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Full vulnerability report · 2026
CVE-2026-69559High confidence

Microsoft Teams for Android Information Disclosure Vulnerability

Microsoft · Microsoft Teams for Android

5.8MediumCVSS 3.1
Recommended action
Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Medium, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 0.32% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Microsoft Microsoft Teams for Android and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: As exposure requiresRemediation target: Within 365 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-73702

No EUVD known-exploited evidence

Origin validation error in Microsoft Teams for Android allows an authorized attacker to disclose information over a network.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
5.8 · CVSS 3.1
Advisory evidence
No linked advisory details stored yet
Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available
01

What, why and how

Origin validation error in Microsoft Teams for Android allows an authorized attacker to disclose information over a network.

What

Origin validation error in Microsoft Teams for Android allows an authorized attacker to disclose information over a network.

Why

The product does not properly verify that the source of data or communication is valid.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Origin validation error in Microsoft Teams for Android allows an authorized attacker to disclose information over a network.

Why

The product does not properly verify that the source of data or communication is valid.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Origin Validation Error → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Network
Privileges required
Low: a basic authenticated account is required
User interaction
Required interaction required
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Changed: exploitation can affect a different security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-346 ↗

CWE-346: Origin Validation Error. The product does not properly verify that the source of data or communication is valid.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRLowPrivileges required: The attacker needs basic user-level privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SChangedScope: The attack can affect a component governed by a different security authority.CHighConfidentiality impact: A successful attack can cause a major loss.INoneIntegrity impact: No direct loss is represented by this metric.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkCWE-346
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-73702Official EUVD mapping

Origin validation error in Microsoft Teams for Android allows an authorized attacker to disclose information over a network.

Official EUVD record ↗
BSI · German · WID-SEC-2026-3234Microsoft Office Produkte: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in verschiedenen Microsoft Office Produkten, Microsoft Office Online Server, Microsoft 365 Apps, Microsoft SharePoint, Microsoft Teams und Microsoft Skype ausnutzen, um erhöhte Berechtigungen zu erlangen, um Code auszuführen, um Informationen offenzulegen und um den Nutzer zu täuschen.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-1149Multiples vulnérabilités dans les produits Microsoft

septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69380 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69382 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69402 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69409 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69417 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69439 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69464 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69465 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69522 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69559 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69562 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69615 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69636 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69641 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69642 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69646 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69649 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69683 du 08 septembre 2026 Bulletin de sécurité Microsoft CVE-2026-69690 du 08 septembre 2026 Bulletin de sécurité Micr

Official advisory ↗
CSIRT Italia · Italian · aggiornamenti-mensili-microsoft-24Aggiornamenti Mensili Microsoft

nuova finestra - - CVE-2026-69441 : apre una nuova finestra - - CVE-2026-69562 : apre una nuova finestra - - CVE-2026-69442 : apre una nuova finestra - - CVE-2026-69563 : apre una nuova finestra - - CVE-2026-69560 : apre una nuova finestra - - CVE-2026-69440 : apre una nuova finestra - - CVE-2026-69561 : apre una nuova finestra - - CVE-2026-69434 : apre una nuova finestra - - CVE-2026-69556 : apre una nuova finestra - - CVE-2026-69432 : apre una nuova finestra - - CVE-2026-69553 : apre una nuova finestra - - CVE-2026-69433 : apre una nuova finestra - - CVE-2026-69554 : apre una nuova finestra - - CVE-2026-69438 : apre una nuova finestra - - CVE-2026-69559 : apre una nuova finestra - - CVE-2026-69439 : apre una nuova finestra - - CVE-2026-69436 : apre una nuova finestra - - CVE-2026-69430 : apre una nuova finestra - - CVE-2026-69551 : apre una nuova finestra - - CVE-2026-69431 : apre una nuova finestra - - CVE-2026-69552 : apre una nuova finestra - - CVE-2026-69429 : apre una nuova finestra - - CVE-2026-69423 : apre una nuova finestra - - CVE-2026-69544 : apre una nuova finestra - - CVE-2026-69424 : apre una nuova finestra - - CVE-2026-69421 : apre una nuova finestra - - CVE-2026-69542 : apre una nuova finestra - - CVE-2026-69422 : apre una nuova finestra - - CVE-2026-69427 : apre una nuova fi

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-036071マイクロソフトのMicrosoft Teamsにおける同一生成元ポリシー違反に関する脆弱性

Microsoft Teams for Androidのオリジン検証エラーにより、権限を持つ攻撃者がネットワーク上で情報を開示する可能性があります。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6946MS 9월 보안 위협에 따른 정기 보안 업데이트 권고

6-69547 | Windows DHCP 서버 원격 코드 실행 취약성 | | Windows RNDIS | CVE-2026-69548 | Windows RNDIS 정보 유출 취약성 | | Virtual Hard Disk (VHD) Miniport Driver | CVE-2026-69549 | 가상 하드 디스크(VHD) 미니포트 드라이버 권한 상승 취약성 | | Windows DNS | CVE-2026-69551 | Windows DNS Server Remote Code Execution Vulnerability | | Windows Print Spooler Components | CVE-2026-69552 | Windows 인쇄 스풀러 구성 요소 정보 공개 취약성 | | Windows Hyper-V | CVE-2026-69553 | Windows Hyper-V 권한 상승 취약성 | | Microsoft Windows Search Component | CVE-2026-69554 | Microsoft Windows Search 구성 요소 변조 취약성 | | Microsoft Office Word | CVE-2026-69556 | Microsoft Office Word 원격 코드 실행 취약성 | | Microsoft Teams for Android | CVE-2026-69559 | Android용 Microsoft Teams 정보 유출 취약성 | | Windows Work Folder Service | CVE-2026-69560 | Windows 작업 폴더 서비스 권한 상승 취약성 | | Windows CD-ROM Driver | CVE-2026-69561 | Windows CD-ROM 드라이버 권한 상승 취약성 | | SQL Server | CVE-2026-69562 | Microsoft SQL Server 정보 유출 취약성 | | Windows Program Compatibility Assistant Service | CVE-2026-69563 | Windows 프로그램 호환성 관리자 서비스 권한 상승 취약성 | | Windows Online Certificate Status Protocol (OCSP) | CVE-2026-69564 | Windows 온라인 인증서 상태 프로토콜(OCSP) 권한 상승 취약성 | | Windows NTFS | CVE-2026-69566 | Windows NTFS 원격 코드 실행 취약성 | | Windows NTFS | CVE-2026-69567 | Windows NTFS 권한 상승 취약성 | | Windows Storage Spaces Controller | CVE-2026-6956

Official advisory ↗
NCSC-NL · Dutch · NCSC-2026-0352Kwetsbaarheden verholpen in Microsoft Office

Een kwaadwillende kan de kwetsbaarheden misbruiken om aanvallen uit te voeren die kunnen leiden tot de categorieën schade, zoals genoemd in onderstaande tabel. Voor succesvol misbruik moet de kwaadwillende het slachtoffer misleiden een malafide bestand te openen of link te volgen. Microsoft heeft voor Office 114 kwetsbaarheden verholpen. De 4 ernstigste kwetsbaarheden bevinden zich in meerdere Office componenten en hebben een CVSS score van 9.8 toegewezen gekregen. Kwaadwillenden met toegang tot deze componenten kunnen zonder voorafgaande authenticatie mogelijk code uitvoeren of zich toegang verschaffen tot het kwetsbare systeem. Deze kwetsbaarheden zijn in onderstaande tabel weergegeven. De overige 110 kwetsbaarheden variëren in ernst van middelmatig tot hoog en kritiek. Raapleeg het MSRC-portaal voor aanvullende informatie. ``` |----------------|------|---------------------------|-------------------------------------| | CVE-ID | CVSS | Component | Impact | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-78505 | 9,80 | Office | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-78509 | 9,80 | Outlook | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-78510 | 9,80 | Outlook | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| | CVE-2026-66302 | 9,80 | SKYPE | Uitvoeren van willekeurige code | |----------------|------|---------------------------|-------------------------------------| ```

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Microsoft Teams for Android: 1.0.0 < 1.0.0.2026142702
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 8 Sept 2026 · Last source change 1 Oct 2026, 22:59 UTC · CWE-346 · Origin Validation Error

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-09-09
European sourceENISA EUVD · EUVD-2026-73702
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceOther authority
NVD statusNVD enriched

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24.
    Before
    remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24 · vendor advisory: msrc.microsoft.com/CVE-2026-69559
    After
    vendor advisory: msrc.microsoft.com/CVE-2026-69559
    secure@microsoft.com ↗
  2. Remediation statusRemediation status changed from Mitigation available to Awaiting fix.
    Before
    Mitigation available
    After
    Awaiting fix
    secure@microsoft.com ↗
  3. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24.
    Before
    remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24 · vendor advisory: msrc.microsoft.com/CVE-2026-69559
    After
    vendor advisory: msrc.microsoft.com/CVE-2026-69559
    secure@microsoft.com ↗
  4. Remediation statusRemediation status changed from Mitigation available to Awaiting fix.
    Before
    Mitigation available
    After
    Awaiting fix
    secure@microsoft.com ↗
  5. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24.
    Before
    remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24 · vendor advisory: msrc.microsoft.com/CVE-2026-69559
    After
    vendor advisory: msrc.microsoft.com/CVE-2026-69559
    secure@microsoft.com ↗
  6. Remediation statusRemediation status changed from Mitigation available to Awaiting fix.
    Before
    Mitigation available
    After
    Awaiting fix
    secure@microsoft.com ↗
  7. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24.
    Before
    remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24 · vendor advisory: msrc.microsoft.com/CVE-2026-69559
    After
    vendor advisory: msrc.microsoft.com/CVE-2026-69559
    secure@microsoft.com ↗
  8. Remediation statusRemediation status changed from Mitigation available to Awaiting fix.
    Before
    Mitigation available
    After
    Awaiting fix
    secure@microsoft.com ↗
  9. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24.
    Before
    remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24 · vendor advisory: msrc.microsoft.com/CVE-2026-69559
    After
    vendor advisory: msrc.microsoft.com/CVE-2026-69559
    secure@microsoft.com ↗
  10. Vendor guidanceAuthoritative vendor guidance changed: added vendor advisory: msrc.microsoft.com/CVE-2026-69559; removed remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24.
    Before
    remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24
    After
    vendor advisory: msrc.microsoft.com/CVE-2026-69559
    secure@microsoft.com ↗
  11. Remediation statusRemediation status changed from Mitigation available to Awaiting fix.
    Before
    Mitigation available
    After
    Awaiting fix
    secure@microsoft.com ↗
  12. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24.
    Before
    remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24
    After
    no authoritative guidance recorded
    CNA ↗
  13. Remediation statusRemediation status changed from Mitigation available to Awaiting fix.
    Before
    Mitigation available
    After
    Awaiting fix
    CNA ↗
  14. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24.
    Before
    remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24
    After
    no authoritative guidance recorded
    CNA ↗
  15. Remediation statusRemediation status changed from Mitigation available to Awaiting fix.
    Before
    Mitigation available
    After
    Awaiting fix
    CNA ↗
  16. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24.
    Before
    remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24
    After
    no authoritative guidance recorded
    CNA ↗
  17. Remediation statusRemediation status changed from Mitigation available to Awaiting fix.
    Before
    Mitigation available
    After
    Awaiting fix
    CNA ↗
  18. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24.
    Before
    remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24
    After
    no authoritative guidance recorded
    CNA ↗
  19. Remediation statusRemediation status changed from Mitigation available to Awaiting fix.
    Before
    Mitigation available
    After
    Awaiting fix
    CNA ↗
  20. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24.
    Before
    remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24
    After
    no authoritative guidance recorded
    CNA ↗
  21. Remediation statusRemediation status changed from Mitigation available to Awaiting fix.
    Before
    Mitigation available
    After
    Awaiting fix
    CNA ↗
  22. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24.
    Before
    remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24
    After
    no authoritative guidance recorded
    CNA ↗
  23. Remediation statusRemediation status changed from Mitigation available to Awaiting fix.
    Before
    Mitigation available
    After
    Awaiting fix
    CNA ↗
  24. Vendor guidanceAuthoritative vendor guidance changed: removed remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24.
    Before
    remediation: acn.gov.it/aggiornamenti-mensili-microsoft-24
    After
    no authoritative guidance recorded
    CNA ↗
  25. Remediation statusRemediation status changed from Mitigation available to Awaiting fix.
    Before
    Mitigation available
    After
    Awaiting fix
    CNA ↗
  26. Affected versionsThe structured affected or fixed version information changed.
    Before
    Microsoft Teams for Android: 1.0.0 < 1416/1.0.0.2026142702 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    Microsoft Teams for Android: 1.0.0 < 1.0.0.2026142702 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    CNA ↗
  27. Affected versionsThe structured affected or fixed version information changed.
    Before
    1.0.0 < 1416/1.0.0.2026142702 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    Microsoft Teams for Android: 1.0.0 < 1416/1.0.0.2026142702 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    CNA ↗
  28. ENISA EUVD mappingEUVD-2026-73702 was added to the official ENISA EUVD mapping for this CVE.
    Before
    not recorded
    After
    {"euvdId":"EUVD-2026-73702"}
    ENISA EUVD ↗
  29. Remediation statusRemediation status changed from Awaiting fix to Mitigation available.
    Before
    Awaiting fix
    After
    Mitigation available
    CSIRT Italia ↗
  30. Catalogue recordCVE added to the BlackTree catalogue.
    CNA ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Remediation guidance recorded
ENISA EUVD · EUVD-2026-73702↗CSIRT Italia remediation guidance↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-69559 · cve.blacktree.nl