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CVE-2026-7208— Yealink SIP-T33G < 124.87.0.0 Race Condition via Diagnostic File Deletion

Quick assessment

Affected

Yealink SIP-T33G

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Yealink SIP-T33G是中国Yealink公司的一款支持SIP协议的企业级IP电话。 Yealink SIP-T33G 124.87.0.0版本之前的124.86版本存在竞争条件问题漏洞，该漏洞源于存在竞争条件，经过身份验证的攻击者可通过并发删除诊断目录下可预测路径的输出文件，并同时触发traceroute或ping等诊断操作及调用文件删除端点，中断正在运行的诊断进程，导致系统状态不一致。

CVSS 5.3 · Medium EPSS 0.35% · P28 Updated Sep 15, 2026

Possible ATT&CK Techniques 2 AI

T1071.003 · Mail Protocols T1531 · Account Access Removal

Affected Version Matrix 1

Vendor	Product	Version Range	Status
Yealink	SIP-T33G	`124.86.0.0< 124.87.0.0`	affected

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I. Basic Information for CVE-2026-7208

Vulnerability Information

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Vulnerability Title

Yealink SIP-T33G < 124.87.0.0 Race Condition via Diagnostic File Deletion

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

使用共享资源的并发执行不恰当同步问题(竞争条件)

Source: CVE Program / CVE List V5

Vulnerability Title

Yealink SIP-T33G 竞争条件问题漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
Yealink	SIP-T33G	124.86.0.0 ~ 124.87.0.0	-

II. Public POCs for CVE-2026-7208

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-7208

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Vendor Advisories for CVE-2026-7208 (1)

🔗 Yealink SIP-T33G < 124.87.0.0 Race Condition via Diagnostic File Deletion | Advisories | VulnCheck third-party-advisory

Vendor Pages for CVE-2026-7208 (2)

🔗 Race Condition on Runtime Diagnostic Files in Yealink SIP‑T33G vendor-advisory patch
🔗 SIP-T33G - Classic Business IP Phone | Yealink product

https://www.cve.org/CVERecord?id=CVE-2026-7208

IV. Related Vulnerabilities

Same vendor: Yealink

Same weakness: CWE-362