CVE-2020-7533

CRITICALNVD 9.89.8—

9.8

CWE-287: Improper Authentication vulnerability exists which could cause the execution of commands on the webserver without authentication when sending specially crafted HTTP requests.

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 46.4%
KEV: Not listed

Published

December 1, 2020

Last Modified

June 10, 2025

References (2)

cybersecurity@sehttps://download.schneider-electric.com/files?p_File_Name=SEVD-2020-287-01_Modicon_Web_Server_Security_Notificatiton.pdf&p_Doc_Ref=SEVD-2020-287-01&p_enDocType=Security+and+Safety+Notice
af854a3a-2127-422b-91ae-364da2661108https://www.se.com/ww/en/download/document/SEVD-2020-287-01/

Weakness Classification(1)

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

CWE-287Improper Authentication

Data Freshness Timeline

(refreshed 13× in last 7d / 20× 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.

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Frequently asked(5)

What is CVE-2020-7533?

CVE-2020-7533 is a critical vulnerability published on December 1, 2020. CWE-287: Improper Authentication vulnerability exists which could cause the execution of commands on the webserver without authentication when sending specially crafted HTTP requests.

When was CVE-2020-7533 disclosed?

CVE-2020-7533 was first published in the National Vulnerability Database on December 1, 2020, with the most recent update on June 10, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2020-7533 actively exploited?

CVE-2020-7533 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 46.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2020-7533?

CVE-2020-7533 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2020-7533?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2020-7533, 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-2020-7533

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2020-7533?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)