CVE-2026-92929 Overview
CVE-2026-92929 affects OpenEye Apex Network Video Recorder (NVR) firmware version 3.2.9.376. The device trusts a client-supplied X-Forwarded-For HTTP header when determining the source IP address of an incoming request. An unauthenticated remote attacker can spoof a loopback address such as 127.0.0.1 to bypass local-connection-only security controls on the non-TLS web interfaces. Successful exploitation discloses configuration information intended for local administrators. The flawed design has existed since at least firmware 2.2.3.4, expanding the exposure window across many deployed units. The issue is categorized as authentication bypass by spoofing under [CWE-290].
Critical Impact
Unauthenticated remote attackers can spoof loopback addresses via the X-Forwarded-For header to bypass local-only access controls and retrieve NVR configuration data.
Affected Products
- OpenEye Apex NVR firmware 3.2.9.376
- OpenEye Apex NVR firmware versions from 2.2.3.4 through releases prior to 3.5.4
- OpenEye Apex NVR non-TLS web management interface
Discovery Timeline
- 2026-09-23 - CVE-2026-92929 published to NVD
- 2026-09-23 - Last updated in NVD database
Technical Details for CVE-2026-92929
Vulnerability Analysis
The OpenEye Apex NVR web stack extracts the client source address from the X-Forwarded-For HTTP request header instead of relying solely on the transport-layer peer address. Certain administrative endpoints on the non-TLS web interface enforce a policy that restricts access to loopback connections. That policy check consumes the header-derived address, allowing any remote client to assert 127.0.0.1 and satisfy the local-only requirement.
Because the interface does not require authentication for these local-only endpoints, an attacker only needs network reachability to the NVR and knowledge of the header trick. The result is unauthenticated disclosure of configuration information that supports further reconnaissance against the video surveillance environment.
Root Cause
The root cause is misplaced trust in a client-controlled HTTP header for security decisions. The X-Forwarded-For header is intended to convey proxy chain information and can be set to any value by an arbitrary client. Using it as the authoritative source IP for access control constitutes authentication bypass by spoofing per [CWE-290].
Attack Vector
The attack vector is network-based and requires no privileges or user interaction. An attacker sends an HTTP request directly to the NVR web interface and injects an X-Forwarded-For: 127.0.0.1 header. The server treats the request as if it originated on the loopback interface and returns responses from endpoints otherwise reserved for local administration.
No verified public exploit code is currently listed for CVE-2026-92929. See the OpenEye Issue Alert #1059 and the Securifera Security Advisory for reference details.
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Stop Identity AttacksDetection Methods for CVE-2026-92929
Indicators of Compromise
- HTTP requests to the OpenEye Apex NVR web interface containing an X-Forwarded-For header set to 127.0.0.1, ::1, or other loopback values from external sources.
- Access log entries showing successful responses on local-only administrative endpoints from non-loopback peer addresses.
- Unusual configuration read requests originating from IP ranges outside the surveillance management network.
Detection Strategies
- Inspect web proxy and NVR access logs for mismatches between the TCP peer address and the X-Forwarded-For value on requests targeting the OpenEye Apex management interface.
- Alert when any request to the NVR contains an X-Forwarded-For header referencing a loopback address, since the appliance is not deployed behind a legitimate reverse proxy in most environments.
- Baseline expected client subnets for the NVR interface and flag deviations, particularly on the non-TLS port.
Monitoring Recommendations
- Forward NVR web access logs to a centralized SIEM or data lake and retain them for at least 90 days to support retrospective investigation.
- Monitor firmware version reporting across the fleet to identify units still running 3.2.9.376 or earlier releases.
- Track outbound network flows from the NVR that could indicate follow-on activity after configuration disclosure.
How to Mitigate CVE-2026-92929
Immediate Actions Required
- Upgrade all OpenEye Apex NVR devices to firmware version 3.5.4 or later as directed in OpenEye Issue Alert #1059.
- Restrict network access to the NVR web interface using firewall rules that permit only authorized management workstations.
- Disable or block the non-TLS web interface where the vendor supports HTTPS-only operation.
Patch Information
OpenEye addresses CVE-2026-92929 in firmware version 3.5.4. Administrators should apply the update through the vendor's standard firmware upgrade procedure. Refer to OpenEye Issue Alert #1059 for release notes and upgrade guidance, and to the Securifera Security Advisory for background on the underlying weakness.
Workarounds
- Place the NVR behind a reverse proxy or firewall that strips or overwrites inbound X-Forwarded-For headers before requests reach the appliance.
- Segment surveillance devices onto a dedicated VLAN with strict ingress filtering from user networks.
- Limit management access to a jump host on the loopback-adjacent network path until firmware 3.5.4 is deployed.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
