# CVE-2026-69901: Microsoft Teams for Android origin validation error

Source: https://junglewise.ai/threats/cve-2026-69901-origin-validation-error-in-microsoft-teams-for-android-allows-an  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-69901 · Severity: high · CVSS 7.5 · Published 2026-11-10

Microsoft Teams for Android is a messaging and collaboration app used by businesses worldwide. An origin validation error allows attackers to spoof communications over the network, potentially impersonating legitimate senders and deceiving users into trusting malicious messages or links. This could lead to phishing attacks, credential theft, or distribution of malware within an organization.

Technologies: [Microsoft Teams for Android](https://junglewise.ai/threats/technologies/teams-for-android). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-69901 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-69901 being exploited in the wild.

**How severe is CVE-2026-69901?** High severity, with a CVSS score of 7.5, published 10 November 2026.

**Which products and versions are affected?** Microsoft Teams for Android.

**Is there a fix for CVE-2026-69901?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-69901 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-69901?** Check whether you run Microsoft Teams for Android. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

An origin validation flaw in Microsoft Teams for Android fails to properly verify the source of incoming network communications, allowing an unauthenticated attacker to spoof messages or content. The vulnerability can be exploited over the network without requiring user interaction or prior authentication, enabling attackers to impersonate legitimate senders. A patch is expected to be available through Microsoft's security update process.

## Affected products

- Microsoft Teams for Android

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69901](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69901)

## Related threats

- [Microsoft Teams for Android code injection spoofing vulnerability](https://junglewise.ai/threats/cve-2026-122979-improper-control-of-generation-of-code-code-injection-in)
- [Microsoft Teams for Android origin validation bypass](https://junglewise.ai/threats/cve-2026-69559-microsoft-teams-for-android-origin-validation-bypass)
- [Microsoft Teams for Android information disclosure in network communication](https://junglewise.ai/threats/cve-2026-65812-microsoft-teams-for-android-information-disclosure-in-network)
- [Microsoft Teams for Android path traversal remote code execution](https://junglewise.ai/threats/cve-2026-65768-microsoft-teams-for-android-path-traversal-remote-code-execution)
- [Microsoft Teams for Android cross-site scripting](https://junglewise.ai/threats/cve-2026-65767-microsoft-teams-for-android-cross-site-scripting)