What is the CVSS score of CVE-2025-25566?

CVE-2025-25566 has a CVSS 3.1 base score of 5.6 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L. EPSS exploitation probability: 0.1%.

Which versions of Vpn are affected by CVE-2025-25566?

Organizations using Memory Leak vulnerability in SoftEtherVPN 5.02.5187 should be aware of moderate risk from CVE-2025-25566 rated CVSS 5.6.

Is there a public PoC exploit available for CVE-2025-25566?

Yes, a public proof-of-concept exploit is available for CVE-2025-25566. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2025-25566?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

Vpn CVE-2025-25566

MEDIUM

Memory Leak (CWE-401)

2025-03-12 cve@mitre.org

Denial Of Service Vpn

5.6

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

5.6 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 18:31 vuln.today

PoC Detected

Jul 19, 2025 - 02:15 vuln.today

Public exploit code

CVE Published

Mar 12, 2025 - 16:15 nvd

MEDIUM 5.6

DescriptionCVE.org

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.

AnalysisAI

Memory Leak vulnerability in SoftEtherVPN 5.02.5187 allows an attacker to cause a denial of service via the UnixMemoryAlloc function. Rated medium severity (CVSS 5.6), this vulnerability is remotely exploitable, no authentication required. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Memory Leak (CWE-401), which allows attackers to exhaust available memory leading to denial of service. 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. Affected products include: Softether Vpn.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Ensure all allocated memory is properly freed. Use RAII patterns or garbage-collected languages.

CVE-2025-25566 vulnerability details – vuln.today

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