CVE-2020-26133

HIGHNVD 7.87.8—

7.8

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.

CVSS v3: 7.8
EG Score: 7.8(medium)
EPSS: 14.3%
KEV: Not listed

Published

October 28, 2020

Last Modified

November 21, 2024

References (6)

cve@mitrehttps://github.com/OffensiveOceloot/advisories/blob/main/CVE-2020-26133.md
cve@mitrehttps://github.com/an0ry/advisories
cve@mitrehttps://sourceforge.net/projects/dhcp-dns-server/
af854a3a-2127-422b-91ae-364da2661108https://github.com/OffensiveOceloot/advisories/blob/main/CVE-2020-26133.md
af854a3a-2127-422b-91ae-364da2661108https://github.com/an0ry/advisories
af854a3a-2127-422b-91ae-364da2661108https://sourceforge.net/projects/dhcp-dns-server/

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 19× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-31 00:15 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-24 16:48 UTCepss_batch
2026-05-23 05:53 UTCEG score recompute
2026-05-23 05:53 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2020-26133?

CVE-2020-26133 is a high vulnerability published on October 28, 2020. 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.

When was CVE-2020-26133 disclosed?

CVE-2020-26133 was first published in the National Vulnerability Database on October 28, 2020, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-26133 actively exploited?

CVE-2020-26133 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 14.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-26133?

CVE-2020-26133 has a CVSS v3 base score of 7.8 (NVD).

How do I remediate CVE-2020-26133?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-26133, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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CVE-2020-26133

📅 Published

🔄 Last Modified

🔗 References (6)

Weakness Classification(2)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-26133?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (6)

Frequently asked(5)

Related CVEs(same CWE)