CVE-2024-13990 json
MicroWorld eScan AV Insecure Update Mechanism Allows Man-in-the-Middle Replacement of Updates
published 2025-09-19 13 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-30273
- cvss
- 9.3
- version 4.0, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 49%
- public exploits
- 0
- none known
Summary
MicroWorld eScan AV's update mechanism failed to ensure authenticity and integrity of updates: update packages were delivered and accepted without robust cryptographic verification. As a result, an on-path attacker could perform a man-in-the-middle (MitM) attack and substitute malicious update payloads for legitimate ones. The eScan AV client accepted these substituted packages and executed or loaded their components (including sideloaded DLLs and Java/installer payloads), enabling remote code execution on affected systems. MicroWorld eScan confirmed remediation of the update mechanism on 2023-07-31 but versioning details are unavailable. NOTE: MicroWorld eScan disputes the characterization in third-party reports, stating the issue relates to 2018–2019 and that controls were implemented then.
Patch / fix
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 13 mo ago
Exploit prediction
0.62% chance of exploitation in the next 30 days, higher than 49% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- gendigital.com https://www.gendigital.com/blog/insights/research/guptiminer-hijacking-antivirus-updates-for-distributing-backdoors-and-casual-mining referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 4.0 | 9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- MicroWorld Technologies eScan AV
Classification
References
-
escanav.com
/en/about-us/eScan-update-advisory.asp
vendor-advisory, patch
-
gendigital.com
/blog/insights/research/guptiminer-hijacking-antivirus-updates-for-distributing-backdoors-and-casual-mining
technical-description, exploit
-
blog.avast.com
/leading-the-charge-against-guptiminer
technical-description
-
securityaffairs.com
/162228/breaking-news/escan-antivirus-mitm-attack.html
media-coverage
-
arstechnica.com
/security/2024/04/hackers-infect-users-of-antivirus-service-that-delivered-updates-over-http/
technical-description
-
bleepingcomputer.com
/news/security/hackers-hijack-antivirus-updates-to-drop-guptiminer-malware/
media-coverage
-
thehackernews.com
/2024/04/escan-antivirus-update-mechanism.html
media-coverage
-
vulncheck.com
/advisories/microworld-escan-av-insecure-update-mechanism-allows-mitm-replacement-of-updates
third-party-advisory
Sources
- CVE List CVE-2024-13990
- NVD CVE-2024-13990
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