CVE-2011-3321
Heap-based buffer overflow in the Siemens WinCC Runtime Advanced Loader, as used in SIMATIC WinCC...
Heap-based buffer overflow in the Siemens WinCC Runtime Advanced Loader, as used in SIMATIC WinCC flexible Runtime and SIMATIC WinCC (TIA Portal) Runtime Advanced, allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via a crafted packet to TCP port 2308.
Exploit likelihood
What each source reports
NVD Score used
Heap-based buffer overflow in the Siemens WinCC Runtime Advanced Loader, as used in SIMATIC WinCC flexible Runtime and SIMATIC WinCC (TIA Portal) Runtime Advanced, allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via a crafted packet to TCP port 2308.
- Record
CVE-2011-3321- CVSS 2.0
- 9.3 High
AV:N/AC:M/Au:N/C:C/I:C/A:C - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE List No score
Heap-based buffer overflow in the Siemens WinCC Runtime Advanced Loader, as used in SIMATIC WinCC flexible Runtime and SIMATIC WinCC (TIA Portal) Runtime Advanced, allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via a crafted packet to TCP port 2308.
- Record
CVE-2011-3321- Updated
- 2026-11-02
EUVDEUVD-2011-3285 No score
Heap-based buffer overflow in the Siemens WinCC Runtime Advanced Loader, as used in SIMATIC WinCC flexible Runtime and SIMATIC WinCC (TIA Portal) Runtime Advanced, allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via a crafted packet to TCP port 2308.
- Record
EUVD-2011-3285- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-3gp6-fj2v-m5f7 No score
Heap-based buffer overflow in the Siemens WinCC Runtime Advanced Loader, as used in SIMATIC WinCC...
Heap-based buffer overflow in the Siemens WinCC Runtime Advanced Loader, as used in SIMATIC WinCC flexible Runtime and SIMATIC WinCC (TIA Portal) Runtime Advanced, allows remote attackers to cause a denial of service (memory corruption) or possibly execute arbitrary code via a crafted packet to TCP port 2308.
- Record
GHSA-3gp6-fj2v-m5f7- Weakness
- CWE-119
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2011-3321 is a high vulnerability (CVSS 9.3) in Siemens Simatic Wincc Flexible Runtime, published September 15, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 7.07%, the 94th percentile. No source names a fixed version.
References
support.automation.siemens.com/WW/view/en/29054992
cache.automation.siemens.com/dnl/jI/jI0NDY5AAAA_29054992_FAQ/Siemens_Security_Advisory_SSA-460621_V1_2.pdf
exchange.xforce.ibmcloud.com/vulnerabilities/69803
secunia.com/advisories/46011
us-cert.gov/control_systems/pdf/ICSA-11-244-01.pdf
nvd.nist.gov/vuln/detail/CVE-2011-3321
github.com/advisories/GHSA-3gp6-fj2v-m5f7