CVE-2021-33540
Phoenix Contact: Undocumented FTP acces in certain AXL F BK and IL BK devices
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- Low
- Integrity
- Low
- Availability
- Low
Exploit likelihood
What each source reports
CVE List Score used
Phoenix Contact: Undocumented FTP acces in certain AXL F BK and IL BK devices
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.
- Record
CVE-2021-33540- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Weakness
- CWE-798
- Updated
- 2026-11-02
EUVDEUVD-2021-20232
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.
- Record
EUVD-2021-20232- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-vgp3-9m7m-h7cr No score
In certain devices of the Phoenix Contact AXL F BK and IL BK product families an undocumented...
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.
- Record
GHSA-vgp3-9m7m-h7cr- Weakness
- CWE-798
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2021-33540- CVSS 3.1
- 7.3 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-798
- Updated
- 2026-11-02
Affected products
- phoenix contact axl f bk
- phoenix contact il
- phoenixcontact axl f bk eip ef firmware
- phoenixcontact axl f bk eip firmware
- phoenixcontact axl f bk eth firmware
- phoenixcontact axl f bk eth net2 firmware
- phoenixcontact axl f bk eth xc firmware
- phoenixcontact axl f bk pn firmware
- phoenixcontact axl f bk pn tps firmware
- phoenixcontact axl f bk pn tps xc firmware
- phoenixcontact axl f bk pn xc firmware
- phoenixcontact axl f bk s35 firmware
Show 8 moreShow less
- phoenixcontact axl f bk sas firmware
- phoenixcontact il eip bk di8 do4 2tx-pac firmware
- phoenixcontact il eth bk di8 do4 2tx-pac firmware
- phoenixcontact il eth bk di8 do4 2tx-xc-pac firmware
- phoenixcontact il pn bk-pac firmware
- phoenixcontact il pn bk di8 do4 2scrj-pac firmware
- phoenixcontact il pn bk di8 do4 2tx-pac firmware
- phoenixcontact il s3 bk di8 do4 2tx-pac firmware
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-33540 is a high vulnerability (CVSS 7.3) in Phoenix Contact Axl F Bk, published June 25, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.72%, the 54th percentile. No source names a fixed version.