What is CVE-2020-11899?

CVE-2020-11899 is a medium-severity vulnerability in Dell Wyse 5030, classified under Out-of-bounds Read. CVSS score: 5.4/10. Published 2020-06-17.

How severe is CVE-2020-11899?

Medium severity. CVSS v3 base score is 5.4 out of 10.

Is CVE-2020-11899 known to be exploited?

Yes. CVE-2020-11899 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03), indicating it is being actively exploited. 8 public proof-of-concept repositories are indexed.

Out-of-bounds Read in Dell Wyse 5030

CVE-2020-11899

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

Vulnerability class: Buffer Overflow

Published 2020-06-17 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.

EPSS exploit prediction

EPSS: 0.184 (97.2th percentile), scored 2026-10-20.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 97.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.186 · newest: 0.184 · change: -0.001

Affected products

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-03-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-03-17.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

cwe.mitre.org/data/definitions/125.html (Technical Description)
www.kb.cert.org/vuls/id/257161/ (US Government Resource, Third Party Advisory, Mitigation)
www.treck.com (Product, Vendor Advisory)
jsof-tech.com/vulnerability-disclosure-policy/ (Third Party Advisory, Broken Link)
www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00295.html (Third Party Advisory)
www.kb.cert.org/vuls/id/257161 (US Government Resource, Third Party Advisory, third-party-advisory)
www.jsof-tech.com/ripple20/ (Exploit, Third Party Advisory, Broken Link)
tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-treck-ip… (vendor-advisory, Third Party Advisory)
www.arubanetworks.com/assets/alert/ARUBA-PSA-2020-006.txt (Third Party Advisory, Broken Link)
security.netapp.com/advisory/ntap-20200625-0006/ (Third Party Advisory)

Frequently asked questions

What is CVE-2020-11899?: CVE-2020-11899 is a medium-severity vulnerability in Dell Wyse 5030, classified under Out-of-bounds Read. CVSS score: 5.4/10. Published 2020-06-17.
How severe is CVE-2020-11899?: Medium severity. CVSS v3 base score is 5.4 out of 10.
Is CVE-2020-11899 known to be exploited?: Yes. CVE-2020-11899 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03), indicating it is being actively exploited. 8 public proof-of-concept repositories are indexed.