How severe is CVE-2023-25774?

CVE-2023-25774 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-25774 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-25774?

CVE-2023-25774 affects Softether Vpn. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-25774?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-25774 published?

CVE-2023-25774 was published on 2023-10-12 and last updated on 2026-06-17.

CVE-2023-25774

CVE-2023-25774 is a high-severity vulnerability in Softether Vpn with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-400.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-400
Affected product: Softether Vpn
Published: 2023-10-12
Last modified: 2026-06-17

Description

A denial-of-service vulnerability exists in the vpnserver ConnectionAccept() functionality of SoftEther VPN 5.02. A set of specially crafted network connections can lead to denial of service. An attacker can send a sequence of malicious packets to trigger this vulnerability.

Frequently asked questions

What is CVE-2023-25774?: A denial-of-service vulnerability exists in the vpnserver ConnectionAccept() functionality of SoftEther VPN 5.02. A set of specially crafted network connections can lead to denial of service. An attacker can send a sequence of malicious packets to trigger this vulnerability.
How severe is CVE-2023-25774?: CVE-2023-25774 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-25774 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-25774?: CVE-2023-25774 affects Softether Vpn. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-25774?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-25774 published?: CVE-2023-25774 was published on 2023-10-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:softether:vpn:5.02:*:*:*:*:*:*:*

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CVE-2023-23581 — High (CVSS 7.5): A denial-of-service vulnerability exists in the vpnserver EnSafeHttpHeaderValueStr functionality of SoftEther VPN…

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