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

published 2020-06-17 6 y ago modified 2026-06-17 4 mo 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

Patch / fix

fixed in 1

treck tcp/ip 6.0.1.66

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 2024-09-19 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 2024-02-13 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, 2026-11-08).

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

jsof-tech.com /ripple20/
exploit, third-party-advisory
tools.cisco.com /security/center/content/CiscoSecurityAdvisory/cisco-sa-treck-ip-stack-JyBQ5GyC
vendor-advisory, third-party-advisory
treck.com
product, vendor-advisory
kb.cert.org /vuls/id/257161/
mitigation, third-party-advisory, us-government-resource
jsof-tech.com /vulnerability-disclosure-policy/
third-party-advisory
kb.cert.org /vuls/id/257161
third-party-advisory
arubanetworks.com /assets/alert/ARUBA-PSA-2020-006.txt
security.netapp.com /advisory/ntap-20200625-0006/
cert-portal.siemens.com /productcert/pdf/ssa-631949.pdf
support.hpe.com /hpesc/public/docDisplay?docLocale=en_US&docId=hpesbhf04012en_us
dell.com /support/article/de-de/sln321836/dell-response-to-the-ripple20-vulnerabilities

Sources

CVE List CVE-2020-11896
NVD CVE-2020-11896

Fencer Vulns 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.

Summary