CVE intelligence and bounded remediation

CVE-2018-4834 — Siemens Pxc12/22/36-E.D Firmware security vulnerability

Critical CVSS 9.8

A vulnerability has been identified in Desigo PXC00-E.D V4.10 (All versions < V4.10.111), Desigo PXC00-E.D V5.00 (All versions < V5.0.171), Desigo PXC00-E.D V5.10 (All versions < V5.10.69), Desigo PXC00-E.D V6.00 (All versions < V6.0.204), Desigo PXC00/64/128-U V4.10 (All versions < V4.10.111 only with web module), Desigo PXC00/64/128-U V5.00 (All versions < V5.0.171 only with web module), Desigo PXC00/64/128-U V5.10 (All versions < V5.10.69 only with web module), Desigo PXC00/64/128-U V6.00 (All versions < V6.0.204 only with web module), Desigo PXC001-E.D V4.10 (All versions < V4.10.111), Desigo PXC001-E.D V5.00 (All versions < V5.0.171), Desigo PXC001-E.D V5.10 (All versions < V5.10.69), Desigo PXC001-E.D V6.00 (All versions < V6.0.204), Desigo PXC100-E.D V4.10 (All versions < V4.10.111), Desigo PXC100-E.D V5.00 (All versions < V5.0.171), Desigo PXC100-E.D V5.10 (All versions < V5.10.69), Desigo PXC100-E.D V6.00 (All versions < V6.0.204), Desigo PXC12-E.D V4.10 (All versions < V4.10.111), Desigo PXC12-E.D V5.00 (All versions < V5.0.171), Desigo PXC12-E.D V5.10 (All versions < V5.10.69), Desigo PXC12-E.D V6.00 (All versions < V6.0.204), Desigo PXC200-E.D V4.10 (All versions < V4.…

Severity
Critical
CVSS
9.8 (3.1)
Published
2018-01-24
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-306, CWE-434

Affected products

  • siemens / pxc12/22/36-e.d_firmware
  • siemens / pxc00/50/100/200-e.d_firmware
  • siemens / pxc00/64/128-u_firmware
  • siemens / pxc001-e.d_firmware
  • siemens / pxm20-e_firmware

Matched remediation archetype

Authentication bypass and missing authentication

This catalog composition supplies bounded fallback guidance. Explicitly reviewed curated workflows load with the complete record below.

Check exposure

  • Map every affected endpoint and protocol path, including alternate ports, legacy routes, recovery flows, service accounts, and machine-to-machine access.
  • Confirm which deployments enable the affected authentication mode and whether the interface is reachable from untrusted networks.
  • Review session, token, credential, and proxy trust configuration without attempting account takeover.

Remediate safely

  • Apply the supported fix and centralize fail-closed authentication before protected request handling.
  • Remove default or embedded credentials, rotate affected secrets and sessions, and bind authentication decisions to the intended audience and channel.
  • Add negative tests for alternate routes, malformed or absent credentials, recovery flows, and proxy-derived identity.

Authoritative sources

Complete CVE record and remediation plan

The detailed catalog view below loads this exact record, its source evidence, and the full seven-phase agentic change plan.