THREATPORT/VULNERABILITY/CVE-2011-4879
HIGH SEVERITY

CVE-2011-4879

Wincc Flexible vulnerability

CVSS
8.5
EPSS
12.5%
EPSS pct
96th
Exploited
No known
miniweb.exe in the HMI web server in Siemens WinCC flexible 2004, 2005, 2007, and 2008 before SP3; WinCC V11 (aka TIA portal) before SP2 Update 1; the TP, OP, MP, Comfort Panels, and Mobile Panels SIMATIC HMI panels; WinCC V11 Runtime Advanced; and WinCC flexible Runtime does not properly handle URIs beginning with a 0xfa character, which allows remote attackers to read data from arbitrary memory locations or cause a denial of service (application crash) via a crafted POST request.
Affected vendor
Siemens
Affected product
Wincc Flexible
CVSS vector
AV:N/AC:L/Au:N/C:P/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, low attack complexity, requiring no authentication. Successful exploitation leads to partial impact to confidentiality, complete impact to availability.

Its EPSS score of 12.5% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 96% of all scored CVEs.

Check your external exposure to CVE-2011-4879

  • Confirm whether Siemens Wincc Flexible is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2011-4879.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2011-4879

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2011-4879 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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