONDRA
Detect it if it's exploited
Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.
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Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 17 Oct 2026, not the live upstream state.