MicroWorld eScan AV 2023-07-31 Update certificate validation ⚔ [Disputed]

Summaryinfo

A vulnerability was found in MicroWorld eScan AV 2023-07-31. It has been classified as critical. This affects an unknown part of the component Update Handler. The manipulation leads to certificate validation. This vulnerability is referenced as CVE-2024-13990. Remote exploitation of the attack is possible. No exploit is available. There is ongoing doubt regarding the real existence of this vulnerability.

Detailsinfo

A vulnerability was found in MicroWorld eScan AV 2023-07-31 and classified as problematic. This issue affects an unknown code block of the component Update Handler. The manipulation with an unknown input leads to a certificate validation vulnerability. Using CWE to declare the problem leads to CWE-295. The product does not validate, or incorrectly validates, a certificate. Impacted is integrity. The summary by CVE is:

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.

The advisory is shared at blog.avast.com. The identification of this vulnerability is CVE-2024-13990 since 09/18/2025. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1587.003 for this issue.

The real existence of this vulnerability is still doubted at the moment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-30273). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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Vendor

• MicroWorld

Name

• eScan AV

Version

• 2023-07-31

CPE 2.3info

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CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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