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Vulnerability record · CVE-2024-41138 · published 18 December 2024

CVE-2024-41138: Microsoft teams improper verification of cryptographic signature vulnerability

Microsoft · Teams

A library injection vulnerability exists in the com.microsoft.teams2.modulehost.app helper app of Microsoft Teams (work or school) 24046.2813.2770.1094 for macOS. A specially crafted library can leverage Teams's access privileges, leading to a permission bypass. A malicious application could inject a library and start the program to trigger this vulnerability and then make use of the vulnerable application's permissions.

9.8 CVSS 3.1 Critical EPSS 0.91% · top 41.7% CWE-347 · Improper verification of cryptographic signature
9.8CVSS 3.1 base score
0.91%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A library injection vulnerability exists in the com.microsoft.teams2.modulehost.app helper app of Microsoft Teams (work or school) 24046.2813.2770.1094 for macOS. A specially crafted library can leverage Teams's access privileges, leading to a permission bypass. A malicious application could inject a library and start the program to trigger this vulnerability and then make use of the vulnerable application's permissions.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://talosintelligence.com/vulnerability_reports/TALOS-2024-1991 ExploitThird Party Advisory
https://www.talosintelligence.com/vulnerability_reports/TALOS-2024-1991 ExploitThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2023-4863libwebp Heap Buffer Overflow via Crafted WebP ImageA heap buffer overflow in libwebp allows an out-of-bounds memory write when processing a crafted WebP image. It affects Google Chrome before 116.0.58…KEVEPSS 100%analysed10.0CVE-2026-65667Microsoft teams missing authorization vulnerabilityMissing authorization in Microsoft Teams allows an unauthorized attacker to elevate privileges over a network.EPSS 0.80%9.8CVE-2026-65768Microsoft teams path traversal vulnerabilityImproper limitation of a pathname to a restricted directory ('path traversal') in Microsoft Teams for Android allows an unauthorized attacker to exec…EPSS 0.94%9.8CVE-2024-42004Microsoft teams improper verification of cryptographic signature vulnerabilityA library injection vulnerability exists in Microsoft Teams (work or school) 24046.2813.2770.1094 for macOS. A specially crafted library can leverage…EPSS 0.81%9.8CVE-2024-41145Microsoft teams improper verification of cryptographic signature vulnerabilityA library injection vulnerability exists in the WebView.app helper app of Microsoft Teams (work or school) 24046.2813.2770.1094 for macOS. A speciall…EPSS 0.80%9.6CVE-2026-62896Microsoft teams improper authentication vulnerabilityImproper authentication in Microsoft Teams allows an authorized attacker to elevate privileges over a network.EPSS 0.69%8.8CVE-2023-29328Microsoft teams use after free vulnerabilityMicrosoft Teams Remote Code Execution VulnerabilityEPSS 2.2%8.8CVE-2023-29330Microsoft teams use after free vulnerabilityMicrosoft Teams Remote Code Execution VulnerabilityEPSS 2.0%

Source: NIST National Vulnerability Database (record CVE-2024-41138), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.