CVE-2019-15681

mediumpriority · track · 31EPSS 0.029 · 87 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

2.91% (87th) EPSS

CVSS 5 · medium

Is it mine?

42 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

LibVNC commit before d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a contains a memory leak (CWE-655) in VNC server code, which allow an attacker to read stack memory and can be abused for information disclosure. Combined with another vulnerability, it can be used to leak stack memory and bypass ASLR. This attack appear to be exploitable via network connectivity. These vulnerabilities have been fixed in commit d01e1bb4246323ba6fcee3b82ef1faa9b1dac82a.

remediations

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

A vendor fix is available.

FixedSIMATIC ITC1500 V3siemens_psirt
Update to V3.2.1.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109804128/
FixedSIMATIC ITC1500 V3 PROsiemens_psirt
Update to V3.2.1.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109804128/
FixedSIMATIC ITC1900 V3siemens_psirt
Update to V3.2.1.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109804128/
FixedSIMATIC ITC1900 V3 PROsiemens_psirt
Update to V3.2.1.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109804128/
FixedSIMATIC ITC2200 V3siemens_psirt
Update to V3.2.1.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109804128/
FixedSIMATIC ITC2200 V3 PROsiemens_psirt
Update to V3.2.1.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109804128/
FixedSIMATIC ITC1500 V3cisa_csaf_ot
Update to V3.2.1.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109804128/
FixedSIMATIC ITC1500 V3 PROcisa_csaf_ot
Update to V3.2.1.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109804128/
FixedSIMATIC ITC1900 V3cisa_csaf_ot
Update to V3.2.1.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109804128/
FixedSIMATIC ITC1900 V3 PROcisa_csaf_ot
Update to V3.2.1.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109804128/
FixedSIMATIC ITC2200 V3cisa_csaf_ot
Update to V3.2.1.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109804128/
FixedSIMATIC ITC2200 V3 PROcisa_csaf_ot
Update to V3.2.1.0 or later version
https://support.industry.siemens.com/cs/ww/en/view/109804128/
MitigationSIMATIC ITC1500 V3siemens_psirt
Monitor and restrict access to port 5900/tcp to trusted IP addresses only
MitigationSIMATIC ITC1500 V3 PROsiemens_psirt
Monitor and restrict access to port 5900/tcp to trusted IP addresses only
MitigationSIMATIC ITC1900 V3siemens_psirt
Monitor and restrict access to port 5900/tcp to trusted IP addresses only
MitigationSIMATIC ITC1900 V3 PROsiemens_psirt
Monitor and restrict access to port 5900/tcp to trusted IP addresses only
MitigationSIMATIC ITC2200 V3siemens_psirt
Monitor and restrict access to port 5900/tcp to trusted IP addresses only
MitigationSIMATIC ITC2200 V3 PROsiemens_psirt
Monitor and restrict access to port 5900/tcp to trusted IP addresses only
MitigationSIMATIC ITC1500 V3cisa_csaf_ot
Monitor and restrict access to port 5900/tcp to trusted IP addresses only
MitigationSIMATIC ITC1500 V3 PROcisa_csaf_ot
Monitor and restrict access to port 5900/tcp to trusted IP addresses only
MitigationSIMATIC ITC1900 V3cisa_csaf_ot
Monitor and restrict access to port 5900/tcp to trusted IP addresses only
MitigationSIMATIC ITC1900 V3 PROcisa_csaf_ot
Monitor and restrict access to port 5900/tcp to trusted IP addresses only
MitigationSIMATIC ITC2200 V3cisa_csaf_ot
Monitor and restrict access to port 5900/tcp to trusted IP addresses only
MitigationSIMATIC ITC2200 V3 PROcisa_csaf_ot
Monitor and restrict access to port 5900/tcp to trusted IP addresses only

cvss

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

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5–7.5

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:Csecondary · CISA US

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:Csecondary · Siemens ProductCERT DE

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-665USprimaryCWE-665USCWE-665USCWE-665USCWE-772US

affected products (42)

Products and version ranges known to be affected.

SIMATIC ITC1500 V3all versionscisa_csaf_otUS
SIMATIC ITC1500 V3 PROall versionscisa_csaf_otUS
SIMATIC ITC1900 V3all versionscisa_csaf_otUS
SIMATIC ITC1900 V3 PROall versionscisa_csaf_otUS
SIMATIC ITC2200 V3all versionscisa_csaf_otUS
SIMATIC ITC2200 V3 PROall versionscisa_csaf_otUS
Siemens SIMATIC ITC1500 V3< V3.2.1.0cisa_csaf_otUS
Siemens SIMATIC ITC1500 V3 PRO< V3.2.1.0cisa_csaf_otUS
Siemens SIMATIC ITC1900 V3< V3.2.1.0cisa_csaf_otUS
Siemens SIMATIC ITC1900 V3 PRO< V3.2.1.0cisa_csaf_otUS
Siemens SIMATIC ITC2200 V3< V3.2.1.0cisa_csaf_otUS
Siemens SIMATIC ITC2200 V3 PRO< V3.2.1.0cisa_csaf_otUS
Kaspersky LibVNC≤ 0.9.12enisa_euvdEU
Novell Inc. OpenSUSE Leap≤ 15.1fstec_bduRU
АО «Концерн ВНИИНС» ОС ОН «Стрелец»≤ 16.01.2023fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Common Edition≤ 2.12 «Орёл»fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 1.7fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 1.6 «Смоленск»fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition для «Эльбрус»≤ 8.1 «Ленинград»fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 9fstec_bduRU

showing 20 of 42

advisories (2)

Vendor and ecosystem advisories describing this.

SSA-390195SSA-390195: LibVNC Vulnerabilities in SIMATIC ITC Products2021-12-14csaf · siemens_psirtDE
Multiple LibVNC 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-21-350-12Siemens SIMATIC ITC2021-12-14icsa · cisa_csaf_otUS
Multiple LibVNC 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.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisa_csaf_ot siemens_psirt NVD CVE.org MITRE

published 2019-10-29modified 2026-06-17

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references (54)

External citations — patches, advisories, analysis.

scry

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