Public proof of conceptFix available

CVE-2019-12258

Q: Is CVE-2019-12258 actively exploited?

Active exploitation of CVE-2019-12258 has not been confirmed. Its EPSS score was 22.9% on 2026-11-02, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2019-12258?

CVE-2019-12258 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

A public proof of concept exists; no exploitation attested.

Published2019-08-09
WeaknessCWE-384

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Wind River VxWorks 6.6 through vx7 has Session Fixation in the TCP component. This is a IPNET security vulnerability: DoS of TCP connection via malformed TCP options.

Timeline

dates in UTC

2019-08-0920:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-11-03 09:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-12258?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-12258?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

SonicWall SonicOS

Branch	Affected	Fixed in	Source
5.9	≥ 5.9.0.0, ≤ 5.9.0.7	no fix published	NVD
5.9	≥ 5.9.1.0., ≤ 5.9.1.12	no fix published	NVD
6.2	≥ 6.2.0.0, ≤ 6.2.3.1	no fix published	NVD
6.2	≥ 6.2.4.0, ≤ 6.2.4.3	no fix published	NVD
6.2	≥ 6.2.5.0, ≤ 6.2.5.3	no fix published	NVD
6.2	≥ 6.2.6.0, ≤ 6.2.6.1	no fix published	NVD
6.2	≥ 6.2.7.0, ≤ 6.2.7.4	no fix published	NVD
6.2	≥ 6.2.9.0, ≤ 6.2.9.2	no fix published	NVD
6.5	≥ 6.5.0.0, ≤ 6.5.0.3	no fix published	NVD
6.5	≥ 6.5.1.0, ≤ 6.5.1.4	no fix published	NVD
6.5	≥ 6.5.2.0, ≤ 6.5.2.3	no fix published	NVD
6.5	≥ 6.5.3.0, ≤ 6.5.3.3	no fix published	NVD

Belden hirschmann hiosversion to verify

Branch	Affected	Fixed in	Source
7.0	≤ 07.0.07	no fix published	NVD
7.5	≤ 07.5.01	no fix published	NVD
7.2	≤ 07.2.04	no fix published	NVD
5.3	≤ 05.3.06	no fix published	NVD

Siemens siprotec 5 firmwareversion to verify

Branch	Affected	Fixed in	Source
7.91	< 7.91	7.91	NVD
7.59	< 7.59	7.59	NVD

9 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-23-320-10 CISA1 known affected
Siemens SIPROTEC 4 7SJ66
SIPROTEC 4 7SJ66
SSA-617233 Siemens ProductCERT1 known affected
SSA-617233: Urgent/11 TCP/IP Stack Vulnerabilities in SIPROTEC 4 7SJ66 Devices
SIPROTEC 4 7SJ66
ICSA-19-274-01 CISA8 known affected
Interpeak IPnet TCP/IP Stack (Update E)
ENEA OSE: OSE4 · ENEA OSE: OSE5 · Green Hills Software INTEGRITY RTOS: >=2003|<=2006 · +5 more
ICSMA-19-274-01 CISA9 known affected
Interpeak IPnet TCP/IP Stack (Update D)
OSE by ENEA, INTEGRITY RTOS by Green Hills Software, ITRON, ZebOS by IP Infusion, and VxWorks by Wind River - The Interpeak IPnet stack has been identified to be affected by CVE-2019-12255, CVE-2019-… · OSE by ENEA, INTEGRITY RTOS by Green Hills Software, ITRON, ZebOS by IP Infusion, and VxWorks by Wind River - ENEA reports that OSE4 and OSE5 may have been bundled with Interpeak IPnet from 2004-2006… · ENEA OSE 5 · +6 more
ICSA-19-211-01 CISA6 known affected
Wind River VxWorks (Update A)
Wind River VxWorks: 6.9.4.11 · Wind River VxWorks Vx7: SR540 · Wind River VxWorks Vx7: SR610 · +3 more

Full record on NVD

Fix

Vendor fix Siemens ProductCERT SSA-617233 · 1 productUpdate to V4.41 or later version
Vendor fix CISA ICSA-23-320-10 · 1 productUpdate to V4.41 or later version
Vendor fix CISA ICSMA-19-274-01 · 9 productsEnea has no IPNet customers on support contract in the United States.
Vendor fix CISA ICSMA-19-274-01 · 9 productsGreen Hills Software has proactively informed affected users and offers consulting services to implement mitigations.
Vendor fix CISA ICSMA-19-274-01 · 9 productsMicrosoft states they have no history of support or integration work to include IPnet and have not released a version of ThreadX bundled with IPnet. Microsoft does caution that some hardware makers could have used ThreadX and a custom set IPnet in the hardware.
Vendor fix CISA ICSMA-19-274-01 · 9 productsTRON Forum reports they only publish the specification for ITRON RTOS. Various implementations are used by many users world-wide and are created by various implementors (some commercial, and some academic and some government) according the specification document. TRON Forum, the caretaker of the IT…

Advisories and patches

support2.windriver.comVendor Advisory
support2.windriver.comVendor Advisory
www.windriver.comVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed
Metasploit modules: 1 moduleauxiliary/scanner/vxworks/urgent11_checkrank: normalModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.

Sources

NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
NVDweakness (CWE)CWE-384read 2026-10-23
FIRST EPSSEPSS score22.9 %read 2026-11-02
Metasploit FrameworkMetasploit modules1known since 2026-11-01

Identifiers

EUVD-2019-3900same flawENISA EUVD · LicenseRef-ENISA-legal-notice
auxiliary/scanner/vxworks/urgent11_checkexploit moduleMetasploit Framework © Rapid7 · BSD-3-Clause

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2019-08-09
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2019-12258?

Wind River VxWorks 6.6 through vx7 has Session Fixation in the TCP component. This is a IPNET security vulnerability: DoS of TCP connection via malformed TCP options.

Is CVE-2019-12258 actively exploited?

Active exploitation of CVE-2019-12258 has not been confirmed. Its EPSS score was 22.9% on 2026-11-02, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-12258?

CVE-2019-12258 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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Sources for this record

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