CVE-2025-48464: Sync Account Information Disclosure Flaw

CVE-2025-48464 Overview

CVE-2025-48464 is an information disclosure vulnerability that allows an unauthenticated attacker to access a victim's Sync account data. Exposed data includes account credentials and email protection information. The flaw is classified under [CWE-200] (Exposure of Sensitive Information to an Unauthorized Actor).

Exploitation requires local access, high attack complexity, and user interaction, which limits practical attack scenarios. However, successful exploitation compromises the confidentiality of stored credentials without affecting integrity or availability.

Critical Impact
Unauthenticated attackers can retrieve stored Sync account credentials and email protection metadata from a targeted victim.

Affected Products

Product with Sync account functionality (specific vendor and product not disclosed in NVD entry)
Refer to the Tuxplorer Security Update for affected version details
See the CSA Advisory AL-2025-097 for additional product guidance

Discovery Timeline

2025-10-08 - CVE-2025-48464 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-48464

Vulnerability Analysis

The vulnerability enables an unauthenticated actor to reach Sync account data belonging to another user. The disclosed material includes account credentials and email protection information stored or referenced by the Sync feature. Attack complexity is high because the attacker must satisfy specific local conditions and rely on user interaction to trigger the exposure.

The issue maps to [CWE-200], where sensitive data is exposed to actors that should not have access. Because the flaw affects confidentiality alone, integrity and availability of the affected system are not directly impacted.

EPSS data places the probability of exploitation activity at a low level, and no public proof-of-concept has been catalogued in NVD references at the time of publication.

Root Cause

The root cause is insufficient access control over Sync account data storage or retrieval paths. The affected implementation does not adequately restrict access to credential material and email protection metadata associated with a signed-in Sync account.

Detailed root-cause specifics are covered in the Tuxplorer Security Update.

Attack Vector

Exploitation requires local access to the environment where the vulnerable Sync component is present. The attacker also needs a targeted user to perform an action that triggers the exposure path. Because privileges required are none, no prior authentication to the affected component is needed once local access exists.

No verified exploit code is published in NVD-linked resources. Technical exploitation steps should be reviewed in the referenced advisories rather than reproduced here.

Detection Methods for CVE-2025-48464

Indicators of Compromise

Unexpected reads or copies of Sync account credential stores or configuration files on user endpoints.
Local processes accessing browser or application profile directories associated with Sync features without user-initiated activity.
Outbound transfers of small credential-sized artifacts shortly after user interaction with a suspicious file or link.

Detection Strategies

Monitor file access on Sync-related profile directories and credential databases for non-owner or non-parent processes.
Alert on new or unsigned binaries invoking APIs that read stored credentials or account metadata.
Correlate user interaction events (opening documents, links, or archives) with immediately subsequent credential-store reads.

Monitoring Recommendations

Ingest endpoint process, file, and registry telemetry into a centralized data lake for retrospective hunting.
Track authentication anomalies on associated email and Sync services following local endpoint anomalies.
Review the CSA Advisory AL-2025-097 for vendor-specific detection guidance as it becomes available.

How to Mitigate CVE-2025-48464

Immediate Actions Required

Apply the vendor patch referenced in the Tuxplorer Security Update as soon as it is available in your environment.
Rotate credentials stored in Sync accounts on any endpoint suspected of exposure to untrusted local users or files.
Restrict local access to endpoints that hold Sync-enabled sessions with sensitive credentials.

Patch Information

Refer to the vendor guidance linked in the Tuxplorer Security Update and the CSA Advisory AL-2025-097 for the fixed version and update procedures. NVD does not currently list a vendor advisory URL directly for CVE-2025-48464.

Workarounds

Disable Sync features on shared or multi-user endpoints until patched builds are deployed.
Enforce full-disk encryption and strict local user separation to reduce local attacker access to Sync data at rest.
Require multi-factor authentication on email and Sync accounts so that leaked credentials alone do not grant access.