CVE-2021-21002— Denial of Service in Phoenix Contact FL COMSERVER UNI products
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2021-21002
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View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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
Denial of Service in Phoenix Contact FL COMSERVER UNI products
Source: NVD (National Vulnerability Database)
Vulnerability Description
In Phoenix Contact FL COMSERVER UNI in versions < 2.40 a invalid Modbus exception response can lead to a temporary denial of service.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对已超过有效生命周期的资源丧失索引
Source: NVD (National Vulnerability Database)
Vulnerability Title
Phoenix Contact FL COMSERVER UNI 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Phoenix Contact FL COMSERVER UNI是德国Phoenix Contac（Phoenix Contact）公司的一个接口转换器。用于将串行 232/422/485 接口转换为以太网的串行设备服务器 Phoenix Contact FL COMSERVER UNI 存在安全漏洞，该漏洞源于在Phoenix Contact FL COMSERVER UNI版本< 2.40中，一个无效的Modbus异常响应可能会导致暂时拒绝服务。
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 |
|---|---|---|---|---|
| Phoenix Contact | FL COMSERVER | UNI 232/422/485 (2313452) ~ 2.40 | - |
II. Public POCs for CVE-2021-21002
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2021-21002
请登录查看更多情报信息。
- https://cert.vde.com/en-us/advisories/vde-2021-022x_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2021-21002
Same Patch Batch · Phoenix Contact · 2021-06-25 · 7 CVEs total
| CVE-2021-33542 | 7.8 HIGH | Phoenix Contact: Automation Worx Software Suite affected by Remote Code Execution (RCE) vu |
| CVE-2021-21005 | 7.5 HIGH | Race Condition Vulnerability in Phoenix Contact FL SWITCH SMCS series products |
| CVE-2021-33541 | 7.5 HIGH | Phoenix Contact: ILC1x Industrial controllers affected by Denial-of-Service vulnerability |
| CVE-2021-21004 | 7.4 HIGH | Cross-site Scripting Vulnerability in Phoenix Contact FL SWITCH SMCS series products |
| CVE-2021-33540 | 7.3 HIGH | Phoenix Contact: Undocumented FTP acces in certain AXL F BK and IL BK devices |
| CVE-2021-21003 | 5.3 MEDIUM | Denial of Service Vulnerability in Phoenix Contact FL SWITCH SMCS series products |
IV. Related Vulnerabilities
Same vendor: Phoenix Contact
- CVE-2024-43384
Phoenix Contact: Improper removal of sensitive information i - CVE-2026-22323
Cross‑Site Request Forgery in Link Aggregation Configuration - CVE-2026-22322
Stored Cross‑Site Scripting in Link Aggregation Name Handlin - CVE-2026-22321
Stack-Based Buffer Overflow in CLI Login Username Handling o - CVE-2026-22320
Stack-Based Buffer Overflow in TFTP File-Transfer Command Ha
Same weakness: CWE-772
- CVE-2026-3104
Memory leak in code preparing DNSSEC proofs of non-existence - CVE-2026-2261
blocklistd(8) socket leak - CVE-2026-20082
Cisco Secure Firewall Adaptive Security Appliance 安全漏洞 - CVE-2026-2359
Multer vulnerable to Denial of Service via resource exhausti - CVE-2025-14969
Hibernate-reactive-core: hibernate reactive: denial of servi
V. Comments for CVE-2021-21002
No comments yet