Home/CVE/The interactive service in OpenVPN 2.6.9 and earlier allows an attacker to send data causing a stack overflow which can
CVE

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

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.

HIGH · CVSS 7.8 EPSS 0.05418
Schedule remediation
  • EPSS percentile: top 10% of all CVEs by exploitation likelihood
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-121Stack-based Buffer Overflow
CWE-787Out-of-bounds Write
▤

Affected Products & Versions

2
openvpn< 2.5.10
openvpn>= 2.6.0 and < 2.6.10
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · security@openvpn.net
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD08 Jul 2024 · 11:15 AM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

2
siemens-csafSSA-615740
cisa-csafcisa-csaf-csaf_files-OT-white-2025-icsa-25-072-10
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://community.openvpn.net/openvpn/wiki/CVE-2024-27459Vendor Advisory
https://openvpn.net/security-advisory/ovpnx-vulnerability-cve-2024-27903-cve-2024-27459-cve-2024-24974/Vendor Advisory
https://www.mail-archive.com/openvpn-users@lists.sourceforge.net/msg07534.htmlMailing List
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