How severe is CVE-2024-27903?

CVE-2024-27903 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2024-27903 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-27903?

CVE-2024-27903 affects Openvpn. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-27903?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2024-27903 have an EU (EUVD) identifier?

Yes. CVE-2024-27903 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-25095.

When was CVE-2024-27903 published?

CVE-2024-27903 was published on 2024-07-08 and last updated on 2026-06-17.

CVE-2024-27903

CVE-2024-27903 is a critical-severity vulnerability in Openvpn with a CVSS 3.x base score of 9.8. 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-25095
Weakness: CWE-434
Affected product: Openvpn
Published: 2024-07-08
Last modified: 2026-06-17

Description

OpenVPN plug-ins on Windows with OpenVPN 2.6.9 and earlier could be loaded from any directory, which allows an attacker to load an arbitrary plug-in which can be used to interact with the privileged OpenVPN interactive service.

Frequently asked questions

What is CVE-2024-27903?: OpenVPN plug-ins on Windows with OpenVPN 2.6.9 and earlier could be loaded from any directory, which allows an attacker to load an arbitrary plug-in which can be used to interact with the privileged OpenVPN interactive service.
How severe is CVE-2024-27903?: CVE-2024-27903 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2024-27903 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-27903?: CVE-2024-27903 affects Openvpn. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-27903?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2024-27903 have an EU (EUVD) identifier?: Yes. CVE-2024-27903 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-25095.
When was CVE-2024-27903 published?: CVE-2024-27903 was published on 2024-07-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openvpn:openvpn:*:*:*:*:community:*:*:*

More vulnerabilities in Openvpn

CVE-2023-46850 — Critical (CVSS 9.8): Use after free in OpenVPN version 2.6.0 to 2.6.6 may lead to undefined behavoir, leaking memory buffers or remote…
CVE-2022-0547 — Critical (CVSS 9.8): OpenVPN 2.1 until v2.4.12 and v2.5.6 may enable authentication bypass in external authentication plug-ins when more…
CVE-2017-12166 — Critical (CVSS 9.8): OpenVPN versions before 2.3.3 and 2.4.x before 2.4.4 are vulnerable to a buffer overflow vulnerability when key-method…
CVE-2025-12106 — Critical (CVSS 9.1): Insufficient argument validation in OpenVPN 2.7_alpha1 through 2.7_rc1 allows an attacker to trigger a heap buffer…
CVE-2024-5594 — Critical (CVSS 9.1): OpenVPN before 2.6.11 does not santize PUSH_REPLY messages properly which an attacker controlling the server can use to…
CVE-2018-7544 — Critical (CVSS 9.1): A cross-protocol scripting issue was discovered in the management interface in OpenVPN through 2.4.5. When this…

All CVEs affecting Openvpn →

Other CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities

CVE-2026-48283 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-48276 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Unrestricted Upload of File with Dangerous Type…
CVE-2026-57700 — Critical (CVSS 10.0): Unrestricted Upload of File with Dangerous Type vulnerability in Daan.Dev OMGF Pro allows Using Malicious Files. This…
CVE-2025-69129 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in WordPress & WooCommerce Scraper Plugin, Import Data from Any Site <= 1.0.7…
CVE-2026-40772 — Critical (CVSS 10.0): Unauthenticated Arbitrary File Upload in GeekyBot <= 1.2.2 versions.
CVE-2026-40412 — Critical (CVSS 10.0): Unrestricted upload of file with dangerous type in Azure Orbital Spatio allows an unauthorized attacker to execute code…

Browse all CWE-434 (Unrestricted Upload of File with Dangerous Type) vulnerabilities →