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Response snapshot Oct 27, 2026, 13:06 UTC

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VulnerabilityCVE-2026-80097

Microsoft Authenticator Flaw Let Permissionless Android Apps Steal Work Account Tokens

Microsoft has fixed a flaw in its Authenticator app for Android that let a malicious app with no permissions pose as a trusted Microsoft app, such as Teams, and collect sign-in tokens for a victim's work account.

At a glance

Exploited
Not known
Severity
8.6 High (CVSS 3.1)
Chance of exploitation
Not estimated
Sources
2 independent sources

What to do

Check the vendor advisory linked from the article for affected versions and fixes.

Read CVE Program CNA microsoft (opens a new tab)

What happened

Microsoft has fixed a flaw in its Authenticator app for Android that let a malicious app with no permissions pose as a trusted Microsoft app, such as Teams, and collect sign-in tokens for a victim's work account.

Microsoft tracks the flaw as CVE-2026-80097 and fixed it in Authenticator for Android version 6.2606.4246, so anyone using the app should update.

In the researchers' tests,

Scores and how they were measured

CVSS base severity

8.6

Version 3.1As of

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

Measurement source (opens a new tab)

How bad it is if exploited. Not a prediction of exploitation or proof you are exposed.

EPSS probability

Not available

A model's estimate of exploitation in the next 30 days, not certainty or your own risk.

Related technology

Sources

  1. Reporting

    The Hacker News: Microsoft Authenticator Flaw Let Permissionless Android Apps Steal Work Account Tokens (opens a new tab)

    The article reports this vulnerability. It is reporting, not independently primary-confirmed or locally reviewed.

    Published Checked

  2. Reporting

    The Hacker News syndication feed (opens a new tab)

    The RSS/Atom/RDF entry supplied this exact link and any available title, date, and excerpt.

    Published Date not suppliedChecked

  3. Primary source

    CVE Program CNA microsoft (opens a new tab)

    The published CVE-2026-80097 document's CNA supplies this CVSS 3.1 base score, vector, and authoritative source update date.

    Published Checked

Cite this record

For factual claims, cite the primary sources above; cite KEVWire for its compilation, dates, and classifications.

APA

KEVWire. (2026, October 27). Microsoft Authenticator Flaw Let Permissionless Android Apps Steal Work Account Tokens (CVE-2026-80097). https://kevwire.com/record/CVE-2026-80097

MLA

"Microsoft Authenticator Flaw Let Permissionless Android Apps Steal Work Account Tokens (CVE-2026-80097)." KEVWire, 27 Oct. 2026, kevwire.com/record/CVE-2026-80097.

Chicago

KEVWire. "Microsoft Authenticator Flaw Let Permissionless Android Apps Steal Work Account Tokens (CVE-2026-80097)." Last modified October 27, 2026. https://kevwire.com/record/CVE-2026-80097.

Evidence summary (plain text)

Microsoft Authenticator Flaw Let Permissionless Android Apps Steal Work Account Tokens (Oct 27, 2026).
Microsoft has fixed a flaw in its Authenticator app for Android that let a malicious app with no permissions pose as a trusted Microsoft app, such as Teams, and collect sign-in tokens for a victim's work account.

Microsoft tracks the flaw as CVE-2026-80097 and fixed it in Authenticator for Android version 6.2606.4246, so anyone using the app should update.

In the researchers' tests,
CVSS 8.6 (version 3.1; evidence as of Oct 14, 2026; https://cveawg.mitre.org/api/cve/CVE-2026-80097).
Sources:
The Hacker News: Microsoft Authenticator Flaw Let Permissionless Android Apps Steal Work Account Tokens: https://thehackernews.com/2026/10/microsoft-authenticator-flaw-let.html
The Hacker News syndication feed: https://feeds.feedburner.com/TheHackersNews
CVE Program CNA microsoft: https://cveawg.mitre.org/api/cve/CVE-2026-80097
Record ID: CVE-2026-80097.
Record origin: Ingested record.
AI evidence: Not assessed.
Known exploitation: Not assessed.
Zero-day status: Not assessed. KEV membership alone does not establish zero-day status.
About this data

This record was ingested from a data source. Retrieved: Oct 27, 2026, 13:05 UTC. Ingestion is not an independent editorial investigation.

Syndicated reporting, unreviewed by KEVWire and not independently primary-confirmed. Consult the exact article and any primary disclosure it links.

A CISA KEV listing documents known exploitation, not necessarily a zero-day; absence from the catalog does not prove a vulnerability has never been exploited.

Technology tags indicate possible relevance, not verified exposure. Confirm the affected product, version, and configuration against your own inventory; KEVWire does not scan your systems.

A personal reading checklist on this device, not verified remediation.

Record JSON

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Record details

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