CVE-2026-102761NetX 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.
Updated under an hour ago ()
Does this affect you?
It affects Eclipse Foundation NetX Duo. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.25%, higher than 15% of scored CVEs.
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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.
- CVSS
- 9.3 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.25% (percentile 15)
- Assigned by
- eclipse
- NVD analysis
- Awaiting Analysis
- Record last updated
- Sep 30, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Eclipse Foundation NetX Duo eclipse_foundation:netx_duo (from the name) | from 6.2.0 through 6.5.1.202602; 6.5.2.202603 not affected | CNA record |
References
- https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-6xgx-v7gw-qjph
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.