CVE-2026-8359Public exploitNetwork attack vector

Unauthenticated service crash via NULL function pointer

Published May 27, 2026 · Updated May 27, 2026

NULL pointer dereference in Gladinet Triofox before 17.3.10565.57509 allows remote attackers to crash the Server Agent service. The /status and /sysinfo handlers in WOSMiniWebServer.dll try to load absent WOSHttpStatusModule.dll, retain a NULL WOSBin_LoadHttpModule pointer, and invoke address zero. No authentication or user interaction is required; one crafted HTTP request interrupts the Windows Server Agent service.

CVSS severity7.5
High
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in Gladinet Triofox before 17.3.10565.57509 allows remote attackers to crash the Server Agent service. The /status and /sysinfo handlers in WOSMiniWebServer.dll try to load absent WOSHttpStatusModule.dll, retain a NULL WOSBin_LoadHttpModule pointer, and invoke address zero. No authentication or user interaction is required; one crafted HTTP request interrupts the Windows Server Agent service.

The record

CVE
CVE-2026-8359
Published
May 27, 2026
Updated
May 27, 2026
Vendor
Gladinet
Product
Triofox
Classifications
CWE-476, CAPEC-129, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <17.3.10565.57509

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Gladinet · Triofoxversion=0 <17.3.10565.57509

Published CVSS scores

7.5Tenable Network Security, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
CAPEC-129Pointer Manipulation
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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