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CVE-2020-25159

30
FAUCET Score

CVE-2020-25159 is a critical stack-based buffer overflow vulnerability affecting the 499ES EtherNet/IP (ENIP) Adaptor Source Code from rtautomation. An unauthenticated attacker can exploit this remotely by sending a specially crafted packet, potentially leading to a denial-of-service or arbitrary code execution. With a CVSS score of 9.8, this vulnerability is highly severe due to its network-based attack vector and high impact on confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the potential for severe impact warrants attention.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.28CPE matchmatch criteria
cpe:2.3:o:rtautomation:499es_ethernet\/ip_adaptor_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.90%
Probability of exploitation in next 30 days
EPSS Percentile
85.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0290 is in the 76th percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 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-1b9a1b24e8d93b7cCRITICAL

Denial of Service in Rexroth ID 200/C-ETH using EtherNet/IP Protocol

Jan 27, 2021
openwrtllm-openwrt-1f2e2214e6362aa1CRITICAL

Denial of Service in Rexroth ID 200/C-ETH using EtherNet/IP Protocol

Jan 27, 2021
gcpllm-gcp-57c3a30780030974CRITICAL

Denial of Service in Rexroth ID 200/C-ETH using EtherNet/IP Protocol

Jan 27, 2021
kongllm-kong-fbe2a9650f84c8acCRITICAL

Denial of Service in Rexroth ID 200/C-ETH using EtherNet/IP Protocol

Jan 27, 2021
hanwhallm-hanwha-ca7acb01ac63849eCRITICAL

Denial of Service in Rexroth ID 200/C-ETH using EtherNet/IP Protocol

Jan 27, 2021
proxmoxllm-proxmox-16e99385d408dcfaCRITICAL

Denial of Service in Rexroth ID 200/C-ETH using EtherNet/IP Protocol

Jan 27, 2021

References

us-cert.cisa.gov / ics/advisories/icsa-20-324-03
Third Party AdvisoryUS Government Resource