CVE-2023-27395

Name: CVE-2023-27395
Creator: NVD / NIST
Published: 2023-10-12T16:15:11.583+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 1.42%

Last modified Jun 17, 2026

CVE-2023-27395 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. A heap-based buffer overflow vulnerability exists in the vpnserver WpcParsePacket() functionality of SoftEther VPN 4.41-9782-beta, 5.01.9674 and 5.02. A specially crafted network packet can lead to arbitrary code execution. EPSS estimates a 1.42% chance of exploitation in the next 30 days.

Description

A heap-based buffer overflow vulnerability exists in the vpnserver WpcParsePacket() functionality of SoftEther VPN 4.41-9782-beta, 5.01.9674 and 5.02. A specially crafted network packet can lead to arbitrary code execution. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.42%

69.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Softether	Vpn	4.41-9782	Beta
Softether	Vpn	5.01.9674	—
Softether	Vpn	5.02	—

References

https://talosintelligence.com/vulnerability_reports/TALOS-2023-1735Exploit, Third Party Advisory
https://www.softether.org/9-about/News/904-SEVPN202301Patch, Vendor Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2023-1735Exploit, Third Party Advisory
https://www.softether.org/9-about/News/904-SEVPN202301Patch, Vendor Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2023-1735

Timeline

Published: Oct 12, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-27395?

How severe is CVE-2023-27395?

CVE-2023-27395 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 1.42% probability of exploitation in the next 30 days.

How do I fix CVE-2023-27395?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-27395?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST