Vulnerability · CVE-2025-53476
A denial of service vulnerability exists in the ModbusTCP server functionality of OpenPLC _v3 a931181e8b81e36fadf7b74d5cba99b73c3f6d58.
Published Oct 7, 2025 · catalog updated Nov 3, 2025 · OpenPLC OpenPLC_v3
Last checked Oct 23, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2025-53476. EPSS is 0.46%. Act only if a listed version of OpenPLC OpenPLC_v3 is installed.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2025-54811 · Medium
- CVE-2025-54962 · Medium
- Severity
- Medium5.3
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.46%
- Remediation
- Vendor / distro source
- Affected products
- vendor OpenPLC OpenPLC_v3 a931181e8b81e36fadf7b74d5cba99b73c3f6d58
A denial of service vulnerability exists in the ModbusTCP server functionality of OpenPLC _v3 a931181e8b81e36fadf7b74d5cba99b73c3f6d58. A specially crafted series of network connections can lead to the server not processing subsequent Modbus requests. An attacker can open a series of TCP connections to trigger this vulnerability.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor OpenPLC OpenPLC_v3 a931181e8b81e36fadf7b74d5cba99b73c3f6d58a931181e8b81e36fadf7b74d5cba99b73c3f6d58
How to fix CVE-2025-53476
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
No version range is stored, so an installed version cannot be checked on this page.
Advisory
Open the cve_org record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2025-53476. EPSS is 0.46%. Act only if a listed version of OpenPLC OpenPLC_v3 is installed.
Which versions are affected?
Compare what you have installed with OpenPLC OpenPLC_v3 a931181e8b81e36fadf7b74d5cba99b73c3f6d58 a931181e8b81e36fadf7b74d5cba99b73c3f6d58. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
No weakness class is stored. EPSS 0.46%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Oct 7, 2025 · EUVD
Detected
A denial of service vulnerability exists in the ModbusTCP server functionality of OpenPLC _v3 a931181e8b81e36fadf7b74d5cba99b73c3f6d58. A specially crafted series of network connections can lead to the server not processing subsequent Modbus requests. An attacker can open a series of TCP connections to trigger this vulnerability.
Nov 3, 2025 · EUVD
Updated
A denial of service vulnerability exists in the ModbusTCP server functionality of OpenPLC _v3 a931181e8b81e36fadf7b74d5cba99b73c3f6d58. A specially crafted series of network connections can lead to the server not processing subsequent Modbus requests. An attacker can open a series of TCP connections to trigger this vulnerability.
Sources
- CVE.orgVulnerability recordCVE-2025-53476
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2025-53476
30-day exploitation probability 0.46%
first.org - EUVDVulnerability recordEUVD-2025-32061
A denial of service vulnerability exists in the ModbusTCP server functionality of OpenPLC _v3 a931181e8b81e36fadf7b74d5cba99b73c3f6d58. A specially crafted series of network connections can lead to the server not processing subsequent Modbus requests. An attacker can open a serie
euvd.enisa.europa.eu
References
Freshness
Last verified in this catalog Oct 23, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- CVE.orgOct 23, 2026
- FIRST EPSSOct 23, 2026
- EUVDOct 23, 2026