How severe is CVE-2019-12258?

CVE-2019-12258 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-12258 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 23% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-12258?

CVE-2019-12258 primarily affects Windriver Vxworks. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-12258?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-12258 published?

CVE-2019-12258 was published on 2019-08-09 and last updated on 2026-06-17.

CVE-2019-12258

CVE-2019-12258 is a high-severity vulnerability in Windriver Vxworks with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 23% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-384.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 23% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-384
Affected product: Windriver Vxworks
Published: 2019-08-09
Last modified: 2026-06-17

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.

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.
How severe is CVE-2019-12258?: CVE-2019-12258 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-12258 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 23% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-12258?: CVE-2019-12258 primarily affects Windriver Vxworks. In total, 17 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-12258?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-12258 published?: CVE-2019-12258 was published on 2019-08-09 and last updated on 2026-06-17.

References

Affected products (17)

cpe:2.3:o:windriver:vxworks:*:*:*:*:*:*:*:*
cpe:2.3:o:windriver:vxworks:7.0:-:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sonicos:6.2.7.0:*:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sonicos:6.2.7.1:*:*:*:*:*:*:*
cpe:2.3:o:sonicwall:sonicos:6.2.7.7:*:*:*:*:*:*:*
cpe:2.3:o:siemens:siprotec_5_firmware:*:*:*:*:*:*:*:cp200
cpe:2.3:o:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:siprotec_5_firmware:*:*:*:*:*:*:*:cp300
cpe:2.3:o:siemens:power_meter_9410_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:power_meter_9810_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_win7000_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_win7018_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_win7025_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:siemens:ruggedcom_win7200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:belden:hirschmann_hios:*:*:*:*:*:*:*:*
cpe:2.3:o:belden:garrettcom_magnum_dx940e_firmware:*:*:*:*:*:*:*:*

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