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Fencer Intel
critical 10.0

CVE-2020-11896 in the critical feed json

The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.

published 6y ago modified 4mo ago also EUVD-2020-4233

cvss
10.0
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
36.9%
EPSS 36.9% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.

Patch / fix

  • treck tcp/ip 6.0.1.66

Is CVE-2020-11896 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 10.0

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

cisa ICSA-24-046-03 updated cvss 7.5

Siemens SIMATIC RTLS Gateways

  • Siemens SIMATIC RTLS Gateway RTLS4030G, CMIIT (6GT2701-5DB23) Siemens SIMATIC RTLS Gateway RTLS4030G, ETSI (6GT2701-5DB03) Siemens SIMATIC RTLS Gateway RTLS4030G, FCC (6GT2701-5DB13) Siemens SIMATIC RTLS Gateway RTLS4030G, ISED (6GT2701-5DB33) Siemens SIMATIC RTLS Gateway RTLS4430G, Chirp, ETSI, FCC, ISED, IP65 (6GT2701-5CB03)
    affected: workaround, no fix planned

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

36.85% chance of exploitation in the next 30 days, higher than 98% 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 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD 2.0 9.3 AV:N/AC:M/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-787 Out-of-bounds Write

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.