CVE-2021-31606

HIGHNVD 7.57.5—

7.5

furlongm openvpn-monitor through 1.1.3 allows Authorization Bypass to disconnect arbitrary clients.

CVSS v3: 7.5
EG Score: 7.5(medium)
EPSS: 78.1%
KEV: Not listed

Published

September 27, 2021

Last Modified

November 21, 2024

References (6)

cve@mitrehttp://packetstormsecurity.com/files/164274/OpenVPN-Monitor-1.1.3-Authorization-Bypass-Denial-Of-Service.html
cve@mitrehttps://github.com/furlongm/openvpn-monitor/commit/ddb9d31ef0ec56f578bdacf99ebe9d68455ed8ca
cve@mitrehttps://github.com/furlongm/openvpn-monitor/releases
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/164274/OpenVPN-Monitor-1.1.3-Authorization-Bypass-Denial-Of-Service.html
af854a3a-2127-422b-91ae-364da2661108https://github.com/furlongm/openvpn-monitor/commit/ddb9d31ef0ec56f578bdacf99ebe9d68455ed8ca
af854a3a-2127-422b-91ae-364da2661108https://github.com/furlongm/openvpn-monitor/releases

Patch Availability(1)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
pip	openvpn-monitor	—	ghsa

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)

PyPI(1)

Package	Vulnerable range	Fixed in	Dependents
openvpn-monitor	1.0.0 ... 2.0.4 (6 versions)	—	—

Weakness Classification(1)

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

CWE-287Improper Authentication

Data Freshness Timeline

(refreshed 7× in last 7d / 7× 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.

2026-05-27 13:39 UTCepss_batch
2026-05-27 13:39 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 09:56 UTCEG score recompute
2026-05-26 09:56 UTCGHSA enrichment
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch

Frequently asked(5)

What is CVE-2021-31606?

CVE-2021-31606 is a high vulnerability published on September 27, 2021. furlongm openvpn-monitor through 1.1.3 allows Authorization Bypass to disconnect arbitrary clients.

When was CVE-2021-31606 disclosed?

CVE-2021-31606 was first published in the National Vulnerability Database on September 27, 2021, 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-2021-31606 actively exploited?

CVE-2021-31606 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 78.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2021-31606?

CVE-2021-31606 has a CVSS v3 base score of 7.5 (NVD).

How do I remediate CVE-2021-31606?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-31606, 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.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2021-31606

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