CVE-2019-25466Public exploit

Local code execution via username SEH overwrite

Published Mar 11, 2026 · Updated Mar 11, 2026

Stack buffer overflow in EFS Software, Inc. Easy File Sharing Web Server 7.2 allows local users to execute code through a crafted username. The payload overwrites the next-SEH and SEH records at offset 4,059, then redirects control through a non-SafeSEH gadget in ImageLoad.dll. Exploitation requires local access to the user-account interface; the published exploit is specific to the Windows build.

CVSS severity8.6
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack buffer overflow in EFS Software, Inc. Easy File Sharing Web Server 7.2 allows local users to execute code through a crafted username. The payload overwrites the next-SEH and SEH records at offset 4,059, then redirects control through a non-SafeSEH gadget in ImageLoad.dll. Exploitation requires local access to the user-account interface; the published exploit is specific to the Windows build.

The record

CVE
CVE-2019-25466
Published
Mar 11, 2026
Updated
Mar 11, 2026
Vendor
EFS Software, Inc.
Product
Easy File Sharing Web Server
Classifications
CWE-787, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 11, 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=7.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

EFS Software, Inc. · Easy File Sharing Web Serverversion=7.2

Published CVSS scores

8.6VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
8.4VulnCheckCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/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)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1203Exploitation for Client Execution

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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