CVE-2021-33535— WEIDMUELLER: WLAN devices affected by exploitable format string vulnerability
Quick assessment
Affected
Weidmüller IE-WL(T)-BL-AP-CL-XX
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.
Weidmueller Industrial WLAN devices是德国Weidmueller公司的一个工控WIAN。 Weidmueller Industrial WLAN 存在格式化字符串错误漏洞，该漏洞源于特制的时间服务器条目可能会导致时间服务器缓冲区溢出，从而导致远程代码执行。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-33535
Vulnerability Information
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Vulnerability Title
WEIDMUELLER: WLAN devices affected by exploitable format string vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
In Weidmueller Industrial WLAN devices in multiple versions an exploitable format string vulnerability exists in the iw_console conio_writestr functionality. A specially crafted time server entry can cause an overflow of the time server buffer, resulting in remote code execution. An attacker can send commands while authenticated as a low privilege user to trigger this vulnerability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用外部控制的格式字符串
Source: CVE Program / CVE List V5
Vulnerability Title
Weidmueller Industrial WLAN 格式化字符串错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Weidmueller Industrial WLAN devices是德国Weidmueller公司的一个工控WIAN。 Weidmueller Industrial WLAN 存在格式化字符串错误漏洞，该漏洞源于特制的时间服务器条目可能会导致时间服务器缓冲区溢出，从而导致远程代码执行。
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 |
|---|---|---|---|---|
| Weidmüller | IE-WL(T)-BL-AP-CL-XX | IE-WL-BL-AP-CL-EU (2536600000) ~ V1.16.18 (Build 18081617) | - |
|
| Weidmüller | IE-WL(T)-VL-AP-CL-XX | IE-WL-VL-AP-BR-CL-EU (2536680000) ~ V1.11.10 (Build 18122616) | - |
|
II. Public POCs for CVE-2021-33535
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2021-33535 (1)
-
https://cert.vde.com/en-us/advisories/vde-2021-026 x_refsource_CONFIRM
Same Patch Batch · Weidmüller · 2021-06-25 · 12 CVEs total
| CVE-2021-33528 | 8.8 HIGH | WEIDMUELLER: WLAN devices affected by privilege escalation vulnerability |
| CVE-2021-33530 | 8.8 HIGH | WEIDMUELLER: WLAN devices affected by OS Command Injection vulnerability |
| CVE-2021-33531 | 8.8 HIGH | WEIDMUELLER: WLAN devices affected by Hard-coded Credentials vulnerability |
| CVE-2021-33532 | 8.8 HIGH | WEIDMUELLER: WLAN devices affected by OS Command Injection vulnerability |
| CVE-2021-33533 | 8.8 HIGH | WEIDMUELLER: WLAN devices affected by OS Command Injection vulnerability |
| CVE-2021-33537 | 8.8 HIGH | WEIDMUELLER: WLAN devices affected by Remote Code Execution (RCE) vulnerability |
| CVE-2021-33538 | 8.8 HIGH | WEIDMUELLER: WLAN devices affected by improper access control vulnerability |
| CVE-2021-33529 | 7.5 HIGH | WEIDMUELLER: WLAN devices affected by Hard-coded Credentials vulnerability |
| CVE-2021-33536 | 7.5 HIGH | WEIDMUELLER: WLAN devices affected by Denial-of-Service vulnerability |
| CVE-2021-33534 | 7.2 HIGH | WEIDMUELLER: WLAN devices affected by OS Command Injection vulnerability |
| CVE-2021-33539 | 7.2 HIGH | WEIDMUELLER: WLAN devices affected by authentication bypass vulnerability |
IV. Related Vulnerabilities
Same product: IE-WL(T)-BL-AP-CL-XX
-
CVE-2021-33539
WEIDMUELLER: WLAN devices affected by authentication bypass -
CVE-2021-33538
WEIDMUELLER: WLAN devices affected by improper access contro -
CVE-2021-33537
WEIDMUELLER: WLAN devices affected by Remote Code Execution -
CVE-2021-33536
WEIDMUELLER: WLAN devices affected by Denial-of-Service vuln -
CVE-2021-33534
WEIDMUELLER: WLAN devices affected by OS Command Injection v
Same vendor: Weidmüller
-
CVE-2021-33539
WEIDMUELLER: WLAN devices affected by authentication bypass -
CVE-2021-33538
WEIDMUELLER: WLAN devices affected by improper access contro -
CVE-2021-33537
WEIDMUELLER: WLAN devices affected by Remote Code Execution -
CVE-2021-33536
WEIDMUELLER: WLAN devices affected by Denial-of-Service vuln -
CVE-2021-33534
WEIDMUELLER: WLAN devices affected by OS Command Injection v
Same weakness: CWE-134
-
CVE-2026-17136
Vulnerabilities in IBM AIX and PowerVM VIOS -
CVE-2026-68553
Coturn: Format String Injection via TURN USERNAME/REALM into -
CVE-2026-15961
Power System Information Disclosure -
CVE-2026-12004
Security vulnerabilities have been found in IBM Verify Ident -
CVE-2026-67244
A format string vulnerability was found in the Notification
V. Comments for CVE-2021-33535
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