What is CVE-2024-27459?

CVE-2024-27459 is a high-severity vulnerability in Openvpn, classified under Stack-based Buffer Overflow. CVSS score: 7.8/10. Published 2024-07-08.

How severe is CVE-2024-27459?

High severity. CVSS v3 base score is 7.8 out of 10.

Buffer overflow in Openvpn

CVE-2024-27459

The interactive service in OpenVPN 2.6.9 and earlier allows an attacker to send data causing a stack overflow which can be used to execute arbitrary code with more privileges.

Vulnerability class: Buffer Overflow

Published 2024-07-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.083 (94.7th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.083 · newest: 0.083 · change: 0.000

Affected products

Openvpn
Openvpn Gui — versions 2.6.9 and earlier

Weakness classification (CWE)

References

community.openvpn.net/openvpn/wiki/CVE-2024-27459 (Vendor Advisory)
openvpn.net/security-advisory/ovpnx-vulnerability-cve-2024-27903-cve-2024-27459… (Vendor Advisory)
www.mail-archive.com/openvpn-users@lists.sourceforge.net/msg07534.html (Mailing List)

Frequently asked questions

What is CVE-2024-27459?: CVE-2024-27459 is a high-severity vulnerability in Openvpn, classified under Stack-based Buffer Overflow. CVSS score: 7.8/10. Published 2024-07-08.
How severe is CVE-2024-27459?: High severity. CVSS v3 base score is 7.8 out of 10.