Vulnerability Monitor

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CVE-2021-33540


In certain devices of the Phoenix Contact AXL F BK and IL BK product families an undocumented password protected FTP access to the root directory exists.


Security Impact Summary

This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.3, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts limited data confidentiality, limited integrity, and limited availability for affected systems. Impacting 36 products from phoenixcontact, from phoenixcontact, from phoenixcontact and 33 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.


Published

2021-06-25T19:15:09.697

Last Modified

2024-11-21T06:09:02.727

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.3 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

  • Access Vector: NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: PARTIAL
  • Availability Impact: PARTIAL
Exploitability Score

10.0

Impact Score

6.4

Weaknesses
  • Type: Secondary
    CWE-798

Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System phoenixcontact axl_f_bk_pn_tps_xc_firmware < 1.30 Yes
Hardware phoenixcontact axl_f_bk_pn_tps_xc - No
Operating System phoenixcontact axl_f_bk_pn_tps_firmware < 1.30 Yes
Hardware phoenixcontact axl_f_bk_pn_tps - No
Operating System phoenixcontact axl_f_bk_eip_firmware < 1.30 Yes
Hardware phoenixcontact axl_f_bk_eip - No
Operating System phoenixcontact axl_f_bk_eip_ef_firmware < 1.30 Yes
Hardware phoenixcontact axl_f_bk_eip_ef - No
Operating System phoenixcontact axl_f_bk_eth_firmware < 1.30 Yes
Hardware phoenixcontact axl_f_bk_eth - No
Operating System phoenixcontact axl_f_bk_eth_xc_firmware < 1.30 Yes
Hardware phoenixcontact axl_f_bk_eth_xc - No
Operating System phoenixcontact axl_f_bk_s35_firmware < 1.40 Yes
Hardware phoenixcontact axl_f_bk_s35 - No
Operating System phoenixcontact axl_f_bk_pn_firmware * Yes
Hardware phoenixcontact axl_f_bk_pn - No
Operating System phoenixcontact axl_f_bk_pn_xc_firmware * Yes
Hardware phoenixcontact axl_f_bk_pn_xc - No
Operating System phoenixcontact axl_f_bk_eth_net2_firmware * Yes
Hardware phoenixcontact axl_f_bk_eth_net2 - No
Operating System phoenixcontact axl_f_bk_sas_firmware * Yes
Hardware phoenixcontact axl_f_bk_sas - No
Operating System phoenixcontact il_pn_bk-pac_firmware * Yes
Hardware phoenixcontact il_pn_bk-pac - No
Operating System phoenixcontact il_pn_bk_di8_do4_2tx-pac_firmware * Yes
Hardware phoenixcontact il_pn_bk_di8_do4_2tx-pac - No
Operating System phoenixcontact il_pn_bk_di8_do4_2scrj-pac_firmware * Yes
Hardware phoenixcontact il_pn_bk_di8_do4_2scrj-pac - No
Operating System phoenixcontact il_eth_bk_di8_do4_2tx-xc-pac_firmware * Yes
Hardware phoenixcontact il_eth_bk_di8_do4_2tx-xc-pac - No
Operating System phoenixcontact il_eth_bk_di8_do4_2tx-pac_firmware * Yes
Hardware phoenixcontact il_eth_bk_di8_do4_2tx-pac - No
Operating System phoenixcontact il_eip_bk_di8_do4_2tx-pac_firmware * Yes
Hardware phoenixcontact il_eip_bk_di8_do4_2tx-pac - No
Operating System phoenixcontact il_s3_bk_di8_do4_2tx-pac_firmware * Yes
Hardware phoenixcontact il_s3_bk_di8_do4_2tx-pac - No

References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For phoenixcontact's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.