EUVD-2026-73702
GHSA-ww7p-222c-ww69
Severity by source
AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N
Network vector for cross-origin attack; AC:H for complex origin-bypass conditions; PR:L for required Teams auth; UI:R mandatory; S:C reflects cross-origin boundary breach; C:H for sensitive data disclosure; no integrity or availability impact.
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
Lifecycle Timeline
5DescriptionCVE.org
Origin validation error in Microsoft Teams for Android allows an authorized attacker to disclose information over a network.
AnalysisAI
Origin validation error (CWE-346) in Microsoft Teams for Android enables an authenticated network attacker with user interaction to disclose sensitive cross-origin information. Affecting all versions prior to 1416/1.0.0.2026142702, the flaw allows a malicious origin to extract data that the Teams application fails to properly restrict, resulting in a scope-changed confidentiality breach rated C:H by Microsoft. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires: (1) the target is running Microsoft Teams for Android on a version below 1416/1.0.0.2026142702; (2) the attacker holds at least a low-privilege authenticated Teams session (PR:L) sufficient to deliver content to the victim; (3) the victim user must actively interact with attacker-controlled content within the Teams client (UI:R); (4) attack complexity is high (AC:H), meaning specific timing or environmental conditions must align for the origin validation bypass to succeed. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 5.8 reflects meaningful exploitation barriers: AC:H (high complexity, requiring specific conditions and timing), PR:L (an authenticated Teams session is needed), and UI:R (victim must interact with attacker-controlled content). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Update Microsoft Teams for Android to version 1416/1.0.0.2026142702 or later via the Google Play Store, as confirmed by the vendor patch advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69559. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-346 – Origin Validation Error
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External POC / Exploit Code
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