CVE-2026-49001: Cross-Site Request Forgery Vulnerability

CVE-2026-49001 Overview

CVE-2026-49001 is a Cross-Site Request Forgery (CSRF) vulnerability disclosed in a ZTE product. The flaw allows an attacker to leverage an authenticated user's active session to forge cross-site requests. Successful exploitation induces the execution of unintended operations, including tampering with configuration data. The weakness is tracked under CWE-352. Exploitation requires user interaction and high privileges on the authenticated account, which limits practical attack scenarios. ZTE published a security bulletin describing the issue and remediation guidance.

Critical Impact
Successful CSRF exploitation can tamper with device configuration data, undermining integrity of administrative settings on affected ZTE systems.

Affected Products

ZTE product (see vendor advisory for affected models and firmware versions)
Refer to the ZTE Security Bulletin for the complete affected product list

Discovery Timeline

2026-05-27 - CVE-2026-49001 published to NVD
2026-05-27 - Last updated in NVD database

Technical Details for CVE-2026-49001

Vulnerability Analysis

The vulnerability stems from missing or insufficient anti-CSRF protections on state-changing endpoints in the affected ZTE product. When an authenticated administrator visits an attacker-controlled page, the browser automatically attaches valid session credentials to forged requests directed at the management interface. The server processes these forged requests as legitimate, enabling unauthorized configuration changes.

The issue maps to [CWE-352] Cross-Site Request Forgery. The attack vector is network-based, but successful exploitation requires the victim to hold high privileges and to interact with attacker-supplied content. These preconditions reduce the likelihood of opportunistic mass exploitation while keeping targeted attacks viable. EPSS data places the exploitation probability at 0.016%.

Root Cause

The affected endpoints accept authenticated state-changing requests without validating an unpredictable, per-session token or verifying request origin headers. Browsers transmit session cookies automatically with cross-origin requests, so the absence of CSRF tokens or strict SameSite cookie attributes allows external sites to invoke privileged actions on behalf of the logged-in user.

Attack Vector

An attacker hosts a malicious page or embeds crafted HTML in a delivery channel under their control. The attacker then lures an authenticated administrator to load that content while the admin holds an active session to the ZTE management interface. The page issues an HTTP request, such as a form submission or scripted POST, against a configuration endpoint. The browser attaches the administrator's session cookie, and the device executes the configuration change as if the admin had requested it.

The exploitation flow relies on standard browser request mechanics: an attacker-controlled HTML form auto-submits to a vulnerable endpoint on the device's management interface, carrying the victim's session cookie. No exploit code is required beyond a crafted HTML page. See the ZTE Security Bulletin for vendor-specific technical detail.

Detection Methods for CVE-2026-49001

Indicators of Compromise

Unexpected configuration changes on ZTE devices that coincide with administrator web sessions
HTTP Referer or Origin headers on management requests pointing to external, non-administrative domains
Administrative actions logged from sessions where the user did not actively initiate the change

Detection Strategies

Inspect web server and management interface logs for state-changing requests whose Origin or Referer header does not match the device hostname
Correlate administrator browser activity with configuration change audit logs to identify mismatches
Alert on configuration write operations occurring within seconds of an admin loading an unrelated external URL

Monitoring Recommendations

Forward management interface access logs to a centralized log platform for retention and correlation
Establish a baseline of expected administrative actions and flag deviations for review
Monitor for repeated POST requests to configuration endpoints lacking valid anti-CSRF tokens

How to Mitigate CVE-2026-49001

Immediate Actions Required

Apply the firmware update referenced in the ZTE Security Bulletin as soon as it is available for your model
Restrict access to the device management interface to dedicated administrative networks or VPN segments
Require administrators to log out of management sessions immediately after completing changes

Patch Information

ZTE has published a security bulletin for CVE-2026-49001. Administrators should consult the ZTE Security Bulletin to identify the fixed firmware version applicable to their product and apply it through the standard upgrade process.

Workarounds

Use a dedicated browser or browser profile for device administration and avoid browsing untrusted sites in the same session
Enforce short administrative session timeouts to reduce the window in which forged requests can succeed
Where supported, configure the management interface to require re-authentication for sensitive configuration changes

bash

# Example: restrict management interface access at the network edge
# Replace MGMT_NET and DEVICE_IP with environment-specific values
iptables -A INPUT -p tcp -s MGMT_NET -d DEVICE_IP --dport 443 -j ACCEPT
iptables -A INPUT -p tcp -d DEVICE_IP --dport 443 -j DROP