What is the CVSS score of CVE-2021-21004?

CVE-2021-21004 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.6%.

Fl Switch Smcs 16Tx Firmware CVE-2021-21004

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2021-06-25 info@cert.vde.com

XSS Fl Switch Smcs 16Tx Firmware Fl Switch Smcs 14Tx 2Fx Firmware Fl Switch Smcs 14Tx 2Fx Sm Firmware Fl Switch Smcs 8Gt Firmware Fl Switch Smcs 6Gt 2Sfp Firmware Fl Switch Smcs 8Tx Pn Firmware Fl Switch Smcs 4Tx Pn Firmware Fl Switch Smcs 8Tx Firmware Fl Switch Smcs 6Tx 2Sfp Firmware Fl Switch Smn 6Tx 2Pof Pn Firmware Fl Switch Smn 8Tx Pn Firmware Fl Switch Smn 6Tx 2Fx Firmware Fl Switch Smn 6Tx 2Fx Sm Firmware Fl Nat Smn 8Tx Firmware Fl Nat Smn 8Tx M Firmware

6.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

CVE Published

Jun 25, 2021 - 19:15 nvd

MEDIUM 6.1

DescriptionNVD

In Phoenix Contact FL SWITCH SMCS series products in multiple versions an attacker may insert malicious code via LLDP frames into the web-based management which could then be executed by the client.

AnalysisAI

In Phoenix Contact FL SWITCH SMCS series products in multiple versions an attacker may insert malicious code via LLDP frames into the web-based management which could then be executed by the client. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Cross-Site Scripting (XSS) (CWE-79), which allows attackers to inject malicious scripts into web pages viewed by other users. In Phoenix Contact FL SWITCH SMCS series products in multiple versions an attacker may insert malicious code via LLDP frames into the web-based management which could then be executed by the client. Affected products include: Phoenixcontact Fl Switch Smcs 16Tx Firmware, Phoenixcontact Fl Switch Smcs 14Tx\/2Fx Firmware, Phoenixcontact Fl Switch Smcs 14Tx\/2Fx-Sm Firmware, Phoenixcontact Fl Switch Smcs 8Gt Firmware, Phoenixcontact Fl Switch Smcs 6Gt\/2Sfp Firmware.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Sanitize all user input, use Content-Security-Policy headers, encode output contextually (HTML, JS, URL). Use frameworks with built-in XSS protection.