CVE-2021-20988

mediumpriority · track · 30EPSS 0.010 · 62 %ileDEEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.99% (62nd) EPSS

CVSS 5 · medium

Is it mine?

34 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · pepperl_fuchs_psirt

EPSS · scored 2026-10-27

In Hilscher rcX RTOS versions prios to V2.1.14.1 the actual UDP packet length is not verified against the length indicated by the packet. This may lead to a denial of service of the affected device.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

Mitigationpepperl_fuchs_psirt
An external protective measure is required. Minimize network exposure for affected products and ensure that they are not accessible via the Internet. Isolate affected products from the corporate network. If remote access is required, use secure methods such as virtual private networks (VPNs).

cvss

Technical severity, 0–10. One row per scoring source.

8.6

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–8.6

v2.05mediumAV:N/AC:L/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · ENISA EU

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · info@cert.vde.comexploitability 3.9 · impact 4

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · Pepperl+Fuchs PSIRT DE

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-119USprimaryCWE-119US

affected products (34)

Products and version ranges known to be affected.

Ethernet IO Modules ICE1-16≤ ICE1-16DI-G60L-V1D ≤F10017enisa_euvdEU
Ethernet IO Modules ICE1-16≤ ICE1-16DIO-G60L-V1D ≤F10017enisa_euvdEU
Ethernet IO Modules ICE1-16≤ ICE1-16DIO-G60L-C1-V1D ≤F10017enisa_euvdEU
Ethernet IO Modules ICE1-8≤ ICE1-8IOL-G60L-V1D ≤F10017enisa_euvdEU
Ethernet IO Modules ICE1-8≤ ICE1-8DI8DO-G60L-C1-V1D ≤F10017enisa_euvdEU
Ethernet IO Modules ICE1-8≤ ICE1-8IOL-G30L-V1D ≤F10017enisa_euvdEU
Ethernet IO Modules ICE1-8≤ ICE1-8DI8DO-G60L-V1D ≤F10017enisa_euvdEU
Ethernet IO Modules ICE1-8≤ ICE1-8IOL-S2-G60L-V1D ≤F10017enisa_euvdEU
rcX RTOSunspecified → V2.1.14.1enisa_euvdEU
hilscher rcx rtos< 2.1.14.1nvdUScpe:2.3:a:hilscher:rcx_rtos:*:*:*:*:*:*:*:*
pepperl-fuchs ice1-16di-g60l-v1d firmware≤ f10017nvdUScpe:2.3:o:pepperl-fuchs:ice1-16di-g60l-v1d_firmware:*:*:*:*:*:*:*:*
pepperl-fuchs ice1-16dio-g60l-c1-v1d firmware≤ f10017nvdUScpe:2.3:o:pepperl-fuchs:ice1-16dio-g60l-c1-v1d_firmware:*:*:*:*:*:*:*:*
pepperl-fuchs ice1-16dio-g60l-v1d firmware≤ f10017nvdUScpe:2.3:o:pepperl-fuchs:ice1-16dio-g60l-v1d_firmware:*:*:*:*:*:*:*:*
pepperl-fuchs ice1-8di8do-g60l-c1-v1d firmware≤ f10017nvdUScpe:2.3:o:pepperl-fuchs:ice1-8di8do-g60l-c1-v1d_firmware:*:*:*:*:*:*:*:*
pepperl-fuchs ice1-8di8do-g60l-v1d firmware≤ f10017nvdUScpe:2.3:o:pepperl-fuchs:ice1-8di8do-g60l-v1d_firmware:*:*:*:*:*:*:*:*
pepperl-fuchs ice1-8iol-g30l-v1d firmware≤ f10017nvdUScpe:2.3:o:pepperl-fuchs:ice1-8iol-g30l-v1d_firmware:*:*:*:*:*:*:*:*
pepperl-fuchs ice1-8iol-g60l-v1d firmware≤ f10017nvdUScpe:2.3:o:pepperl-fuchs:ice1-8iol-g60l-v1d_firmware:*:*:*:*:*:*:*:*
pepperl-fuchs ice1-8iol-s2-g60l-v1d firmware≤ f10017nvdUScpe:2.3:o:pepperl-fuchs:ice1-8iol-s2-g60l-v1d_firmware:*:*:*:*:*:*:*:*
Pepperl+Fuchs Hardware ICE1-16DI-G60L-V1D <= F10017≤ F10017pepperl_fuchs_psirtDE
Pepperl+Fuchs Hardware ICE1-16DIO-G60L-C1-V1D <= F10017≤ F10017pepperl_fuchs_psirtDE

showing 20 of 34

advisories (1)

Vendor and ecosystem advisories describing this.

VDE-2021-018Pepperl+Fuchs: Multiple vulnerabilites in ICE1 Ethernet IO Modules2021-05-12csaf · pepperl_fuchs_psirtDE
Critical vulnerability has been discovered in the utilized components rcX, mbedTLS, PROFINET IO Device and EtherNet/IP Core by Hilscher Gesellschaft für Systemautomation mbH. The impact of the vulnerabilities on the affected device is that it can result in: * Denial of Service (DoS) * Remote Code Execution (RCE) * Code Exposure **Note:** ICE1-8IOL-S2-G60L-V1D (70103603) is not affected by CVE-2021-20986

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd pepperl_fuchs_psirt NVD CVE.org MITRE

published 2021-05-13modified 2026-06-17

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+21038 more

references (6)

External citations — patches, advisories, analysis.

scry

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