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TI-2020-09575 Aliases CVE-2020-11909GHSA-m99q-jrwg-59cj

The Treck TCP/IP stack before 6.0.1.66 has an IPv4 Integer Underflow.

Priority MEDIUM 53CWE-191Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-191 and the CVSS impact.

Summary

The Treck TCP/IP stack before 6.0.1.66 has an IPv4 Integer Underflow.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.03591 89th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:treck:tcp\/ip:*:*:*:*:*:*:*:*before 6.0.1.66VulnerableTreck
  • cpe:2.3:a:treck:tcp\/ip:*:*:*:*:*:*:*:* Versions before 6.0.1.66 Vulnerable ·Treck

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-11909
  2. 2026-10-03 Alias added: GHSA-m99q-jrwg-59cj

References

Exploit 1

Advisory 5

Other 3

  • TI-2020-09565 The Treck TCP/IP stack before 6.0.1.66 has an IPv6 Out-of-bounds Read. KEVCVSS 3.1MEDIUM 5.4
  • TI-2020-09562 The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling. CVSS 3.1CRITICAL 10.0
  • TI-2020-09576 The Treck TCP/IP stack before 6.0.1.66 has an ICMPv4 Out-of-bounds Read. CVSS 3.1CRITICAL 9.8
  • TI-2020-09567 The Treck TCP/IP stack before 6.0.1.66 allows Remote Code execution via a single invalid DNS response. CVSS 3.1CRITICAL 9.0
  • TI-2020-09564 The Treck TCP/IP stack before 6.0.1.66 improperly handles an IPv4/ICMPv4 Length Parameter… CVSS 3.1CRITICAL 9.1
  • TI-2020-09563 The Treck TCP/IP stack before 5.0.1.35 has an Out-of-Bounds Write via multiple malformed IPv6 packets. CVSS 3.1CRITICAL 10.0
See all 20 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences