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Fencer Intel
medium 6.5

CVE-2020-11903 json

The Treck TCP/IP stack before 6.0.1.28 has a DHCP Out-of-bounds Read.

published 6y ago modified 4mo ago also EUVD-2020-4240

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.1%
EPSS 2.1% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

The Treck TCP/IP stack before 6.0.1.28 has a DHCP Out-of-bounds Read.

Patch / fix

  • treck tcp/ip 6.0.1.28

Is CVE-2020-11903 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-20-168-01 updated cvss 5.3

Treck TCP/IP (Update I)

  • Treck Inc. Treck Inc TCP/IP IPv4, IPv6, UDP, DNS
    affected: mitigation “Treck recommends users apply the latest version of the affected products:” rockwellautomation.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

2.08% chance of exploitation in the next 30 days, higher than 81% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • jsof-tech.com https://www.jsof-tech.com/ripple20/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 2.0 3.3 AV:A/AC:L/Au:N/C:P/I:N/A:N

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.