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Fencer Intel
medium 5.3

CVE-2018-4835 json

A vulnerability has been identified in TeleControl Server Basic < V3.1.

published 2018-01-25 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-16621

cvss
5.3
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

A vulnerability has been identified in TeleControl Server Basic < V3.1. An attacker with network access to the TeleControl Server Basic's port 8000/tcp could bypass the authentication mechanism and read limited information.

Patch / fix

  • siemens telecontrol_server_basic 3.1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-18-030-02 updated cvss 5.3

Siemens TeleControl Server Basic

  • Siemens TeleControl Server Basic < 3.1
    affected: vendor fix, mitigation “If TeleControl Server Basic is operated in standalone mode, then users can close Port 8000/TCP on the Windows firewall to mitigate vulnerabilities CVE-2018-4835 and CVE-2018-4836.” support.industry.siemens.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Exploit prediction

2.21% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 5.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:P/I:N/A:N

Affected products

  • Siemens AG TeleControl Server Basic

Classification

Weakness
  • CWE-287 Improper Authentication
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.