Vulnerability in Yealink Sip-T33g
CVE-2026-7208
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.
Vulnerability class: Race Condition
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.003 (28.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
Weakness classification (CWE)
References
- www.yealink.com/en/trust-center/security-bulletins/race-condition-on-runtime-di… (vendor-advisory, patch)
- www.yealink.com/en/product-detail/ip-phone-t33g (product)
- www.vulncheck.com/advisories/yealink-sip-t33g-race-condition-via-diagnostic-fil… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-7208?
- CVE-2026-7208 is a medium-severity vulnerability in Yealink Sip-T33g, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 5.3/10. Published 2026-09-14.
- How severe is CVE-2026-7208?
- Medium severity. CVSS v3 base score is 5.3 out of 10.