CVE-2020-11909
The Treck TCP/IP stack before 6.0.1.66 has an IPv4 Integer Underflow.
The Treck TCP/IP stack before 6.0.1.66 has an IPv4 Integer Underflow.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
The Treck TCP/IP stack before 6.0.1.66 has an IPv4 Integer Underflow.
- Record
CVE-2020-11909- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-191
- Updated
- 2026-11-02
CVE List
The Treck TCP/IP stack before 6.0.1.66 has an IPv4 Integer Underflow.
- Record
CVE-2020-11909- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Weakness
- CWE-191
- Updated
- 2026-11-02
EUVDEUVD-2020-4246
The Treck TCP/IP stack before 6.0.1.66 has an IPv4 Integer Underflow.
- Record
EUVD-2020-4246- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-m99q-jrwg-59cj
The Treck TCP/IP stack before 6.0.1.66 has an IPv4 Integer Underflow.
The Treck TCP/IP stack before 6.0.1.66 has an IPv4 Integer Underflow.
- Record
GHSA-m99q-jrwg-59cj- CVSS 3.1
- 5.3 Medium
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - Weakness
- CWE-191
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-11909 is a medium vulnerability (CVSS 5.3) in Treck Tcp\/ip, published June 17, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.59%, the 89th percentile. No source names a fixed version.