CVE-2011-4879

highpriority · attend · 48EPSS 0.121 · 96 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

1 exploit · functional

Likely / severe?

12.1% (96th) EPSS

CVSS 8.5 · high

Is it mine?

24 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-22

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.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

No vendor fix yet; a mitigation is available.

MitigationMultiple SIMATIC HMI panels (TP, OP, MP, Comfort Panels, Mobile Panels)cisa_csaf_ot
Lack of telnet daemon authentication - Because telnet is a clear text protocol, customers are advised to be aware of corresponding risks. The telnet daemon is disabled by default in product versions WinCC flexible 2008 SP3 and newer, as well as WinCC V11 (TIA Portal) SP2 and newer. Siemens recommends disabling the telnet function on SIMATIC panels when telnet is not actively being used.
MitigationWinCC V11 (TIA portal)cisa_csaf_ot
Lack of telnet daemon authentication - Because telnet is a clear text protocol, customers are advised to be aware of corresponding risks. The telnet daemon is disabled by default in product versions WinCC flexible 2008 SP3 and newer, as well as WinCC V11 (TIA Portal) SP2 and newer. Siemens recommends disabling the telnet function on SIMATIC panels when telnet is not actively being used.
MitigationWinCC V11 Runtime Advancedcisa_csaf_ot
Lack of telnet daemon authentication - Because telnet is a clear text protocol, customers are advised to be aware of corresponding risks. The telnet daemon is disabled by default in product versions WinCC flexible 2008 SP3 and newer, as well as WinCC V11 (TIA Portal) SP2 and newer. Siemens recommends disabling the telnet function on SIMATIC panels when telnet is not actively being used.
MitigationWinCC flexiblecisa_csaf_ot
Lack of telnet daemon authentication - Because telnet is a clear text protocol, customers are advised to be aware of corresponding risks. The telnet daemon is disabled by default in product versions WinCC flexible 2008 SP3 and newer, as well as WinCC V11 (TIA Portal) SP2 and newer. Siemens recommends disabling the telnet function on SIMATIC panels when telnet is not actively being used.
MitigationWinCC flexible Runtimecisa_csaf_ot
Lack of telnet daemon authentication - Because telnet is a clear text protocol, customers are advised to be aware of corresponding risks. The telnet daemon is disabled by default in product versions WinCC flexible 2008 SP3 and newer, as well as WinCC V11 (TIA Portal) SP2 and newer. Siemens recommends disabling the telnet function on SIMATIC panels when telnet is not actively being used.

cvss

Technical severity, 0–10. One row per scoring source.

8.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.08.5highAV:N/AC:L/Au:N/C:P/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 7.8

v2.08.5highAV:N/AC:L/Au:N/C:P/I:N/A:Csecondary · CISA US

v2.07.7highAV:N/AC:L/Au:N/C:P/I:N/A:C/E:POCsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USprimaryCWE-119US

exploits (1)

Public proof-of-concept and weaponised exploit code.

EDB-18166Siemens SIMATIC WinCC Flexible (Runtime) - Multiple Vulnerabilitiesfunctional · exploit_db

affected products (24)

Products and version ranges known to be affected.

Siemens Multiple SIMATIC HMI panels (TP, OP, MP, Comfort Panels, Mobile Panels): vers:all/*all versionscisa_csaf_otUS
Siemens WinCC V11 (TIA portal): vers:all/*all versionscisa_csaf_otUS
Siemens WinCC V11 Runtime Advanced: vers:all/*all versionscisa_csaf_otUS
Siemens WinCC flexible Runtime: vers:all/*all versionscisa_csaf_otUS
Siemens WinCC flexible: 2004|2005|2007|2008all versionscisa_csaf_otUS
Siemens Multiple SIMATIC HMI panels (TP, OP, MP, Comfort Panels, Mobile Panels)≤ vers:all/*cisa_csaf_otUS
Siemens WinCC V11 (TIA portal)≤ vers:all/*cisa_csaf_otUS
Siemens WinCC V11 Runtime Advanced≤ vers:all/*cisa_csaf_otUS
Siemens WinCC flexible≤ 2004|2005|2007|2008cisa_csaf_otUS
Siemens WinCC flexible Runtime≤ vers:all/*cisa_csaf_otUS
n/a n/a≤ n/aenisa_euvdEU
siemens simatic hmi panels= comfort_panelsnvdUScpe:2.3:a:siemens:simatic_hmi_panels:*:*:*:*:*:*:*:*
siemens simatic hmi panels= mobile_panelsnvdUScpe:2.3:a:siemens:simatic_hmi_panels:*:*:*:*:*:*:*:*
siemens simatic hmi panels= mpnvdUScpe:2.3:a:siemens:simatic_hmi_panels:*:*:*:*:*:*:*:*
siemens simatic hmi panels= opnvdUScpe:2.3:a:siemens:simatic_hmi_panels:*:*:*:*:*:*:*:*
siemens simatic hmi panels= tpnvdUScpe:2.3:a:siemens:simatic_hmi_panels:*:*:*:*:*:*:*:*
siemens wincc≤ v11nvdUScpe:2.3:a:siemens:wincc:*:*:*:*:*:*:*:*
siemens wincc= v11nvdUScpe:2.3:a:siemens:wincc:*:*:*:*:*:*:*:*
siemens wincc flexible= 2004nvdUScpe:2.3:a:siemens:wincc_flexible:*:*:*:*:*:*:*:*
siemens wincc flexible= 2005nvdUScpe:2.3:a:siemens:wincc_flexible:*:*:*:*:*:*:*:*

showing 20 of 24

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-12-030-01ASiemens SIMATIC WinCC Vulnerabilities2012-11-02icsa · cisa_csaf_otUS
This CSAF advisory was extracted from unstructured data and may contain inaccuracies. If you notice any errors, please reach out to the designated contact at CISA CSAF: central@cisa.dhs.gov

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

published 2012-02-03modified 2026-06-16

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+25102 more

references (19)

External citations — patches, advisories, analysis.

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