HOMEVULNERABILITIESCVE-2011-4509
CRITICAL

CVE-2011-4509

CWE-264Published: February 3, 2012· Updated: Jun 16, 2026

10.0
CVSS v3.1

Official Description

The HMI web server in Siemens WinCC flexible 2004, 2005, 2007, and 2008; WinCC V11 (aka TIA portal); the TP, OP, MP, Comfort Panels, and Mobile Panels SIMATIC HMI panels; WinCC V11 Runtime Advanced; and WinCC flexible Runtime has an improperly selected default password for the administrator account, which makes it easier for remote attackers to obtain access via a brute-force approach involving many HTTP requests.

NVD Source

Technical Analysis

CVE-2011-4509 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityC
IntegrityC
AvailabilityC
AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected Vendors & Products

siemens5 product(s)
wincc flexiblewinccsimatic hmi panelswincc runtime advancedwincc flexible runtime
Source: NVD CPE · 12 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttp://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345442.pdf
ADVISORYhttp://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345442.pdf

All References (4)

→
http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345442.pdfVendor Advisory
→
http://www.us-cert.gov/control_systems/pdf/ICSA-12-030-01.pdfUS Government Resource
→
http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345442.pdfVendor Advisory
→
http://www.us-cert.gov/control_systems/pdf/ICSA-12-030-01.pdfUS Government Resource

Quick Facts

CVE IDCVE-2011-4509
CVSS Score10.0 / 10
SeverityCRITICAL
WeaknessCWE-264
CISA KEVNo
Affected1 vendor(s)
PublishedFeb 3, 2012

Related CVEs (CWE-264)

CVE-2003-1495
10.0
CVE-2007-3455
10.0
CVE-2003-1081
10.0
CVE-2003-1346
10.0
CVE-2003-1595
10.0
CVE-2007-3500
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2011-4509 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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