UpHeron
All vulnerabilities

Servers and applications

CVE-2017-7520

OpenVPN versions before 2.4.3 and before 2.3.17 are vulnerable to denial-of-service and/or possibly sensitive memory leak triggered by man-in-the-middle attacker.

Severity
High 7.4
Published
27 Jun 2017
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
3.4% in the next 30 daysHigher than 88% of CVEs. EPSS by FIRST, 11 Nov 2026
Weakness
Information exposure (CWE-200)Out-of-bounds read (CWE-125)
Attack
Over the network · Only under certain conditions · No login needed · No user action needed
Attacker can
Read data · Take it down
CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
Sources
NVD

Affected software

SoftwareAffected versions
OpenVPNServers and applications · cpe:a:openvpn:openvpn
  • Version 2.4.2
  • Version 2.4.1
  • Version 2.4.0
  • Version 2.4.0-rc2
All 9 release lines
  • Every version up to 2.3.16
  • Version 2.4.0-alpha2
  • Version 2.4.0-beta1
  • Version 2.4.0-beta2
  • Version 2.4.0-rc1
  • Version 2.4.0-rc2
  • Version 2.4.0
  • Version 2.4.1
  • Version 2.4.2

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2017-7520
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2017-7520