CVE-2026-71937— DrayTek VigorSwitch Multiple Models Buffer Overflow via poe_schedule_profile
Quick assessment
Affected
DrayTek Corporation VigorSwitch G2540xs
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.
多个 DrayTek VigorSwitch 型号设备在 poe_schedule_profile 函数中存在缓冲区溢出漏洞。该漏洞是由于将 start_date（开始日期）、start_time（开始时间）、duration_time（持续时间）、how_often（频率）、weekdays（星期）、monthly_date（每月日期）和 cycle_duration（周期持续时间）等字段反复拼接至固定大小的小缓冲区中时，未进行适当的长度检查所致。远程攻击者可通过构造恶意输入触发此漏洞，从而导致拒绝服务（DoS）
Possible ATT&CK Techniques 3 AI
T1059 · Command and Scripting Interpreter T1068 · Exploitation for Privilege Escalation T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-71937
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
DrayTek VigorSwitch Multiple Models Buffer Overflow via poe_schedule_profile
Source: CVE Program / CVE List V5
Vulnerability Description
Multiple DrayTek VigorSwitch models contain a buffer overflow vulnerability in the poe_schedule_profile function. The vulnerability is caused by repeated concatenation of the start_date, start_time, duration_time, how_often, weekdays, monthly_date, and cycle_duration fields into small fixed-size buffers without proper length checks. A remote attacker can trigger this vulnerability via crafted input, causing a denial of service or potentially executing arbitrary commands. Exploitation requires valid administrative credentials for the device's web management interface.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-71937
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-71937
请登录查看更多情报信息。
Vendor Advisories for CVE-2026-71937 (2)
Same Patch Batch · DrayTek Corporation · 2026-08-24 · 40 CVEs total
| CVE-2026-71914 | 9.8 CRITICAL | DrayTek VigorAP Multiple Models Pre-Authentication OS Command Injection via dray_apm |
| CVE-2026-71921 | 9.8 CRITICAL | DrayTek VigorSwitch Multiple Models Pre-Authentication OS Command Injection via setget.cgi |
| CVE-2026-71933 | 9.1 CRITICAL | DrayTek VigorSwitch Multiple Models Missing Authorization in Syslog Functions |
| CVE-2026-71922 | 7.5 HIGH | DrayTek VigorSwitch Multiple Models Pre-Authentication NULL Pointer Dereference via setget |
| CVE-2026-71915 | 7.2 HIGH | DrayTek VigorSwitch Multiple Models OS Command Injection via jsonstatus |
| CVE-2026-71919 | 7.2 HIGH | DrayTek VigorSwitch Multiple Models OS Command Injection via sysreboot |
| CVE-2026-71910 | 7.2 HIGH | DrayTek VigorAP Multiple Models OS Command Injection via apautotest |
| CVE-2026-71906 | 7.2 HIGH | DrayTek VigorAP Multiple Models OS Command Injection via setLan |
| CVE-2026-71912 | 7.2 HIGH | DrayTek VigorAP Multiple Models Buffer Overflow via apautotest |
| CVE-2026-71917 | 7.2 HIGH | DrayTek VigorSwitch Multiple Models OS Command Injection via pingtrace |
| CVE-2026-71907 | 7.2 HIGH | DrayTek VigorAP Multiple Models OS Command Injection via setcamset |
| CVE-2026-71934 | 7.2 HIGH | DrayTek VigorSwitch Multiple Models Buffer Overflow via pingtrace |
| CVE-2026-71905 | 7.2 HIGH | DrayTek VigorAP Multiple Models OS Command Injection via ExportSettings |
| CVE-2026-71923 | 7.2 HIGH | DrayTek VigorSwitch Multiple Models OS Command Injection via auth_set |
| CVE-2026-71935 | 7.2 HIGH | DrayTek VigorSwitch Multiple Models Buffer Overflow via webBackupAction |
| CVE-2026-71941 | 7.2 HIGH | DrayTek VigorSwitch Multiple Models Buffer Overflow via diag_logmail |
| CVE-2026-71938 | 7.2 HIGH | DrayTek VigorSwitch Multiple Models Buffer Overflow via switch_lan_gvrp |
| CVE-2026-71939 | 7.2 HIGH | DrayTek VigorSwitch Multiple Models Buffer Overflow via acl_general_setup Add ACE |
| CVE-2026-71918 | 7.2 HIGH | DrayTek VigorSwitch Multiple Models OS Command Injection via webBackupAction |
| CVE-2026-71909 | 7.2 HIGH | DrayTek VigorAP Multiple Models OS Command Injection via InquierTime |
Showing top 20 of 40 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: VigorSwitch G2540xs
-
CVE-2026-71943
DrayTek VigorSwitch Multiple Models OS Command Injection via -
CVE-2026-71941
DrayTek VigorSwitch Multiple Models Buffer Overflow via diag -
CVE-2026-71942
DrayTek VigorSwitch Multiple Models Buffer Overflow via mail -
CVE-2026-71940
DrayTek VigorSwitch Multiple Models Buffer Overflow via acl_ -
CVE-2026-71938
DrayTek VigorSwitch Multiple Models Buffer Overflow via swit
Same vendor: DrayTek Corporation
-
CVE-2026-71943
DrayTek VigorSwitch Multiple Models OS Command Injection via -
CVE-2026-71941
DrayTek VigorSwitch Multiple Models Buffer Overflow via diag -
CVE-2026-71942
DrayTek VigorSwitch Multiple Models Buffer Overflow via mail -
CVE-2026-71940
DrayTek VigorSwitch Multiple Models Buffer Overflow via acl_ -
CVE-2026-71938
DrayTek VigorSwitch Multiple Models Buffer Overflow via swit
Same weakness: CWE-120
-
CVE-2026-78322
File-roller: file-roller: stack buffer overflow in parse_pro -
CVE-2026-19568
SVG File Parsing Memory Corruption Vulnerability in Autodesk -
CVE-2026-71942
DrayTek VigorSwitch Multiple Models Buffer Overflow via mail -
CVE-2026-71941
DrayTek VigorSwitch Multiple Models Buffer Overflow via diag -
CVE-2026-71940
DrayTek VigorSwitch Multiple Models Buffer Overflow via acl_
V. Comments for CVE-2026-71937
No comments yet