Cyber Resilience

CVE-2021-20987

High

Published: 16 February 2021

Published
16 February 2021
Modified
21 November 2024
KEV Added
—
Patch
—
CVSS Score v3.1 8.6 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS Score 0.0037 59.1th percentile
Risk Priority 17 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-20987 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Hilscher Ethernet\/Ip Adapter Firmware. Its CVSS base score is 8.6 (High).

Operationally, ranked in the top 40.9% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

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.

CWE(s)
CWE-787

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

hilscher
ethernet\/ip adapter firmware
2.0 — 2.13.0.21
pepperl-fuchs
wcs firmware
≤ 1.2.1
pepperl-fuchs
pxv100-f200-b25-v1d firmware
≤ 1.10.0
pepperl-fuchs
pxv100i-f200-b25-v1d firmware
≤ 1.10.0
pepperl-fuchs
pcv100-f200-b25-v1d-6011-6720 firmware
≤ 1.10.0
pepperl-fuchs
pcv50-f200-b25-v1d firmware
≤ 1.10.0
pepperl-fuchs
pcv80-f200-b25-v1d firmware
≤ 1.10.0
pepperl-fuchs
pcv100-f200-b25-v1d-6011 firmware
≤ 1.10.0

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

SI-16 Memory Protection
addresses: CWE-787

Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.

References