# CVE-2023-27516

## Summary

- **CVE ID:** CVE-2023-27516
- **Severity:** HIGH
- **CVSS Score:** 7.3 (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L)
- **CWE:** CWE-453
- **Published:** Oct 12, 2023
- **Last Modified:** Mar 13, 2026

## Description

An authentication bypass vulnerability exists in the CiRpcAccepted() functionality of SoftEther VPN 4.41-9782-beta and 5.01.9674. A specially crafted network packet can lead to unauthorized access. An attacker can send a network request to trigger this vulnerability.

## Affected Products

- SoftEther VPN — SoftEther VPN (4.41-9782-beta)
- SoftEther VPN — SoftEther VPN (5.01.9674)

## References

- [CNA](https://talosintelligence.com/vulnerability_reports/TALOS-2023-1754)
- [CNA](https://www.softether.org/9-about/News/904-SEVPN202301)
- [CVE](https://www.talosintelligence.com/vulnerability_reports/TALOS-2023-1754)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.05%
- **EPSS Percentile:** 15.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._