How severe is CVE-2020-11905?

CVE-2020-11905 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-11905 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-11905?

CVE-2020-11905 affects Treck Tcp/ip. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-11905?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-11905 published?

CVE-2020-11905 was published on 2020-06-17 and last updated on 2026-06-17.

CVE-2020-11905

CVE-2020-11905 is a medium-severity vulnerability in Treck Tcp/ip with a CVSS 3.x base score of 6.5. 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-125.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 3.3
EPSS exploit prediction: 2% (80th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-125
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 a DHCPv6 Out-of-bounds Read.

Frequently asked questions

What is CVE-2020-11905?: The Treck TCP/IP stack before 6.0.1.66 has a DHCPv6 Out-of-bounds Read.
How severe is CVE-2020-11905?: CVE-2020-11905 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over an adjacent network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-11905 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (80th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-11905?: CVE-2020-11905 affects Treck Tcp/ip. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-11905?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-11905 published?: CVE-2020-11905 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-125 (Out-of-bounds Read) vulnerabilities

CVE-2026-24826 — Critical (CVSS 10.0): Out-of-bounds Write, Divide By Zero, NULL Pointer Dereference, Use of Uninitialized Resource, Out-of-bounds Read,…
CVE-2024-22004 — Critical (CVSS 10.0): Due to length check, an attacker with privilege access on a Linux Nonsecure operating system can trigger a…
CVE-2021-41556 — Critical (CVSS 10.0): sqclass.cpp in Squirrel through 2.2.5 and 3.x through 3.1 allows an out-of-bounds read (in the core interpreter) that…
CVE-2021-21777 — Critical (CVSS 10.0): An information disclosure vulnerability exists in the Ethernet/IP UDP handler functionality of EIP Stack Group OpENer…
CVE-2017-14451 — Critical (CVSS 10.0): An exploitable out-of-bounds read vulnerability exists in libevm (Ethereum Virtual Machine) of CPP-Ethereum. A…
CVE-2013-0767 — Critical (CVSS 10.0): The nsSVGPathElement::GetPathLengthScale function in Mozilla Firefox before 18.0, Firefox ESR 10.x before 10.0.12 and…

Browse all CWE-125 (Out-of-bounds Read) vulnerabilities →