CVE-2018-12086

High severity vulnerability that affects OPCFoundation.NetStandard.Opc.Ua

7.5 HighPublic exploitFix available

Buffer overflow in OPC UA applications allows remote attackers to trigger a stack overflow with carefully structured requests.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

11.8%Up 5.2 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

Buffer overflow in OPC UA applications allows remote attackers to trigger a stack overflow with carefully structured requests.

Record: CVE-2018-12086
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness: CWE-787
Updated: 2026-11-02

CVE List No score

Buffer overflow in OPC UA applications allows remote attackers to trigger a stack overflow with carefully structured requests.

Record: CVE-2018-12086
Updated: 2026-11-02

EUVDEUVD-2018-0535 No score

Buffer overflow in OPC UA applications allows remote attackers to trigger a stack overflow with carefully structured requests.

Record: EUVD-2018-0535
Updated: 2026-11-03

GitHub AdvisoriesGHSA-782p-53wq-cxmj 7.5

High severity vulnerability that affects OPCFoundation.NetStandard.Opc.Ua

Buffer overflow in OPC UA applications allows remote attackers to trigger a stack overflow with carefully structured requests.

Record: GHSA-782p-53wq-cxmj
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-787
Updated: 2026-11-02

OSV 7.5

Buffer overflow in OPC UA applications allows remote attackers to trigger a stack overflow with carefully structured requests.

Record: CVE-2018-12086
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2018-12086 7.5

Buffer overflow in OPC UA applications allows remote attackers to trigger a stack overflow with carefully structured requests.

Record: DEBIAN-CVE-2018-12086
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

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OSVGHSA-782p-53wq-cxmj 7.5

High severity vulnerability that affects OPCFoundation.NetStandard.Opc.Ua

Buffer overflow in OPC UA applications allows remote attackers to trigger a stack overflow with carefully structured requests.

Record: GHSA-782p-53wq-cxmj
CVSS 3.0: 7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-787
Updated: 2026-11-02

OSVopenSUSE-SU-2020:0362-1 No score

Security update for wireshark

This update for wireshark and libmaxminddb fixes the following issues:

Update wireshark to new major version 3.2.2 and introduce libmaxminddb for GeoIP support (bsc#1156288).

New features include:

Added support for 111 new protocols, including WireGuard, LoRaWAN, TPM 2.0, 802.11ax and QUIC
Improved support for existing protocols, like HTTP/2
Improved analytics and usability functionalities

This update was imported from the SUSE:SLE-15:Update update project.

Record: openSUSE-SU-2020:0362-1
Updated: 2026-11-02

OSVopenSUSE-SU-2024:11513-1 No score

libwireshark14-3.4.8-1.2 on GA media

These are all security issues fixed in the libwireshark14-3.4.8-1.2 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2024:11513-1
Updated: 2026-11-02

OSVSUSE-SU-2018:3282-1 No score

Security update for wireshark

This update for wireshark fixes the following issues:

Wireshark was updated to 2.4.10 (bsc#1111647).

Following security issues were fixed:

CVE-2018-18227: MS-WSP dissector crash (wnpa-sec-2018-47)
CVE-2018-12086: OpcUA dissector crash (wnpa-sec-2018-50)

Further bug fixes and updated protocol support that were done are listed in:

https://www.wireshark.org/docs/relnotes/wireshark-2.4.10.html

Record: SUSE-SU-2018:3282-1
Updated: 2026-11-02

OSVSUSE-SU-2018:3590-1 No score

Security update for wireshark

This update for wireshark fixes the following issues:

Wireshark was updated to 2.4.10 (bsc#1111647).

Following security issues were fixed:

CVE-2018-18227: MS-WSP dissector crash (wnpa-sec-2018-47)
CVE-2018-12086: OpcUA dissector crash (wnpa-sec-2018-50)

Further bug fixes and updated protocol support that were done are listed in:

https://www.wireshark.org/docs/relnotes/wireshark-2.4.10.html

Record: SUSE-SU-2018:3590-1
Updated: 2026-11-02

OSVSUSE-SU-2018:3590-2 No score

Security update for wireshark

This update for wireshark fixes the following issues:

Wireshark was updated to 2.4.10 (bsc#1111647).

Following security issues were fixed:

CVE-2018-18227: MS-WSP dissector crash (wnpa-sec-2018-47)
CVE-2018-12086: OpcUA dissector crash (wnpa-sec-2018-50)

Further bug fixes and updated protocol support that were done are listed in:

https://www.wireshark.org/docs/relnotes/wireshark-2.4.10.html

Record: SUSE-SU-2018:3590-2
Updated: 2026-11-02

OSVSUSE-SU-2018:3590-3 No score

Security update for wireshark

This update for wireshark fixes the following issues:

Wireshark was updated to 2.4.10 (bsc#1111647).

Following security issues were fixed:

CVE-2018-18227: MS-WSP dissector crash (wnpa-sec-2018-47)
CVE-2018-12086: OpcUA dissector crash (wnpa-sec-2018-50)

Further bug fixes and updated protocol support that were done are listed in:

https://www.wireshark.org/docs/relnotes/wireshark-2.4.10.html

Record: SUSE-SU-2018:3590-3
Updated: 2026-11-02

OSVSUSE-SU-2020:0693-1 No score

Security update for wireshark

This update for wireshark and libmaxminddb fixes the following issues:

Update wireshark to new major version 3.2.2 and introduce libmaxminddb for GeoIP support (bsc#1156288).

New features include:

Added support for 111 new protocols, including WireGuard, LoRaWAN, TPM 2.0, 802.11ax and QUIC
Improved support for existing protocols, like HTTP/2
Improved analytics and usability functionalities

Record: SUSE-SU-2020:0693-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`OPCFoundation.NetStandard.Opc.Ua` NuGet	through 1.4.352.12	1.4.353.15
`wireshark` Debian:12	before 2.6.4-1	2.6.4-1
`wireshark` Debian:13	before 2.6.4-1	2.6.4-1
`wireshark` Debian:14	before 2.6.4-1	2.6.4-1
`wireshark` Debian:9 From an advisory covering 11 CVEs	before 2.6.5-1~deb9u1, plus listed versions 2.2.6+g32dac6a-22.2.6+g32dac6a-2+deb9u12.2.6+g32dac6a-2+deb9u22.2.6+g32dac6a-2+deb9u32.2.7-1 Show 14 moreShow less 2.4.0-12.4.1-12.4.2-12.4.3-12.4.4-12.4.5-12.4.6-12.6.1-12.6.2-12.6.2-22.6.3-12.6.3-1~deb9u12.6.4-12.6.4-2	2.6.5-1~deb9u1
`OPCFoundation.NetStandard.Opc.Ua` NuGet	before 1.4.353.15, plus listed versions 0.4.00.4.10.4.30.4.40.4.5 Show 15 moreShow less 1.3.3481.3.3491.3.3501.3.350.11.3.350.31.3.350.41.3.350.51.3.350.61.3.351.71.3.352.101.3.352.111.3.352.121.3.352.91.4.353.131.4.353.14	1.4.353.15
`wireshark` SUSE:Linux Enterprise Module for Basesystem 15 From an advisory covering 2 CVEs	before 2.4.10-3.12.2	2.4.10-3.12.2
`wireshark` SUSE:Linux Enterprise Module for Desktop Applications 15 From an advisory covering 2 CVEs	before 2.4.10-3.12.2	2.4.10-3.12.2
`wireshark` SUSE:OpenStack Cloud 7 From an advisory covering 2 CVEs	before 2.4.10-48.32.1	2.4.10-48.32.1
`wireshark` SUSE:Linux Enterprise Desktop 12 SP3 From an advisory covering 2 CVEs	before 2.4.10-48.32.1	2.4.10-48.32.1

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Affected packages
Package	Affected	Fixed
`wireshark` SUSE:Linux Enterprise Server for SAP Applications 12 SP2 From an advisory covering 2 CVEs	before 2.4.10-48.32.1	2.4.10-48.32.1
`wireshark` SUSE:Linux Enterprise Software Development Kit 12 SP3 From an advisory covering 2 CVEs	before 2.4.10-48.32.1	2.4.10-48.32.1
`wireshark` SUSE:Linux Enterprise Server 12-LTSS From an advisory covering 2 CVEs	before 2.4.10-48.32.1	2.4.10-48.32.1
`wireshark` SUSE:Linux Enterprise Server 12 SP1-LTSS From an advisory covering 2 CVEs	before 2.4.10-48.32.1	2.4.10-48.32.1
`wireshark` SUSE:Linux Enterprise Server 12 SP2-LTSS From an advisory covering 2 CVEs	before 2.4.10-48.32.1	2.4.10-48.32.1
`wireshark` SUSE:Linux Enterprise Server 12 SP2-BCL From an advisory covering 2 CVEs	before 2.4.10-48.32.1	2.4.10-48.32.1
`wireshark` SUSE:Linux Enterprise Server 12 SP3 From an advisory covering 2 CVEs	before 2.4.10-48.32.1	2.4.10-48.32.1
`wireshark` SUSE:Linux Enterprise Server for SAP Applications 12 SP3 From an advisory covering 2 CVEs	before 2.4.10-48.32.1	2.4.10-48.32.1
`wireshark` SUSE:Enterprise Storage 4 From an advisory covering 2 CVEs	before 2.4.10-48.32.1	2.4.10-48.32.1
`wireshark` SUSE:Linux Enterprise Desktop 12 SP4 From an advisory covering 2 CVEs	before 2.4.10-48.32.1	2.4.10-48.32.1
`wireshark` SUSE:Linux Enterprise Software Development Kit 12 SP4 From an advisory covering 2 CVEs	before 2.4.10-48.32.1	2.4.10-48.32.1
`wireshark` SUSE:Linux Enterprise Server 12 SP4 From an advisory covering 2 CVEs	before 2.4.10-48.32.1	2.4.10-48.32.1
`wireshark` SUSE:Linux Enterprise Server for SAP Applications 12 SP4 From an advisory covering 2 CVEs	before 2.4.10-48.32.1	2.4.10-48.32.1
`wireshark` SUSE:Linux Enterprise Server for SAP Applications 12 SP1 From an advisory covering 2 CVEs	before 2.4.10-48.32.1	2.4.10-48.32.1
`libmaxminddb` SUSE:Linux Enterprise Module for Basesystem 15 SP1 From an advisory covering 59 CVEs	before 1.4.2-1.3.1	1.4.2-1.3.1
`spandsp` SUSE:Linux Enterprise Module for Basesystem 15 SP1 From an advisory covering 59 CVEs	before 0.0.6-3.2.1	0.0.6-3.2.1
`wireshark` SUSE:Linux Enterprise Module for Basesystem 15 SP1 From an advisory covering 59 CVEs	before 3.2.2-3.35.2	3.2.2-3.35.2
`spandsp` SUSE:Linux Enterprise Module for Desktop Applications 15 SP1 From an advisory covering 59 CVEs	before 0.0.6-3.2.1	0.0.6-3.2.1
`wireshark` SUSE:Linux Enterprise Module for Desktop Applications 15 SP1 From an advisory covering 59 CVEs	before 3.2.2-3.35.2	3.2.2-3.35.2
`libmaxminddb` SUSE:Linux Enterprise High Performance Computing 15-ESPOS From an advisory covering 59 CVEs	before 1.4.2-1.3.1	1.4.2-1.3.1
`spandsp` SUSE:Linux Enterprise High Performance Computing 15-ESPOS From an advisory covering 59 CVEs	before 0.0.6-3.2.1	0.0.6-3.2.1
`wireshark` SUSE:Linux Enterprise High Performance Computing 15-ESPOS From an advisory covering 59 CVEs	before 3.2.2-3.35.2	3.2.2-3.35.2
`libmaxminddb` SUSE:Linux Enterprise High Performance Computing 15-LTSS From an advisory covering 59 CVEs	before 1.4.2-1.3.1	1.4.2-1.3.1
`spandsp` SUSE:Linux Enterprise High Performance Computing 15-LTSS From an advisory covering 59 CVEs	before 0.0.6-3.2.1	0.0.6-3.2.1
`wireshark` SUSE:Linux Enterprise High Performance Computing 15-LTSS From an advisory covering 59 CVEs	before 3.2.2-3.35.2	3.2.2-3.35.2
`libmaxminddb` SUSE:Linux Enterprise Server 15-LTSS From an advisory covering 59 CVEs	before 1.4.2-1.3.1	1.4.2-1.3.1
`spandsp` SUSE:Linux Enterprise Server 15-LTSS From an advisory covering 59 CVEs	before 0.0.6-3.2.1	0.0.6-3.2.1
`wireshark` SUSE:Linux Enterprise Server 15-LTSS From an advisory covering 59 CVEs	before 3.2.2-3.35.2	3.2.2-3.35.2
`libmaxminddb` SUSE:Linux Enterprise Server for SAP Applications 15 From an advisory covering 59 CVEs	before 1.4.2-1.3.1	1.4.2-1.3.1
`spandsp` SUSE:Linux Enterprise Server for SAP Applications 15 From an advisory covering 59 CVEs	before 0.0.6-3.2.1	0.0.6-3.2.1
`wireshark` SUSE:Linux Enterprise Server for SAP Applications 15 From an advisory covering 59 CVEs	before 3.2.2-3.35.2	3.2.2-3.35.2
`libmaxminddb` openSUSE:Leap 15.1 From an advisory covering 59 CVEs	before 1.4.2-lp151.3.3.1	1.4.2-lp151.3.3.1
`spandsp` openSUSE:Leap 15.1 From an advisory covering 59 CVEs	before 0.0.6-lp151.3.3.1	0.0.6-lp151.3.3.1
`wireshark` openSUSE:Leap 15.1 From an advisory covering 59 CVEs	before 3.2.2-lp151.2.9.1	3.2.2-lp151.2.9.1
`wireshark` openSUSE:Tumbleweed From an advisory covering 163 CVEs	before 3.4.8-1.2	3.4.8-1.2

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
PoC in GitHub	kevinherron/stack-overflow-poc	2019-02-20

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-12086 is a high vulnerability (CVSS 7.5) in Debian Linux, published September 14, 2018. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 11.8%, the 96th percentile. Fixed in OPCFoundation.NetStandard.Opc.Ua 1.4.353.15.

References

Show 194 moreShow less

This page doesn't list everything

Left out here: 11 references. The JSON record has them.