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CVE-2011-4879

38
FAUCET Score

CVE-2011-4879 describes a critical vulnerability in the miniweb.exe component of Siemens WinCC flexible and related HMI products, where improper handling of URIs starting with a 0xfa character allows remote attackers to read arbitrary memory or cause a denial of service. With a CVSS score of 8.5, this vulnerability is easily exploitable over the network without authentication, leading to potential data exposure or system crashes. While there is an ExploitDB entry (EDB-18166) detailing multiple vulnerabilities, there is no indication of active exploitation, Metasploit/Nuclei modules, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
2004CPE matchmatch criteria
cpe:2.3:a:siemens:wincc_flexible:2004:*:*:*:*:*:*:*
2005CPE matchmatch criteria
cpe:2.3:a:siemens:wincc_flexible:2005:*:*:*:*:*:*:*
2007CPE matchmatch criteria
cpe:2.3:a:siemens:wincc_flexible:2007:*:*:*:*:*:*:*
2008CPE matchmatch criteria
cpe:2.3:a:siemens:wincc_flexible:2008:*:*:*:*:*:*:*
2008CPE matchmatch criteria
cpe:2.3:a:siemens:wincc_flexible:2008:sp1:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

8.5HIGH

AV:N/AC:L/Au:N/C:P/I:N/A:C

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
7.8
CvssVersion
2.0

Exploit Intelligence

EPSS Score
12.54%
Probability of exploitation in next 30 days
EPSS Percentile
95.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
ExploitDB: EDB-18166 · Nov 28, 2011
This CVE's current EPSS score of 0.1255 is in the 94th percentile among its peer group of 51,455 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 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

aluigi.org / adv/winccflex_1-adv.txt
exchange.xforce.ibmcloud.com / vulnerabilities/71453
exploit-db.com / exploits/18166
osvdb.org / 77384
siemens.com / corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345442.pdf
Vendor Advisory
us-cert.gov / control_systems/pdf/ICSA-12-030-01.pdf
US Government Resource
us-cert.gov / control_systems/pdf/ICS-ALERT-11-332-02A.pdf
us-cert.gov / control_systems/pdf/ICS-ALERT-11-332-02.pdf