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Vulnerability record · CVE-2026-62918 · published 7 August 2026

CVE-2026-62918: Microsoft teams improper verification of cryptographic signature vulnerability

Microsoft · Teams

Improper verification of cryptographic signature in Microsoft Teams allows an unauthorized attacker to perform spoofing over a network.

7.5 CVSS 3.1 High EPSS 0.50% · top 60.0% CWE-347 · Improper verification of cryptographic signature
7.5CVSS 3.1 base score
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
7 Aug 2026Last modified by NVD

Description

Improper verification of cryptographic signature in Microsoft Teams allows an unauthorized attacker to perform spoofing over a network.

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

Affected products

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

References

LinkTags
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62918 Vendor 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-2024-41138Microsoft teams improper verification of cryptographic signature vulnerabilityA library injection vulnerability exists in the com.microsoft.teams2.modulehost.app helper app of Microsoft Teams (work or school) 24046.2813.2770.10…EPSS 0.91%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%

Source: NIST National Vulnerability Database (record CVE-2026-62918), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.