What is CVE-2018-11453?

CVE-2018-11453 is a high-severity vulnerability in Siemens Simatic Step 7 \(Tia Portal\), classified under Incorrect Default Permissions. CVSS score: 7.8/10. Published 2018-08-07.

How severe is CVE-2018-11453?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Siemens Simatic Step 7 \(Tia Portal\)

CVE-2018-11453

A vulnerability has been identified in SIMATIC STEP 7 (TIA Portal) and WinCC (TIA Portal) V10, V11, V12 (All versions), SIMATIC STEP 7 (TIA Portal) and WinCC (TIA Portal) V13 (All versions < V13 SP2 Update 2), SIMATIC STEP 7 (TIA Portal) and WinCC (TIA Portal) V14 (All versions < V14 SP1 Update 6), SIMATIC STEP 7 (TIA Portal) and WinCC (TIA Portal) V15 (All versions < V15 Update 2). Improper file permissions in the default installation of TIA Portal may allow an attacker with local file system access to insert specially crafted files which may prevent TIA Portal startup (Denial-of-Service) or lead to local code execution. No special privileges are required, but the victim needs to attempt to start TIA Portal after the manipulation.

Published 2018-08-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.004 (28.1th percentile), scored 2026-10-21.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: -0.001

Affected products

Siemens Simatic Step 7 \(Tia Portal\) — versions 10.0, 11.0, 12.0
Siemens Simatic Wincc \(Tia Portal\) — versions 10.0, 11.0, 12.0
Siemens Ag Simatic Step 7 (Tia Portal) And Wincc V10, V11, V12, V13, V14, V15 — versions SIMATIC STEP 7 (TIA Portal) and WinCC (TIA Portal) V14 : All versions < V14 SP1 Update 6, SIMATIC STEP 7 (TIA Portal) and WinCC (TIA Portal) V13 : All versions < V13 SP2 Update 2, SIMATIC STEP 7 (TIA Portal) and WinCC (TIA Portal) V10, V11, V12 : All versions

Weakness classification (CWE)

References

www.securityfocus.com/bid/105115 (VDB Entry, Third Party Advisory, vdb-entry)
cert-portal.siemens.com/productcert/pdf/ssa-979106.pdf (Vendor Advisory)

Frequently asked questions

What is CVE-2018-11453?: CVE-2018-11453 is a high-severity vulnerability in Siemens Simatic Step 7 \(Tia Portal\), classified under Incorrect Default Permissions. CVSS score: 7.8/10. Published 2018-08-07.
How severe is CVE-2018-11453?: High severity. CVSS v3 base score is 7.8 out of 10.