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CVE-2011-3321

29
FAUCET Score

CVE-2011-3321 describes a heap-based buffer overflow in the Siemens WinCC Runtime Advanced Loader, impacting SIMATIC WinCC flexible Runtime and SIMATIC WinCC (TIA Portal) Runtime Advanced. This vulnerability has a critical CVSS score of 9.3, indicating a high potential for remote attackers to cause denial of service through memory corruption or even execute arbitrary code via crafted packets to TCP port 2308. Despite its severity, there is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:siemens:simatic_wincc_flexible_runtime:*:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:a:siemens:simatic_wincc_runtime:-:*:*:*:advanced:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

AV:N/AC:M/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
7.07%
Probability of exploitation in next 30 days
EPSS Percentile
93.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0707 is in the 70th percentile among its peer group of 8,918 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

cache.automation.siemens.com / dnl/jI/jI0NDY5AAAA_29054992_FAQ/Siemens_Security_Advisory_SSA-460621_V1_2.pdf
secunia.com / advisories/46011
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/69803
support.automation.siemens.com / WW/view/en/29054992
us-cert.gov / control_systems/pdf/ICSA-11-244-01.pdf
US Government Resource