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High

Information Disclosure in Microsoft Authenticator

IdentifiersCVE-2026-41615CWE-200· Exposure of Sensitive Information…

CVE-2026-41615 is an information disclosure vulnerability in Microsoft Authenticator on Android and iOS. According to the provided content, the flaw exposes sensitive information to an unauthorized actor over a network and can disclose a user's work account sign-in access token after user interaction with a malicious request. The mention contexts indicate the issue can leak sign-in access tokens and may be abused through fake approval requests in the authentication workflow. The CVSS v3.1 vector provided in the source is AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can disclose a Microsoft Authenticator work-account sign-in access token to an unauthorized attacker. With that token, an attacker may gain unauthorized access to data and services the victim is authorized to use, including sensitive organizational information. The supplied advisory also states high confidentiality, integrity, and availability impacts with changed scope, indicating downstream compromise of connected resources beyond the vulnerable application itself.

Mitigation

If you can’t patch tonight, do this now.

Ensure Microsoft Authenticator is fully updated across affected Android and iOS devices. Where possible, enable automatic app updates so patched versions are deployed promptly. Until updates are confirmed, reduce exposure by instructing users not to approve unexpected or suspicious authentication prompts or requests, particularly unsolicited approval requests that could be used to trigger token disclosure or credential theft workflows.

Remediation

Patch, then assume compromise.

Apply Microsoft's fix by updating Microsoft Authenticator to the latest available version on affected devices. For Android, update through the Google Play Store if automatic updates are not enabled. More generally, ensure both Android and iOS deployments are running the latest vendor-provided release that addresses CVE-2026-41615.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
Microsoft CorporationAuthenticatorapplication
Microsoft CorporationAuthenticator For Iosapplication

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

18 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

18 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity16

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-41615
NVD
nvd.nist.gov/vuln/detail/CVE-2026-41615
MITRE CWE · CWE-200
Exposure of Sensitive Information to an…
Vendor Advisory
msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41615