CVE-2019-8264

highpriority · track · 40EPSS 0.031 · 88 %ileDEEURUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
3.13% (88th) EPSS
CVSS 7.5 · high
Is it mine?
40 products
Check your exposure
Who says so?
5 sources
cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-26

UltraVNC revision 1203 has out-of-bounds access vulnerability in VNC client inside Ultra2 decoder, which can potentially result in code execution. This attack appears to be exploitable via network connectivity. This vulnerability has been fixed in revision 1204.

01

remediations

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

A vendor fix is available.

  • FixedSIMATIC HMI Comfort Outdoor Panels 7" & 15" (incl. SIPLUS variants)siemens_psirt

    Update SIMATIC WinCC (TIA Portal) to V16 Update 4 or later version, and then update panel to V16 Update 4 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109775861/
  • FixedSIMATIC HMI Comfort Panels 4" - 22" (incl. SIPLUS variants)siemens_psirt

    Update SIMATIC WinCC (TIA Portal) to V16 Update 4 or later version, and then update panel to V16 Update 4 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109775861/
  • FixedSIMATIC HMI KTP Mobile Panels KTP400F, KTP700, KTP700F, KTP900 and KTP900Fsiemens_psirt

    Update SIMATIC WinCC (TIA Portal) to V16 Update 4 or later version, and then update panel to V16 Update 4 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109775861/
  • FixedSIMATIC WinCC Runtime Advancedsiemens_psirt

    Update to V16 Update 4 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109776018/
  • FixedSINUMERIK Access MyMachine /P2Pcisa_csaf_ot

    Update to V4.8

  • FixedSINUMERIK PCU base Win10 software /IPCcisa_csaf_ot

    Update to V14.00

  • FixedSINUMERIK PCU base Win7 software /IPCcisa_csaf_ot

    Update to V12.01 HF4

  • FixedSIMATIC HMI Comfort Outdoor Panels 7" & 15" (incl. SIPLUS variants)cisa_csaf_ot

    Update SIMATIC WinCC (TIA Portal) to V16 Update 4 or later version, and then update panel to V16 Update 4 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109775861/
  • FixedSIMATIC HMI Comfort Panels 4" - 22" (incl. SIPLUS variants)cisa_csaf_ot

    Update SIMATIC WinCC (TIA Portal) to V16 Update 4 or later version, and then update panel to V16 Update 4 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109775861/
  • FixedSIMATIC HMI KTP Mobile Panels KTP400F, KTP700, KTP700F, KTP900 and KTP900Fcisa_csaf_ot

    Update SIMATIC WinCC (TIA Portal) to V16 Update 4 or later version, and then update panel to V16 Update 4 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109775861/
  • FixedSIMATIC WinCC Runtime Advancedcisa_csaf_ot

    Update to V16 Update 4 or later version

    https://support.industry.siemens.com/cs/ww/en/view/109776018/
  • MitigationSINAMICS GH150siemens_psirt

    As only SIMATIC HMI image versions < V16 Update 4 are affected, please update the HMI Panel image as included in your installation of SINAMICS GH150 to V16 Update 4 or later version

  • MitigationSINAMICS GL150 (with option X30)siemens_psirt

    As only SIMATIC HMI image versions < V16 Update 4 are affected, please update the HMI Panel image as included in your installation of SINAMICS GL150 (with option X30) to V16 Update 4 or later version

  • MitigationSINAMICS GM150 (with option X30)siemens_psirt

    As only SIMATIC HMI image versions < V16 Update 4 are affected, please update the HMI Panel image as included in your installation of SINAMICS GM150 (with option X30) to V16 Update 4 or later version

  • MitigationSINAMICS SH150siemens_psirt

    As only SIMATIC HMI image versions < V16 Update 4 are affected, please update the HMI Panel image as included in your installation of SINAMICS SH150 to V16 Update 4 or later version

  • MitigationSINAMICS SL150siemens_psirt

    As only SIMATIC HMI image versions < V15 SP1 Update 6 are affected, please update the HMI Panel image as included in your installation of SINAMICS SL150 to V15 SP1 Update 6 or later version

  • MitigationSINAMICS SM120siemens_psirt

    As only SIMATIC HMI image versions < V16 Update 4 are affected, please update the HMI Panel image as included in your installation of SINAMICS SM120 to V16 Update 4 or later version

  • MitigationSINAMICS SM150siemens_psirt

    As only SIMATIC HMI image versions < V15 SP1 Update 6 are affected, please update the HMI Panel image as included in your installation of SINAMICS SM150 to V15 SP1 Update 6 or later version

  • MitigationSINAMICS SM150isiemens_psirt

    As only SIMATIC HMI image versions < V15 SP1 Update 6 are affected, please update the HMI Panel image as included in your installation of SINAMICS SM150i to V15 SP1 Update 6 or later version

  • MitigationSIMATIC HMI Comfort Outdoor Panels 7" & 15" (incl. SIPLUS variants)siemens_psirt

    Restrict access to port 5900/tcp to trusted IP addresses only

  • MitigationSIMATIC HMI Comfort Panels 4" - 22" (incl. SIPLUS variants)siemens_psirt

    Restrict access to port 5900/tcp to trusted IP addresses only

  • MitigationSIMATIC HMI KTP Mobile Panels KTP400F, KTP700, KTP700F, KTP900 and KTP900Fsiemens_psirt

    Restrict access to port 5900/tcp to trusted IP addresses only

  • MitigationSIMATIC WinCC Runtime Advancedsiemens_psirt

    Restrict access to port 5900/tcp to trusted IP addresses only

  • MitigationSINUMERIK Access MyMachine /P2Pcisa_csaf_ot

    Restrict access to the device to the internal or VPN network and to trusted IP addresses only.

  • MitigationSINUMERIK PCU base Win10 software /IPCcisa_csaf_ot

    Restrict access to the device to the internal or VPN network and to trusted IP addresses only.

  • MitigationSINUMERIK PCU base Win7 software /IPCcisa_csaf_ot

    Restrict access to the device to the internal or VPN network and to trusted IP addresses only.

  • MitigationSINAMICS GH150cisa_csaf_ot

    As only SIMATIC HMI image versions < V16 Update 4 are affected, please update the HMI Panel image as included in your installation of SINAMICS GH150 to V16 Update 4 or later version

  • MitigationSINAMICS GL150 (with option X30)cisa_csaf_ot

    As only SIMATIC HMI image versions < V16 Update 4 are affected, please update the HMI Panel image as included in your installation of SINAMICS GL150 (with option X30) to V16 Update 4 or later version

  • MitigationSINAMICS GM150 (with option X30)cisa_csaf_ot

    As only SIMATIC HMI image versions < V16 Update 4 are affected, please update the HMI Panel image as included in your installation of SINAMICS GM150 (with option X30) to V16 Update 4 or later version

  • MitigationSINAMICS SH150cisa_csaf_ot

    As only SIMATIC HMI image versions < V16 Update 4 are affected, please update the HMI Panel image as included in your installation of SINAMICS SH150 to V16 Update 4 or later version

  • MitigationSINAMICS SL150cisa_csaf_ot

    As only SIMATIC HMI image versions < V15 SP1 Update 6 are affected, please update the HMI Panel image as included in your installation of SINAMICS SL150 to V15 SP1 Update 6 or later version

  • MitigationSINAMICS SM120cisa_csaf_ot

    As only SIMATIC HMI image versions < V16 Update 4 are affected, please update the HMI Panel image as included in your installation of SINAMICS SM120 to V16 Update 4 or later version

  • MitigationSINAMICS SM150cisa_csaf_ot

    As only SIMATIC HMI image versions < V15 SP1 Update 6 are affected, please update the HMI Panel image as included in your installation of SINAMICS SM150 to V15 SP1 Update 6 or later version

  • MitigationSINAMICS SM150icisa_csaf_ot

    As only SIMATIC HMI image versions < V15 SP1 Update 6 are affected, please update the HMI Panel image as included in your installation of SINAMICS SM150i to V15 SP1 Update 6 or later version

  • MitigationSIMATIC HMI Comfort Outdoor Panels 7" & 15" (incl. SIPLUS variants)cisa_csaf_ot

    Restrict access to port 5900/tcp to trusted IP addresses only

  • MitigationSIMATIC HMI Comfort Panels 4" - 22" (incl. SIPLUS variants)cisa_csaf_ot

    Restrict access to port 5900/tcp to trusted IP addresses only

  • MitigationSIMATIC HMI KTP Mobile Panels KTP400F, KTP700, KTP700F, KTP900 and KTP900Fcisa_csaf_ot

    Restrict access to port 5900/tcp to trusted IP addresses only

  • MitigationSIMATIC WinCC Runtime Advancedcisa_csaf_ot

    Restrict access to port 5900/tcp to trusted IP addresses only

  • No fix availableSINAMICS GH150siemens_psirt

    Currently no remediation is available

  • No fix availableSINAMICS GL150 (with option X30)siemens_psirt

    Currently no remediation is available

  • No fix availableSINAMICS GM150 (with option X30)siemens_psirt

    Currently no remediation is available

  • No fix availableSINAMICS SH150siemens_psirt

    Currently no remediation is available

  • No fix availableSINAMICS SL150siemens_psirt

    Currently no remediation is available

  • No fix availableSINAMICS SM120siemens_psirt

    Currently no remediation is available

  • No fix availableSINAMICS SM150siemens_psirt

    Currently no remediation is available

  • No fix availableSINAMICS SM150isiemens_psirt

    Currently no remediation is available

  • No fix availableSINAMICS GH150cisa_csaf_ot

    Currently no remediation is available

  • No fix availableSINAMICS GL150 (with option X30)cisa_csaf_ot

    Currently no remediation is available

  • No fix availableSINAMICS GM150 (with option X30)cisa_csaf_ot

    Currently no remediation is available

  • No fix availableSINAMICS SH150cisa_csaf_ot

    Currently no remediation is available

  • No fix availableSINAMICS SL150cisa_csaf_ot

    Currently no remediation is available

  • No fix availableSINAMICS SM120cisa_csaf_ot

    Currently no remediation is available

  • No fix availableSINAMICS SM150cisa_csaf_ot

    Currently no remediation is available

  • No fix availableSINAMICS SM150icisa_csaf_ot

    Currently no remediation is available

02

cvss

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

9.8
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.5–9.8

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4
v3.09.8criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 5.9
v3.09criticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · CISA US
v3.19.8criticalAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · FSTEC (BDU) RU
v3.19.8criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-125USprimaryCWE-787USprimaryCWE-125USCWE-787USCWE-788USCWE-788USCWE-788USCWE-788US
04

affected products (40)

Products and version ranges known to be affected.

showing 20 of 40
05

advisories (5)

Vendor and ecosystem advisories describing this.

  • SSA-286838SSA-286838: Multiple Vulnerabilities in SINAMICS Medium Voltage Products2021-05-11csaf · siemens_psirtDE

    SINAMICS medium voltage products, with Sm@rtServer enabled on SIMATIC comfort HMI Panels, are affected by multiple vulnerabilities that could allow an attacker, under certain conditions, to gain full remote access to the HMI. Note that by default Sm@rtServer is disabled, but it can be enabled by the system integrator on request. Siemens has released updates for the affected products, and recommends to update them to the latest version.

  • SSA-940818SSA-940818: UltraVNC Vulnerabilities in SIMATIC HMIs/WinCC Products2021-05-11csaf · siemens_psirtDE

    UltraVNC vulnerabilities in the affected products listed below could allow remote code execution, information disclosure and Denial-of-Service attacks under certain conditions. Siemens has released updates for the affected products and recommends to update to the latest versions.

  • ICSA-20-161-06Siemens SINUMERIK2020-06-09icsa · cisa_csaf_otUS

    As a general security measure, Siemens strongly recommends to protect network access to devices with appropriate mechanisms. In order to operate the devices in a protected IT environment, Siemens recommends to configure the environment according to Siemens' operational guidelines for Industrial Security (Download: https://www.siemens.com/cert/operational-guidelines-industrial-security), and to follow the recommendations in the product manuals.

  • ICSA-21-131-04Siemens SINAMICS Medium Voltage Products Remote Access (Update B)2021-05-11icsa · cisa_csaf_otUS

    SINAMICS medium voltage products, with Sm@rtServer enabled on SIMATIC comfort HMI Panels, are affected by multiple vulnerabilities that could allow an attacker, under certain conditions, to gain full remote access to the HMI. Note that by default Sm@rtServer is disabled, but it can be enabled by the system integrator on request. Siemens has released updates for the affected products, and recommends to update them to the latest version.

  • ICSA-21-131-11Siemens SIMATIC UltraVNC HMI WinCC Products2021-05-11icsa · cisa_csaf_otUS

    UltraVNC vulnerabilities in the affected products listed below could allow remote code execution, information disclosure and Denial-of-Service attacks under certain conditions. Siemens has released updates for the affected products and recommends to update to the latest versions.

06

also known as (4)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bducisa_csaf_otsiemens_psirtNVDCVE.orgMITRE
published 2019-03-08modified 2026-06-17
09

references (25)

External citations — patches, advisories, analysis.

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