CVE-2026-7208
Yealink SIP-T33G < 124.87.0.0 Race Condition via Diagnostic File Deletion
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-362 |
| Vendor | yealink |
| Product | sip-t33g |
| Published | Sep 14, 2026 |
| Last Updated | Sep 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Yealink / SIP-T33G
124.86.0.0 < 124.87.0.0
References
yealink.com: https://www.yealink.com/en/trust-center/security-bulletins/race-condition-on-runtime-diagnostic-files-in-yealink-sipt33g yealink.com: https://www.yealink.com/en/product-detail/ip-phone-t33g vulncheck.com: https://www.vulncheck.com/advisories/yealink-sip-t33g-race-condition-via-diagnostic-file-deletion
Credits
Jean-Marie Bourbon of Bourbon Offensive Security Services VulnCheck