CVE-2024-28519

Local privilege escalation via kernel handle leak

Published May 3, 2024 · Updated Mar 13, 2025

Local privilege escalation in MicroWorld eScan Anti-Virus 4.0.0.49 allows local users to gain elevated access via a kernel handle leak. ProcObsrvesx.sys exposes its driver device to every local user and leaks a kernel handle that can be repurposed from an existing process handle. Low-privileged local access is required, and successful abuse raises privileges on the Windows host.

CVSS severity7.8
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Local privilege escalation in MicroWorld eScan Anti-Virus 4.0.0.49 allows local users to gain elevated access via a kernel handle leak. ProcObsrvesx.sys exposes its driver device to every local user and leaks a kernel handle that can be repurposed from an existing process handle. Low-privileged local access is required, and successful abuse raises privileges on the Windows host.

The record

CVE
CVE-2024-28519
Published
May 3, 2024
Updated
Mar 13, 2025
Vendor
MicroWorld Technologies Inc.
Product
eScan Anti-Virus
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 3, 2024CVE publishedPublication date reported by the CVE source.
  2. Mar 13, 2025Record 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=4.0.0.49

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

MicroWorld Technologies Inc. · eScan Anti-Virusversion=4.0.0.49

Published CVSS scores

7.3Northwave Cyber SecurityCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

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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