How severe is CVE-2020-12511?

CVE-2020-12511 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-12511 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12511?

CVE-2020-12511 primarily affects Pepperl-fuchs Io-link Master 4-eip Firmware. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-12511?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-12511 published?

CVE-2020-12511 was published on 2021-01-22 and last updated on 2026-06-17.

CVE-2020-12511

CVE-2020-12511 is a high-severity vulnerability in Pepperl-fuchs Io-link Master 4-eip Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-352.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Pepperl-fuchs Io-link Master 4-eip Firmware
Published: 2021-01-22
Last modified: 2026-06-17

Description

Pepperl+Fuchs Comtrol IO-Link Master in Version 1.5.48 and below is prone to a Cross-Site Request Forgery (CSRF) in the web interface.

Frequently asked questions

What is CVE-2020-12511?: Pepperl+Fuchs Comtrol IO-Link Master in Version 1.5.48 and below is prone to a Cross-Site Request Forgery (CSRF) in the web interface.
How severe is CVE-2020-12511?: CVE-2020-12511 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-12511 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12511?: CVE-2020-12511 primarily affects Pepperl-fuchs Io-link Master 4-eip Firmware. In total, 12 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-12511?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-12511 published?: CVE-2020-12511 was published on 2021-01-22 and last updated on 2026-06-17.

References

https://cert.vde.com/en-us/advisories/vde-2020-038

Affected products (12)

cpe:2.3:o:pepperl-fuchs:io-link_master_4-eip_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:pepperl-fuchs:io-link_master_8-eip_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:pepperl-fuchs:io-link_master_8-eip-l_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:pepperl-fuchs:io-link_master_dr-8-eip_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:pepperl-fuchs:io-link_master_dr-8-eip-p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:pepperl-fuchs:io-link_master_dr-8-eip-t_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:pepperl-fuchs:io-link_master_4-pnio_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:pepperl-fuchs:io-link_master_8-pnio_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:pepperl-fuchs:io-link_master_8-pnio-l_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:pepperl-fuchs:io-link_master_dr-8-pnio_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:pepperl-fuchs:io-link_master_dr-8-pnio-p_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:pepperl-fuchs:io-link_master_dr-8-pnio-t_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Pepperl-fuchs Io-link Master 4-eip Firmware

CVE-2020-12513 — High (CVSS 7.5): Pepperl+Fuchs Comtrol IO-Link Master in Version 1.5.48 and below is prone to an authenticated blind OS Command…
CVE-2020-12512 — High (CVSS 7.5): Pepperl+Fuchs Comtrol IO-Link Master in Version 1.5.48 and below is prone to an authenticated reflected POST Cross-Site…
CVE-2020-12514 — Medium (CVSS 6.6): Pepperl+Fuchs Comtrol IO-Link Master in Version 1.5.48 and below is prone to a NULL Pointer Dereference that leads to a…

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