An Improper Input Validation issue was discovered in Siemens SIMATIC PCS 7 V8.1 prior to V8.1 SP1 with WinCC V7.3 Upd 13, and V8.2 all versi
An Improper Input Validation issue was discovered in Siemens SIMATIC PCS 7 V8.1 prior to V8.1 SP1 with WinCC V7.3 Upd 13, and V8.2 all versions. The improper input validation vulnerability has been identified, which may allow an authenticated remote attacker who is a member of the administrators group to crash services by sending specially crafted messages to the DCOM interface.
- Published
- Nov 6, 2017
- Updated
- Jun 16, 2026
- EPSS
- 3.7% · 89th percentile
- CWE
- CWE-20
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Report tools
Action score
20
Monitor
Low priority for now.
- CVSS
- 19 / 40 · 4.9 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 3.7%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| siemens | simatic pcs7 | cpe:2.3:a:siemens:simatic_pcs7 |
| siemens | simatic wincc | cpe:2.3:a:siemens:simatic_wincc |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- siemens simatic pcs78.1
- siemens simatic pcs78.2
- siemens simatic wincc7.3
Versions reported by the vendor
Affected version ranges reported by the assigning authority (icscert). Independent of NVD's CPE analysis and usually ahead of it.
n/a Siemens SIMATIC PCS 7
- Siemens SIMATIC PCS 7affected
Same product
siemens: all recordsOther highest-scoring records for the same primary product.
- CVE-2017-12069An XXE vulnerability has been identified in OPC Foundation UA .NET Sample Code before 2017-03-21 and Local Discovery Server (LDS) before 1.033Monitor
- CVE-2013-3958The login implementation in the Web Navigator in Siemens WinCC before 7.2 Update 1, as used in SIMATIC PCS7 8.0 SP1 and earlier and other pr31Monitor
- CVE-2013-3957SQL injection vulnerability in the login screen in the Web Navigator in Siemens WinCC before 7.2 Update 1, as used in SIMATIC PCS7 8.0 SP1 a31Monitor
- CVE-2012-3032SQL injection vulnerability in WebNavigator in Siemens WinCC 7.0 SP3 and earlier, as used in SIMATIC PCS7 and other products, allows remote 31Monitor
- CVE-2013-0674Buffer overflow in the RegReader ActiveX control in Siemens WinCC before 7.2, as used in SIMATIC PCS7 before 8.0 SP1 and other products, all28Monitor
- CVE-2014-4686The Project administration application in Siemens SIMATIC WinCC before 7.3, as used in PCS7 and other products, has a hardcoded encryption k27Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- Administrator privileges are required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-20 · Improper Input ValidationCVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Server Side Include (SSI) InjectionCAPEC-101likelihood: High · High
- Cross Zone ScriptingCAPEC-104likelihood: Medium · High
- Command Line Execution through SQL InjectionCAPEC-108likelihood: Low · Very High
- Object Relational Mapping InjectionCAPEC-109likelihood: Low · High
- SQL Injection through SOAP Parameter TamperingCAPEC-110likelihood: High · Very High
- Double EncodingCAPEC-120likelihood: Low · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
ATT&CK techniques
- Obfuscated Files or InformationT1027
- Masquerading: Invalid Code SignatureT1036.001
- Steal Web Session CookieT1539
- Subvert Trust Controls: Code SigningT1553.002
- Impair Defenses:Impair Command History LoggingT1562.003
- Hijack Execution Flow:Dynamic Linker HijackingT1574.006
- Hijack Execution Flow:Path Interception by PATH Environment VariableT1574.007
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- www.securityfocus.com/bid/101680
- www.securitytracker.com/id/1039729
- ics-cert.us-cert.gov/advisories/ICSA-17-306-01
Vendor advisories and official records. Exploit/PoC links are deliberately left out.