Security readout for executives and security teams
This is an availability issue in legacy Grandstream GXP-2000 VoIP phones. A remote party can make affected phones hang or reboot by sending excessive ASCII data to specific UDP services. The business impact is call disruption, not confirmed data theft or system takeover. Exposure is most likely where old GXP-2000 phones remain deployed and reachable from untrusted networks, guest networks, or the internet. Voice VLAN segmentation reduces risk. Modern firmware status and unsupported-device status are not established by the provided sources. Treat this as a legacy VoIP availability risk. Prioritize if affected phones support business-critical calling or emergency workflows, especially if reachable beyond a trusted voice network. It is not presented as a data breach or code-execution issue in the provided evidence. Mitigation focus: Inventory Grandstream GXP-2000 phones and confirm firmware versions.; Check Grandstream guidance and release notes for supported firmware or replacement direction.; Restrict listed UDP services to trusted voice infrastructure only..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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CVE-2006-5231 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
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CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- grandstream-udp-dos(29356)CVE reference · vdb-entry, x_refsource_XF
Products and packages named in the record
CWE details
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