CVE-2011-4508

highpriority · track · 38EPSS 0.030 · 87 %ileEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.98% (87th) EPSS

CVSS 9.3 · high

Is it mine?

27 products

Check your exposure

Who says so?

3 sources

enisa_euvd · cisa_csaf_ot · nvd

EPSS · scored 2026-10-22

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 generates predictable authentication tokens for cookies, which makes it easier for remote attackers to bypass authentication via a crafted cookie.

remediations

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

No vendor fix yet; a mitigation is available.

MitigationMultiple SIMATIC Panelscisa_csaf_ot
Product documentation has been updated to tell the user how to set a proper password during initial setup to remove the risk of the default password vulnerability.
MitigationSIMATIC WinCC Runtime Advancedcisa_csaf_ot
Product documentation has been updated to tell the user how to set a proper password during initial setup to remove the risk of the default password vulnerability.
MitigationSIMATIC WinCC flexible RTcisa_csaf_ot
Product documentation has been updated to tell the user how to set a proper password during initial setup to remove the risk of the default password vulnerability.
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.

9.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.9–9.3

v2.09.3highAV:N/AC:M/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 8.6 · impact 10

v2.09.3criticalAV:N/AC:M/Au:N/C:C/I:C/A:Csecondary · CISA US

v2.07.9highAV:N/AC:M/Au:N/C:C/I:C/A:C/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-287USprimaryCWE-287US

affected products (27)

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 Multiple SIMATIC Panelsall versionscisa_csaf_otUS
Siemens SIMATIC WinCC Runtime Advanced≤ 11|11|SP1|11|SP2cisa_csaf_otUS
Siemens SIMATIC WinCC flexible RT≤ 2004|2005|2005|SP1|2007|2008|2008|SP1|2008|SP2cisa_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:*:*:*:*:*:*:*:*

showing 20 of 27

advisories (2)

Vendor and ecosystem advisories describing this.

ICSA-11-356-01Siemens Simatic HMI Authentication Vulnerabilities2011-09-24icsa · 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
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 (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd cisa_csaf_ot nvd NVD CVE.org MITRE

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

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+7662 more

references (4)

External citations — patches, advisories, analysis.

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