CVE-2025-15387

HIGHNVD 8.88.8—

8.8

VPN Firewall developed by QNO Technology has a Insufficient Entropy vulnerability, allowing unauthenticated remote attackers to obtain any logged-in user session through brute-force attacks and subsequently log into the system.

CVSS v3: 8.8
EG Score: 8.8(medium)
EPSS: 26.3%
KEV: Not listed

Published

December 31, 2025

Last Modified

April 15, 2026

Advisory Details (1)

Auto-updated May 21, 2026

No patch confirmed yet. Sources: cert.

cert

QNO Technology｜VPN Firewall - 3 Vulnerabilities-TWCERT/CC Taiwan Computer Emergency Response Team/Coordination Center

https://www.twcert.org.tw/en/cp-139-10614-dee41-2.html

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-331Insufficient Entropy

Data Freshness Timeline

(refreshed 13× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:12 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
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2026-05-31 00:16 UTCepss_batch
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2026-05-29 13:44 UTCepss_batch
2026-05-28 13:44 UTCepss_batch
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2026-05-27 13:40 UTCepss_batch
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2026-05-26 13:43 UTCepss_batch
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2026-05-26 13:43 UTCepss_batch

Frequently asked(5)

What is CVE-2025-15387?

CVE-2025-15387 is a high vulnerability published on December 31, 2025. VPN Firewall developed by QNO Technology has a Insufficient Entropy vulnerability, allowing unauthenticated remote attackers to obtain any logged-in user session through brute-force attacks and subsequently log into the system.

When was CVE-2025-15387 disclosed?

CVE-2025-15387 was first published in the National Vulnerability Database on December 31, 2025, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-15387 actively exploited?

CVE-2025-15387 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 26.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-15387?

CVE-2025-15387 has a CVSS v3 base score of 8.8 (NVD).

How do I remediate CVE-2025-15387?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-15387, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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