NetX Duo's WebSocket client resets the unmasking cursor to the first `NX_PACKET` each time it advances through a chained packet, while the loop's upper bound belongs to the current packet. With the standard contiguous packet-pool layout, a masked server frame split across two packets therefore drives the XOR loop through the first packet's unused payload area and on through the second packet's `NX_PACKET` control block.
The four-byte WebSocket masking key controls the bytes written, so the corruption is attacker-chosen rather than incidental.
Metrics
Affected Vendors & Products
References
History
Wed, 30 Sep 2026 21:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Wed, 30 Sep 2026 21:00:00 +0000
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| First Time appeared |
Eclipse
Eclipse netx Duo |
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| Vendors & Products |
Eclipse
Eclipse netx Duo |
Wed, 30 Sep 2026 00:30:00 +0000
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| Title | NetX Duo WebSocket Client Buffer Overwrite via Masking Key |
Tue, 29 Sep 2026 17:45:00 +0000
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| Description | NetX Duo's WebSocket client resets the unmasking cursor to the first `NX_PACKET` each time it advances through a chained packet, while the loop's upper bound belongs to the current packet. With the standard contiguous packet-pool layout, a masked server frame split across two packets therefore drives the XOR loop through the first packet's unused payload area and on through the second packet's `NX_PACKET` control block. The four-byte WebSocket masking key controls the bytes written, so the corruption is attacker-chosen rather than incidental. | |
| Weaknesses | CWE-787 | |
| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: eclipse
Published: 2026-09-29T17:30:45.499Z
Updated: 2026-09-30T20:41:01.935Z
Reserved: 2026-09-29T16:22:00.376Z
Link: CVE-2026-102761
Updated: 2026-09-30T20:40:57.457Z
Status : Awaiting Analysis
Published: 2026-09-29T18:17:13.450
Modified: 2026-09-30T21:17:05.550
Link: CVE-2026-102761
No data.