TI-2025-19050 Aliases CVE-2025-25566 GHSA-8hg9-rcgr-qwwm

Memory Leak vulnerability in SoftEtherVPN 5.02.5187 allows an attacker to cause a denial…

MEDIUM 58CWE-401Published 2025-03-12 · Updated 2025-07-19

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: Denial of service
Confidentiality · integrity · availability: Low · Low · Low
Fix status: No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-401.

Summary

Memory Leak vulnerability in SoftEtherVPN 5.02.5187 allows an attacker to cause a denial of service via the UnixMemoryAlloc function. NOTE: the Supplier disputes this because the behavior is limited to a single allocation of a few hundred bytes with a command-line tool.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00316 24th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:softether:vpn:5.02.5187:::::::*	5.02.5187	Vulnerable	SoftEther VPN

cpe:2.3:a:softether:vpn:5.02.5187:*:*:*:*:*:*:* Versions 5.02.5187 Vulnerable ·SoftEther VPN

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2025-25566
2026-10-03 Alias added: GHSA-8hg9-rcgr-qwwm

References

Exploit 1

https://lzydry.github.io/CVE-2025-25566/

Other 1

https://filecenter.softether-upload.com/d/250715_001_79538/CVE-2025-25566.pdf

TI-2025-19052 SoftEtherVPN 5.02.5187 is vulnerable to Use after Free in the Command.c file via the… CVSS 3.1CRITICAL 9.8
TI-2025-19051 SoftEther VPN 5.02.5187 is vulnerable to Buffer Overflow in Internat.c via the… CVSS 3.1CRITICAL 9.8
TI-2025-19049 SoftEther VPN 5.02.5187 is vulnerable to Buffer Overflow in the Command.c file via the… CVSS 3.1CRITICAL 9.8
TI-2023-15913 An authentication bypass vulnerability exists in the CiRpcServerThread() functionality of… CVSS 3.1HIGH 7.8
TI-2023-12241 An authentication bypass vulnerability exists in the CiRpcAccepted() functionality of… CVSS 3.1HIGH 7.8
TI-2023-08590 Infinite loop in SoftEther VPN CVSS 3.1MEDIUM 5.9

See all 12 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences