CVE-2019-13927

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-12-12 · updated 2026-06-17
Weakness: CWE-472

Description

A vulnerability has been identified in Desigo PX automation controllers PXC00-E.D, PXC50-E.D, PXC100-E.D, PXC200-E.D with Desigo PX Web modules PXA40-W0, PXA40-W1, PXA40-W2 (All firmware versions < V6.00.320), Desigo PX automation controllers PXC00-U, PXC64-U, PXC128-U with Desigo PX Web modules PXA30-W0, PXA30-W1, PXA30-W2 (All firmware versions < V6.00.320), Desigo PX automation controllers PXC22.1-E.D, PXC36-E.D, PXC36.1-E.D with activated web server (All firmware versions < V6.00.320). The device contains a vulnerability that could allow an attacker to cause a denial of service condition on the device's web server by sending a specially crafted HTTP message to the web server port (tcp/80). The security vulnerability could be exploited by an attacker with network access to an affected device. Successful exploitation requires no system privileges and no user interaction. An attacker could use the vulnerability to compromise the availability of the device's web service. While the device itself stays operational, the web server responds with HTTP status code 404 (Not found) to any further request. A reboot is required to recover the web interface. At the time of advisory publication no public exploitation of this security vulnerability was known.

Affected products

Siemens Pxa30-W0 Firmware: before 6.00.320 — fixed in 6.00.320
Siemens Pxa30-W1 Firmware: before 6.00.320 — fixed in 6.00.320
Siemens Pxa30-W2 Firmware: before 6.00.320 — fixed in 6.00.320
Siemens Pxa40-W0 Firmware: before 6.00.320 — fixed in 6.00.320
Siemens Pxa40-W1 Firmware: before 6.00.320 — fixed in 6.00.320
Siemens Pxa40-W2 Firmware: before 6.00.320 — fixed in 6.00.320
Siemens Pxc00-E.D Firmware: before 6.00.320 — fixed in 6.00.320
Siemens Pxc00-U Firmware: before 6.00.320 — fixed in 6.00.320
Siemens Pxc100-E.D Firmware: before 6.00.320 — fixed in 6.00.320
Siemens Pxc128-U Firmware: before 6.00.320 — fixed in 6.00.320
Siemens Pxc200-E.D Firmware: before 6.00.320 — fixed in 6.00.320
Siemens Pxc22.1-E.D Firmware: before 6.00.320 — fixed in 6.00.320
Siemens Pxc36-E.D Firmware: before 6.00.320 — fixed in 6.00.320
Siemens Pxc36.1-E.D Firmware: before 6.00.320 — fixed in 6.00.320
Siemens Pxc50-E.D Firmware: before 6.00.320 — fixed in 6.00.320
Siemens Pxc64-U Firmware: before 6.00.320 — fixed in 6.00.320

How to fix

Upgrade to a fixed version: Siemens Pxa30-W0 Firmware 6.00.320; Siemens Pxa30-W1 Firmware 6.00.320; Siemens Pxa30-W2 Firmware 6.00.320; Siemens Pxa40-W0 Firmware 6.00.320; Siemens Pxa40-W1 Firmware 6.00.320; Siemens Pxa40-W2 Firmware 6.00.320; Siemens Pxc00-E.D Firmware 6.00.320; Siemens Pxc00-U Firmware 6.00.320; Siemens Pxc100-E.D Firmware 6.00.320; Siemens Pxc128-U Firmware 6.00.320; Siemens Pxc200-E.D Firmware 6.00.320; Siemens Pxc22.1-E.D Firmware 6.00.320. Check the vendor advisory for mitigations.

References

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