CVE-2026-62918: CWE-347: Improper Verification of Cryptographic Signature in Microsoft Microsoft Teams
Improper verification of cryptographic signature in Microsoft Teams allows an unauthorized attacker to perform spoofing over a network.
AI Analysis
Technical Summary
This vulnerability, identified as CWE-347, concerns improper verification of cryptographic signatures in Microsoft Teams. An attacker exploiting this flaw could spoof identities or messages on the network, potentially misleading users or systems. The CVSS 3.1 base score is 7.5, reflecting high severity with network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to integrity. Microsoft has released an official fix for this issue.
Potential Impact
An attacker can spoof communications within Microsoft Teams by exploiting the improper signature verification, potentially leading to misinformation or unauthorized actions. Confidentiality and availability are not impacted, but integrity is compromised.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users and administrators should apply the provided patch promptly to remediate the issue.
CVE-2026-62918: CWE-347: Improper Verification of Cryptographic Signature in Microsoft Microsoft Teams
Description
Improper verification of cryptographic signature in Microsoft Teams allows an unauthorized attacker to perform spoofing over a network.
CVSS v3.1
Score 7.5high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-347, concerns improper verification of cryptographic signatures in Microsoft Teams. An attacker exploiting this flaw could spoof identities or messages on the network, potentially misleading users or systems. The CVSS 3.1 base score is 7.5, reflecting high severity with network attack vector, low attack complexity, no privileges or user interaction required, and impact limited to integrity. Microsoft has released an official fix for this issue.
Potential Impact
An attacker can spoof communications within Microsoft Teams by exploiting the improper signature verification, potentially leading to misinformation or unauthorized actions. Confidentiality and availability are not impacted, but integrity is compromised.
Mitigation Recommendations
An official fix is available from Microsoft for this vulnerability. Users and administrators should apply the provided patch promptly to remediate the issue.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-p2wf-cwq4-f5gj
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-62918"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
- Remediation Level
- official-fix
- State
- PUBLISHED
Threat ID: 6a75739abf8831d539d91af5
Added to database: 08/07/2026, 05:56:42 UTC
Last enriched: 08/15/2026, 18:09:40 UTC
Last updated: 09/21/2026, 22:01:36 UTC
Views: 53
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