CVE-2026-76157: Datiphy Data Management Center Auth Bypass

CVE-2026-76157 Overview

CVE-2026-76157 is a missing authentication vulnerability in the Datiphy Data Management Center upload API endpoint. The flaw affects versions v8.3.0 through v8.5.1 and allows an unauthenticated remote attacker to upload arbitrary files to the server's configured upload directory. The weakness is classified under CWE-306: Missing Authentication for a Critical Function.

Because the upload endpoint enforces no identity checks, an attacker only needs network reachability to the service to place files on disk. This creates a direct path to integrity and availability compromise of the appliance.

Critical Impact
An unauthenticated remote attacker can write arbitrary files to the Datiphy Data Management Center upload directory over the network.

Affected Products

Datiphy Data Management Center v8.3.0
Datiphy Data Management Center versions between v8.3.0 and v8.5.1
Datiphy Data Management Center v8.5.1

Discovery Timeline

2026-08-21 - CVE-2026-76157 published to NVD
2026-08-26 - Last updated in NVD database

Technical Details for CVE-2026-76157

Vulnerability Analysis

The Datiphy Data Management Center exposes an upload API endpoint that accepts file uploads without verifying the caller's identity. Any client that can reach the endpoint over the network can submit a file, and the server writes it to the configured upload directory. The vulnerability maps to CWE-306, which covers critical functions reachable without authentication.

Exploitation requires no user interaction and no prior access. An attacker only needs the network path to the service and the request format expected by the upload handler. This aligns with the vector description of a network-based, low-complexity attack requiring no privileges.

The consequences depend on how the appliance treats the upload directory. If the directory is served by a web process, executes files, or is later parsed by trusted components, the attacker can pivot from arbitrary write to command execution, tampering with management data, or denial of service by exhausting storage.

Root Cause

The root cause is the absence of an authentication check on the upload API handler. The endpoint treats every request as authorized and passes user-controlled content directly to the file-writing routine that targets the configured upload directory.

Attack Vector

The attack vector is network-based and unauthenticated. An attacker sends a crafted HTTP request to the upload endpoint with a file payload and a chosen filename. The server accepts the request and writes the file into the upload directory that the operator configured for the product. Details of the endpoint and payload format are documented in the Zuso Security Advisory.

Detection Methods for CVE-2026-76157

Indicators of Compromise

Unexpected files appearing in the Datiphy Data Management Center configured upload directory, especially executables, scripts, archives, or web content.
HTTP requests to the upload API endpoint originating from source addresses outside the administrator population.
File creation events on the appliance filesystem written by the Datiphy service account without a matching authenticated administrative session.

Detection Strategies

Monitor the upload API endpoint at the reverse proxy or web server layer for POST requests that lack a valid administrative session cookie or token.
Baseline the contents of the upload directory and alert on new file writes, extension changes, or size anomalies.
Correlate authentication logs with upload events to identify uploads that have no preceding successful login.

Monitoring Recommendations

Forward Datiphy application, access, and filesystem audit logs to a centralized analytics platform for retention and correlation.
Alert on any 2xx response from the upload endpoint that is not preceded by an authenticated administrative session in the same source context.
Track outbound connections from the appliance after upload events to identify possible callbacks from planted payloads.

How to Mitigate CVE-2026-76157

Immediate Actions Required

Restrict network access to the Datiphy Data Management Center management interface using firewall rules, allowlisting only trusted administrative networks.
Inspect the configured upload directory for unexpected files and remove any artifact that cannot be tied to a known administrator action.
Rotate credentials, API keys, and integration secrets held by the appliance if evidence of unauthorized upload is found.

Patch Information

Refer to the Zuso Security Advisory for vendor remediation guidance. Operators should upgrade to a Datiphy Data Management Center release later than v8.5.1 that enforces authentication on the upload API endpoint, once such a version is made available by the vendor.

Workarounds

Place the Datiphy management interface behind a reverse proxy that enforces authentication before requests reach the upload API endpoint.
Block external access to the upload API path at the network edge and permit it only from a jump host or VPN segment used by administrators.
Mount the upload directory with the noexec option where supported to reduce the risk of planted files being executed by the appliance.

bash

# Example nginx snippet restricting the upload endpoint to a trusted admin subnet
location /api/upload {
    allow 10.10.20.0/24;   # admin management subnet
    deny  all;
    proxy_pass http://datiphy_backend;
}