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CVE-2021-20986

23
FAUCET Score

CVE-2021-20986 is a Denial of Service vulnerability affecting Hilscher PROFINET IO Device V3 versions prior to V3.14.0.7, impacting products from Hilscher and Pepperl-Fuchs. This vulnerability could lead to the disruption of cyclic or acyclic communication within industrial control systems. With a CVSS score of 7.5 (HIGH), it has a low attack complexity and requires no user interaction, allowing an unauthenticated attacker to cause a complete loss of availability. There is currently no evidence of active exploitation, nor are there publicly available exploit tools like Metasploit or Nuclei modules. The vulnerability has received minimal community discussion and media coverage, suggesting a low profile in the public domain.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.0, < 3.14.0.7CPE matchmatch criteria
cpe:2.3:o:hilscher:profinet_io_device_firmware:*:*:*:*:*:*:*:*
<= 2.0.0CPE matchmatch criteria
cpe:2.3:o:pepperl-fuchs:pgv100-f200a-b17-v1d_firmware:*:*:*:*:*:*:*:*
<= 2.0.0CPE matchmatch criteria
cpe:2.3:o:pepperl-fuchs:pgv150i-f200a-b17-v1d_firmware:*:*:*:*:*:*:*:*
<= 2.0.0CPE matchmatch criteria
cpe:2.3:o:pepperl-fuchs:pgv100-f200-b17-v1d-7477_firmware:*:*:*:*:*:*:*:*
<= 4.2.0CPE matchmatch criteria
cpe:2.3:o:pepperl-fuchs:pxv100-f200-b17-v1d_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.00%
Probability of exploitation in next 30 days
EPSS Percentile
59.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0100 is in the 35th percentile among its peer group of 51,506 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (6)

capnprotovendor investigatingvia llm_extracted
gcpvendor investigatingvia llm_extracted
hanwhavendor investigatingvia llm_extracted
kongvendor investigatingvia llm_extracted
openwrtvendor investigatingvia llm_extracted
proxmoxvendor investigatingvia llm_extracted

Vendor Advisories (6)

capnprotollm-capnproto-0cab12e23d917aedHIGH

Denial of Service in Rexroth ActiveMover using Profinet protocol

Mar 31, 2021
openwrtllm-openwrt-01b4ec5bfb3327abHIGH

Denial of Service in Rexroth ActiveMover using Profinet protocol

Mar 31, 2021
gcpllm-gcp-cc2d3ea563448930HIGH

Denial of Service in Rexroth ActiveMover using Profinet protocol

Mar 31, 2021
kongllm-kong-2b05090f27f4a91aHIGH

Denial of Service in Rexroth ActiveMover using Profinet protocol

Mar 31, 2021
hanwhallm-hanwha-d3d7250df9d30fc5HIGH

Denial of Service in Rexroth ActiveMover using Profinet protocol

Mar 31, 2021
proxmoxllm-proxmox-a07235457d13e985HIGH

Denial of Service in Rexroth ActiveMover using Profinet protocol

Mar 31, 2021

References

cert.vde.com / en-us/advisories/vde-2021-006
Third Party Advisory
kb.hilscher.com / display/ISMS/2020-12-03+Denial+of+Service+vulnerability+in+PROFINET+IO+Device
Vendor Advisory