CVE-2026-62918 HIGH

CVE-2026-62918: Microsoft Teams Spoofing Vulnerability

Vendor Microsoft

Product Microsoft Teams

Weakness CWE-347

Published August 6, 2026

Last update August 14, 2026

View on NVD All CVEs

CVSS base score

7.5/10

Attack vector Network

Attack complexity Low

Privileges required None

User interaction None

Confidentiality None

Integrity High

CVSS vector

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

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

August 6, 2026 CVE published

August 14, 2026 Record updated

External resources

03References

NVD — National Vulnerability Database https://nvd.nist.gov/vuln/detail/CVE-2026-62918 CWE — Common Weakness Enumeration https://cwe.mitre.org/data/definitions/347.html AskarLabs — CWE-347 write-up Improper Verification of Cryptographic Signature

Related vulnerabilities

04Related CVE

CVE-2026-10795 UpdraftPlus: WP Backup & Migration Plugin <= 1.26.4 - Unauthenticated Authentication Bypass via UpdraftCentral udrpc CVE-2026-0750 Payment bypass in Commerce Paybox CVE-2026-15013 SAML Single Sign On <= 5.4.3 - Unauthenticated Authentication Bypass via 'SAMLResponse' Parameter Signature Algorithm Confusion CVE-2026-5050 Payment Gateway for Redsys & WooCommerce Lite <= 7.0.0 - Improper Verification of Cryptographic Signature to Unauthenticated Payment Status Manipulation CVE-2025-9485 OAuth Single Sign On – SSO (OAuth Client) <= 6.26.12 - Authentication Bypass via get_resource_owner_from_id_token()