How severe is CVE-2020-11904?

CVE-2020-11904 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2020-11904 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-11904?

CVE-2020-11904 affects Treck Tcp/ip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-11904?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-11904 published?

CVE-2020-11904 was published on 2020-06-17 and last updated on 2026-06-17.

CVE-2020-11904

CVE-2020-11904 is a high-severity vulnerability in Treck Tcp/ip with a CVSS 3.x base score of 7.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 7.5
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-190
Affected product: Treck Tcp/ip
Published: 2020-06-17
Last modified: 2026-06-17

Description

The Treck TCP/IP stack before 6.0.1.66 has an Integer Overflow during Memory Allocation that causes an Out-of-Bounds Write.

Frequently asked questions

What is CVE-2020-11904?: The Treck TCP/IP stack before 6.0.1.66 has an Integer Overflow during Memory Allocation that causes an Out-of-Bounds Write.
How severe is CVE-2020-11904?: CVE-2020-11904 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2020-11904 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-11904?: CVE-2020-11904 affects Treck Tcp/ip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-11904?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-11904 published?: CVE-2020-11904 was published on 2020-06-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:treck:tcp\/ip:*:*:*:*:*:*:*:*

More vulnerabilities in Treck Tcp/ip

CVE-2020-25066 — Critical (CVSS 10.0): A heap-based buffer overflow in the Treck HTTP Server component before 6.0.1.68 allows remote attackers to cause a…
CVE-2020-11897 — Critical (CVSS 10.0): The Treck TCP/IP stack before 5.0.1.35 has an Out-of-Bounds Write via multiple malformed IPv6 packets.
CVE-2020-11896 — Critical (CVSS 10.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code Execution, related to IPv4 tunneling.
CVE-2020-11898 — Critical (CVSS 9.1): The Treck TCP/IP stack before 6.0.1.66 improperly handles an IPv4/ICMPv4 Length Parameter Inconsistency, which might…
CVE-2020-11901 — Critical (CVSS 9.0): The Treck TCP/IP stack before 6.0.1.66 allows Remote Code execution via a single invalid DNS response.
CVE-2020-11900 — High (CVSS 8.2): The Treck TCP/IP stack before 6.0.1.41 has an IPv4 tunneling Double Free.

All CVEs affecting Treck Tcp/ip →

Other CWE-190 (Integer Overflow or Wraparound) vulnerabilities

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CVE-2025-64721 — Critical (CVSS 10.0): Sandboxie is a sandbox-based isolation software for 32-bit and 64-bit Windows NT-based operating systems. In versions…
CVE-2015-5108 — Critical (CVSS 10.0): Integer overflow in Adobe Reader and Acrobat 10.x before 10.1.15 and 11.x before 11.0.12, Acrobat and Acrobat Reader DC…
CVE-2015-5097 — Critical (CVSS 10.0): Integer overflow in Adobe Reader and Acrobat 10.x before 10.1.15 and 11.x before 11.0.12, Acrobat and Acrobat Reader DC…
CVE-2013-2555 — Critical (CVSS 10.0): Integer overflow in Adobe Flash Player before 10.3.183.75 and 11.x before 11.7.700.169 on Windows and Mac OS X, before…

Browse all CWE-190 (Integer Overflow or Wraparound) vulnerabilities →