TFTP client and server copy the ERROR packet message without bounding the read against the packet
Priority LOW 36CWE-125Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- Low · None · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
In Eclipse ThreadX NetX Duo versions 6.0 through 6.5.2.202603a, the TFTP client copies the message of a received ERROR packet without bounding the copy by the end of the datagram, and the TFTP server reads one byte past a minimal ERROR packet. A malicious TFTP server can make the client copy up to 64 bytes of adjacent packet-pool memory into the error string the application retrieves, or fault on targets with memory protection.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00253 16th percentileScored 2026-11-07
Fix Fixed Eclipse ThreadX NetX Duo (Eclipse Foundation): 6.5.2.202603b
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Eclipse Foundation | Eclipse ThreadX NetX Duo | 6.0 – 6.5.2.202603a | 6.5.2.202603b | Patch available | CNA |
- Eclipse ThreadX NetX Duo VendorEclipse Foundation Affected 6.0 – 6.5.2.202603a Fixed in 6.5.2.202603b Patch available CNA
Remediation
- Fix · CNA Eclipse ThreadX NetX Duo (Eclipse Foundation) Fixed in 6.5.2.202603b
Timeline
- 2026-10-02 Threatist record created from CVE-2026-102721
- 2026-10-03 Alias added: GHSA-5cxq-44w6-64mx
- 2026-11-04 Title updated · CNA
- 2026-11-04 Fix available: Eclipse Foundation/Eclipse ThreadX NetX [email protected] · CNA
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Sources
- CVE-2026-102721 · CVE Program
- CVE-2026-102721 · NVD
- FIRST EPSS
- GHSA-5cxq-44w6-64mx · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences