High Input validation

CVE-2023-26293 — A vulnerability has been identified in TIA Portal V15 (All versions), TIA Portal V16 (All...

A vulnerability has been identified in Totally Integrated Automation Portal (TIA Portal) V15 (All versions), Totally Integrated Automation Portal (TIA Portal) V16 (All versions < V16 Update 7), Totally Integrated Automation Portal (TIA Portal) V17 (All versions < V17 Update 6), Totally Integrated Automation Portal (TIA Portal) V18 (All versions < V18 Update 1). Affected products contain a path traversal vulnerability that could allow the creation or overwrite of arbitrary files in the engineering system. If the user is tricked to open a malicious PC system configuration file, an attacker could exploit this vulnerability to achieve arbitrary code execution.

Published Apr 11, 2023 · Updated Oct 23, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: siemens

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+2
Technical severity (high)+6

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.25%

ahead of 15% of scored CVEs · Oct 24, 2026

Affects

Siemens

Tia Portal and 4 more

CVSS base

7.3

High · 4 source(s)

Prioritization reference: 7.8 provisional

CISA SSVC assessment CISA

Three decision points CISA publishes for the CVEs it assesses (SSVC 2.0.3). A stakeholder decision, not a severity score.

Exploitation

None

none · proof-of-concept · active

Automatable

can an attacker script the kill-chain steps

Technical impact

Total

partial · total control of the vulnerable component

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

Documented patch — cert-portal.siemens.com (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Siemens Tia Portal, Siemens Totally Integrated Automation Portal (TIA Portal) V15, Siemens Totally Integrated Automation Portal (TIA Portal) V16…).
Apply the fixed version or the patch documented under Remediation.
Exploitation requires user interaction: tighten email/web filtering and warn affected users.
Search available logs for exploit probes matching the vulnerability class (input validation), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Siemens	Tia Portal	version 15version 16version 17version 17-update1version 17-update2version 17-update3version 17-update4version 17-update5 and 1 more version 18	Vulnerable	NIST National Vulnerability Database
Siemens	Totally Integrated Automation Portal (TIA Portal) V15	versions not specified by the source	Vulnerable	CVE Program (cve.org) e CISA ADP
Siemens	Totally Integrated Automation Portal (TIA Portal) V16	< V16 Update 7	Vulnerable	CVE Program (cve.org) e CISA ADP
Siemens	Totally Integrated Automation Portal (TIA Portal) V17	< V17 Update 6	Vulnerable	CVE Program (cve.org) e CISA ADP
Siemens	Totally Integrated Automation Portal (TIA Portal) V18	< V18 Update 1	Vulnerable	CVE Program (cve.org) e CISA ADP

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector

Local

Attack complexity

Low

Privileges required

None

User interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

Low

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

Score	Version	Severity	Expl.	Impact	Scored by
7.8	CVSS 3.1	High	1.8	5.9	nvd@nist.gov via NIST National Vulnerability Database
7.3	CVSS 3.1	High	1.8	5.5	productcert@siemens.com via NIST National Vulnerability Database
7.3	CVSS 3.1	High	—	—	GitHub, Inc. via GitHub Security Advisories
7.3	CVSS 3.1	High	—	—	siemens via CVE Program (cve.org) e CISA ADP

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L (score shown at the top: productcert@siemens.com)

Scoring entities (NIST, CNA, ADP) score independently; each score is shown with its origin. For prioritization we use 7.8 (NVD (NIST)) as a conservative provisional reference — not a definitive official score.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-20 · Improper Input Validation

Other CVEs with this weakness →

EPSS over time FIRST

Oct 23, 2026 → Oct 24, 2026 · 2 reading(s) · max 0.25%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.

endpoint telemetry (EDR)

Timeline

What happened to this CVE, newest first.

2026
Affected products added · siemens/totally integrated automation portal (tia portal) v15, siemens/totally integrated automation portal (tia portal)
Oct 23, 2026 · CVE Program (cve.org) e CISA ADP
SSVC assessment updated
Oct 23, 2026 · CVE Program (cve.org) e CISA ADP
Record published
Oct 23, 2026
Fix documented
Oct 23, 2026 · NIST National Vulnerability Database
Affected products added · siemens/tia portal
Oct 23, 2026 · NIST National Vulnerability Database
CVSS changed · 7.3
Oct 23, 2026 · NIST National Vulnerability Database
Source status changed · → Modified
Oct 23, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 23, 2026 · Alertas do Telegram
2023
CVE published
Apr 11, 2023 · siemens

Source activity

Repeated readings are counted rather than listed.

2× References added · Oct 23, 2026 – Oct 23, 2026
1× Official description updated · Oct 23, 2026 – Oct 23, 2026

References

4 on the record

cert-portal.siemens.com/productcert/pdf/ssa-116924.pdf
Patch, Vendor Advisory, NIST National Vulnerability Database
github.com/advisories/GHSA-pfr5-cpm3-g35v
GitHub Security Advisories
nvd.nist.gov/vuln/detail/CVE-2023-26293
GitHub Security Advisories
cert-portal.siemens.com/productcert/html/ssa-116924.html
NIST National Vulnerability Database

Elsewhere on this site

Siemens
every CVE for this vendor

Input validation
same class

CWE-20
other pages naming this weakness

Related CVEs (same products)

High CVE-2025-30033 Uncontrolled Search Path Element in Siemens Automation License Manager V6.0 Aug 12, 2025

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2023-26293 is "A vulnerability has been identified in TIA Portal V15 (All versions), TIA Portal V16 (All...", rated High. It affects Tia Portal (Siemens); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 7.3 describes technical severity. EPSS 0.25% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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