CVE-2025-41769: Phoenix Contact PLCnext PROFINET buffer overflow

CVE-2025-41769 · Severity: critical · CVSS 9.8 · Published 2026-08-12

Phoenix Contact PLCnext Control devices run industrial automation controllers that manage factory equipment and processes. These devices contain a buffer overflow vulnerability in their PROFINET networking service that can be exploited by attackers on the network without authentication. An attacker could reboot the device, causing production downtime, or execute arbitrary code to gain full control of the controller and the equipment it manages.

Vendors: Phoenix Contact.

Quick answers

Is CVE-2025-41769 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-41769 being exploited in the wild.
How severe is CVE-2025-41769?
Critical severity, with a CVSS score of 9.8, published 12 August 2026.
Which products and versions are affected?
Phoenix Contact PLCnext Control AXC F 1152 prior to 2026.0.3; Phoenix Contact PLCnext Control Catan C1 prior to 2026.0.3; Phoenix Contact PLCnext Control EPC 1502 prior to 2026.0.3; Phoenix Contact PLCnext Control EPC 1522 prior to 2026.0.3.
Is there a fix for CVE-2025-41769?
A patch was published on 2026-08-12: Fix available in PLCnext firmware version 2026.0.3 and later Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2025-41769 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2025-41769?
Check whether you run Phoenix Contact PLCnext Control AXC F 1152, Phoenix Contact PLCnext Control Catan C1, Phoenix Contact PLCnext Control EPC 1502 or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a buffer overflow in the PROFINET service of PLCnext firmware versions prior to 2026.0.3. The flaw exists in the default configuration and can be triggered by an unauthenticated remote attacker sending malformed PROFINET protocol packets over the network. Successful exploitation allows denial of service (device reboot) or remote code execution with full device privileges. The vulnerability is resolved in PLCnext firmware version 2026.0.3 and later. No public exploit code is currently known to be in active use.

Affected products

  • Phoenix Contact PLCnext Control Catan C1 prior to 2026.0.3
  • Phoenix Contact PLCnext Control EPC 1502 prior to 2026.0.3
  • Phoenix Contact PLCnext Control EPC 1522 prior to 2026.0.3
  • Phoenix Contact PLCnext Control AXC F 1152 prior to 2026.0.3

Timeline

  • 2026-08-12: disclosed: Vulnerability publicly disclosed
  • 2026-08-12: patched: Fix available in PLCnext firmware version 2026.0.3 and later

References

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