THREATPORT/VULNERABILITY/CVE-2011-4877
HIGH SEVERITY

CVE-2011-4877

Wincc Flexible vulnerability

CVSS
7.1
EPSS
7.5%
EPSS pct
94th
Exploited
No known
HmiLoad in the runtime loader 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, when Transfer Mode is enabled, allows remote attackers to cause a denial of service (application crash) by sending crafted data over TCP.
Affected vendor
Siemens
Affected product
Wincc Flexible
CVSS vector
AV:N/AC:M/Au:N/C:N/I:N/A:C
Weakness type (CWE)
  • CWE-20 — Improper Input Validation
Published
2012-02-03

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, medium attack complexity, requiring no authentication. Successful exploitation leads to complete impact to availability.

Its EPSS score of 7.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 94% of all scored CVEs.

Check your external exposure to CVE-2011-4877

  • Confirm whether Siemens Wincc Flexible is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2011-4877.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2011-4877

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2011-4877 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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