CVE-2021-20987
Hilscher: EtherNet/IP stack crash for specific CIP service
HIGH
8.6
CVSS Score
Published: February 16, 2021 at 04:37 PM UTC
Updated: June 17, 2026 at 03:34 AM UTC
27 products affected across 3 vendorsWcs FirmwareEthernet /ip Adapter FirmwarePcv100-f200-b25-v1d 6011-6720 Firmware
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Severity
HIGH8.6
Exploit prediction
EPSS 1%
Description
A denial of service and memory corruption vulnerability was found in Hilscher EtherNet/IP Core V2 prior to V2.13.0.21that may lead to code injection through network or make devices crash without recovery.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
2.0 ≤ v < 2.13.0.21
Affected range stops below 2.13.0.21, so it looks safe — our inference, not a vendor statement
hilscher-ethernet-ip-adapter (same device)
v ≤ 1.10.0
pepperl-fuchs-pcv100-f200-b25-v1d-6011-6720 (same device)
v ≤ 1.10.0
pepperl-fuchs-pcv100-f200-b25-v1d-6011 (same device)
v ≤ 1.10.0
pepperl-fuchs-pcv50-f200-b25-v1d (same device)
v ≤ 1.10.0
pepperl-fuchs-pcv80-f200-b25-v1d (same device)
v ≤ 1.10.0
pepperl-fuchs-pxv100-f200-b25-v1d (same device)
v ≤ 1.10.0
pepperl-fuchs-pxv100i-f200-b25-v1d (same device)
v ≤ 1.2.1
pepperl-fuchs-wcs3b-ls510 (same device) · pepperl-fuchs-wcs3b-ls510-om (same device) · pepperl-fuchs-wcs3b-ls510d (same device) · pepperl-fuchs-wcs3b-ls510d-om (same device) · pepperl-fuchs-wcs3b-ls510dh (same device) · pepperl-fuchs-wcs3b-ls510dh-om (same device) · pepperl-fuchs-wcs3b-ls510h (same device) · pepperl-fuchs-wcs3b-ls510h-om (same device)
V2 ≤ v < V2.13.0.212
Affected range stops below V2.13.0.21, so it looks safe — our inference, not a vendor statement
PXV100-F200-B25-V1D, PXV100I-F200-B25-V1D, PCV100-F200-B25-V1D-6011-6720, PCV50-F200-B25-V1D, PCV80-F200-B25-V1D, PCV100-F200-B25-V1D-6011 ≤ v ≤ V1.10.0PXV100-F200-B25-V1D, PXV100I-F200-B25-V1D, PCV100-F200-B25-V1D-6011-6720, PCV50-F200-B25-V1D, PCV80-F200-B25-V1D, PCV100-F200-B25-V1D-6011
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (2)
x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://cert.vde.com/en-us/advisories/vde-2021-007x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://kb.hilscher.com/pages/viewpage.action?pageId=108969480CVSS
8.6HIGHCERTVDE
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-787
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