CVE-2024-13990Known exploitationNetwork attack vector

Code execution via unverified update package replacement

Published Sep 19, 2025 · Updated Nov 19, 2025

Improper update verification in MicroWorld eScan Anti-Virus allows man-in-the-middle attackers to execute code through substituted packages. The updater fetched packages over unencrypted HTTP, unpacked them without robust authenticity checks, and loaded a substituted version.dll with eScan privileges. Exploitation requires control of the update path; observed attacks installed backdoors and miners, while MicroWorld states that controls deployed in 2019 removed the flaw.

CVSS severity9.3
Critical
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationReported
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper update verification in MicroWorld eScan Anti-Virus allows man-in-the-middle attackers to execute code through substituted packages. The updater fetched packages over unencrypted HTTP, unpacked them without robust authenticity checks, and loaded a substituted version.dll with eScan privileges. Exploitation requires control of the update path; observed attacks installed backdoors and miners, while MicroWorld states that controls deployed in 2019 removed the flaw.

The record

CVE
CVE-2024-13990
Published
Sep 19, 2025
Updated
Nov 19, 2025
Vendor
MicroWorld Technologies Inc.
Product
eScan Anti-Virus
Classifications
CWE-295, CWE-347, T1195.002, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 1, 2018Exploitation reportedGuptiMiner eScan update-hijacking campaign
  2. Sep 19, 2025CVE publishedPublication date reported by the CVE source.
  3. Nov 19, 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=*

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

MicroWorld Technologies Inc. · eScan Anti-Virusversion=*

Published CVSS scores

9.3VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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)
Vectornetwork
Privilegesunauthenticated
Known exploitationReported
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
CWE-347Improper Verification of Cryptographic Signature
T1195.002Compromise Software Supply Chain
T1557Adversary-in-the-Middle

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.

Reported exploitation

Technologies

Your stack

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Your stack

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