CVE-2026-12812 Overview
CVE-2026-12812 is an HTML injection vulnerability affecting Radware Cyber Controller versions up to 10.11.0. The flaw resides in the HTML Report Generation component, where attacker-controlled input is rendered without proper sanitization. Authenticated remote attackers can inject HTML markup that executes in the context of users viewing generated reports. The vulnerability is tracked under CWE-74 (Improper Neutralization of Special Elements in Output). Public disclosure has occurred, and according to the VulDB submission, Radware did not respond to early outreach about the issue.
Critical Impact
Authenticated attackers can inject arbitrary HTML into generated reports, enabling content spoofing and phishing against report consumers.
Affected Products
- Radware Cyber Controller versions up to and including 10.11.0
- HTML Report Generation component
- Downstream report consumers viewing rendered output
Discovery Timeline
- 2026-06-21 - CVE-2026-12812 published to NVD
- 2026-06-23 - Last updated in NVD database
Technical Details for CVE-2026-12812
Vulnerability Analysis
The vulnerability stems from improper neutralization of HTML special characters inside the report generation pipeline of Radware Cyber Controller. User-supplied data flows into HTML report output without encoding of characters such as <, >, and ". As a result, attacker-controlled markup is rendered verbatim when the report is opened by an analyst or administrator. The issue is classified as injection under CWE-74 and is exploitable across the network with low-privilege authentication and user interaction.
The impact is limited to integrity of rendered content. Confidentiality and availability are not directly affected based on the CVSS 4.0 vector. However, injected HTML can be used to forge UI elements, embed misleading links, or stage phishing inside what appears to be a trusted internal report.
Root Cause
The root cause is missing or insufficient output encoding when the HTML Report Generation component composes report bodies. Input fields that accept device names, descriptions, or other operator-controlled strings are concatenated into HTML without context-aware escaping. See the VulDB entry for CVE-2026-12812 for additional technical references.
Attack Vector
An authenticated user submits crafted input containing HTML tags into a field that is later included in a generated report. When a second user, typically an administrator reviewing operational data, opens the report, the injected HTML is parsed by the rendering engine. The attacker can introduce fake form fields, hyperlinks pointing to attacker infrastructure, or markup designed to mislead the reader. The vulnerability requires network reachability to the Cyber Controller management interface, valid low-privilege credentials, and user interaction with the generated report.
Detection Methods for CVE-2026-12812
Indicators of Compromise
- Report fields containing unexpected HTML tags such as <a>, <form>, <iframe>, or <script> in stored configuration objects.
- Outbound requests from report viewers to unfamiliar domains immediately after opening a Cyber Controller report.
- Audit log entries showing low-privilege accounts editing object names or descriptions with payload-like content.
Detection Strategies
- Inspect stored Cyber Controller object metadata for HTML control characters that should not appear in operational names or descriptions.
- Compare generated report source against expected templates to surface injected tags or attributes.
- Alert on report-viewer browsers issuing network requests to domains not on an allowlist of internal infrastructure.
Monitoring Recommendations
- Forward Cyber Controller administrative audit logs to a centralized log platform and retain change events for object names and descriptions.
- Monitor authentication events for low-privilege accounts that modify objects subsequently included in scheduled reports.
- Track report generation and download events to correlate suspicious edits with viewer activity.
How to Mitigate CVE-2026-12812
Immediate Actions Required
- Restrict access to the Cyber Controller management interface to trusted administrative networks only.
- Audit existing object names, descriptions, and free-text fields for HTML markup and sanitize entries.
- Limit accounts that can create or edit objects feeding into HTML reports to vetted personnel.
Patch Information
No vendor patch is referenced in the public advisory. The VulDB submission notes that Radware did not respond to early disclosure outreach. Operators should monitor Radware support channels for an official fix and apply it once available.
Workarounds
- Generate and consume reports in non-HTML formats such as plain text or CSV where supported, avoiding the affected rendering path.
- Open generated HTML reports inside an isolated browser profile or sandboxed environment without access to sensitive internal resources.
- Apply web application firewall rules on the management interface to reject HTML metacharacters in fields known to feed report generation.
# Example: restrict management interface access at the network layer
iptables -A INPUT -p tcp --dport 443 -s 10.10.0.0/24 -j ACCEPT
iptables -A INPUT -p tcp --dport 443 -j DROP
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
