CVE-2026-7208

Summary

Yealink SIP-T33G firmware versions 124.86.x.x prior to 124.87.0.0 contain a race condition vulnerability that allows authenticated attackers to interrupt active diagnostic processes by concurrently deleting output files written to predictable paths under the diagnostic directory. Attackers can trigger a diagnostic operation such as traceroute or ping and simultaneously invoke the file deletion endpoint to terminate the running process, leaving the system in an inconsistent state.

Affected Software

Weaknesses

• CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://www.yealink.com/en/trust-center/security-bulletins/race-condition-on-runtime-diagnostic-files-in-yealink-sipt33g
• https://www.yealink.com/en/product-detail/ip-phone-t33g
• https://www.vulncheck.com/advisories/yealink-sip-t33g-race-condition-via-diagnostic-file-deletion

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