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TI-2025-33421 Aliases CVE-2025-53476GHSA-pm3x-2fvm-pvp8

A denial of service vulnerability exists in the ModbusTCP server functionality of OpenPLC…

Priority LOW 30CWE-775Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · Low
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00465 40th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
OpenPLCOpenPLC_v3a931181—No fix listedCNA
  • OpenPLC_v3 VendorOpenPLC Affected a931181 Fixed in — No fix listed CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:o:openplcproject:openplc_v3_firmware:*:*:*:*:*:*:*:*——OpenPLC
  • cpe:2.3:o:openplcproject:openplc_v3_firmware:*:*:*:*:*:*:*:* Versions — — ·OpenPLC

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-53476
  2. 2026-10-03 Alias added: GHSA-pm3x-2fvm-pvp8

References

Other 1

  • TI-2021-08453 OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows remote… KEVCVSS 3.1HIGH 8.8
  • TI-2021-08454 OpenPLC ScadaBR through 0.9.1 on Linux and through 1.12.4 on Windows allows stored XSS via system_settings.shtm. KEVCVSS 3.1MEDIUM 5.4
  • TI-2024-22495 Stack-based buffer overflow in OpenPLC_v3 CVSS 3.1CRITICAL 9.8
  • TI-2024-26520 Incorrect type conversion in OpenPLC_v3 CVSS 3.1HIGH 7.5
  • TI-2024-26519 Incorrect type conversion in OpenPLC_v3 CVSS 3.1HIGH 7.5
  • TI-2024-24528 Out-of-bounds read in OpenPLC_v3 CVSS 3.1HIGH 7.5
See all 21 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences