CVE-2023-22308

Name: CVE-2023-22308
Creator: NVD / NIST
Published: 2023-10-12T16:15:09.967+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2023-22308 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An integer underflow vulnerability exists in the vpnserver OvsProcessData functionality of SoftEther VPN 5.01.9674 and 5.02. A specially crafted network packet can lead to denial of service. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

Description

An integer underflow vulnerability exists in the vpnserver OvsProcessData functionality of SoftEther VPN 5.01.9674 and 5.02. A specially crafted network packet can lead to denial of service. An attacker can send a malicious packet to trigger this vulnerability.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

0.73%

49.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Softether	Vpn	5.01.9674
Softether	Vpn	5.02

References

https://talosintelligence.com/vulnerability_reports/TALOS-2023-1737Exploit, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2023-1737Exploit, Third Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2023-1737

Timeline

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

Frequently Asked Questions

What is CVE-2023-22308?

How severe is CVE-2023-22308?

CVE-2023-22308 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2023-22308?

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-2023-22308?

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

Scan your code now

Source: NVD / NIST