How severe is CVE-2020-26133?

CVE-2020-26133 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-26133 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-26133?

CVE-2020-26133 affects Dual Dhcp Dns Server Project Dual Dhcp Dns Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-26133?

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-2020-26133 published?

CVE-2020-26133 was published on 2020-10-28 and last updated on 2026-06-17.

CVE-2020-26133

CVE-2020-26133 is a high-severity vulnerability in Dual Dhcp Dns Server Project Dual Dhcp Dns Server with a CVSS 3.x base score of 7.8. 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-732.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Dual Dhcp Dns Server Project Dual Dhcp Dns Server
Published: 2020-10-28
Last modified: 2026-06-17

Description

An issue was discovered in Dual DHCP DNS Server 7.40. Due to insufficient access restrictions in the default installation directory, an attacker can elevate privileges by replacing the DualServer.exe binary.

Frequently asked questions

What is CVE-2020-26133?: An issue was discovered in Dual DHCP DNS Server 7.40. Due to insufficient access restrictions in the default installation directory, an attacker can elevate privileges by replacing the DualServer.exe binary.
How severe is CVE-2020-26133?: CVE-2020-26133 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-26133 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-26133?: CVE-2020-26133 affects Dual Dhcp Dns Server Project Dual Dhcp Dns Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-26133?: 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-2020-26133 published?: CVE-2020-26133 was published on 2020-10-28 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:dual_dhcp_dns_server_project:dual_dhcp_dns_server:7.40:*:*:*:*:*:*:*

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