How severe is CVE-2019-12263?

CVE-2019-12263 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-12263 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-12263?

CVE-2019-12263 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-2019-12263?

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-2019-12263 published?

CVE-2019-12263 was published on 2019-08-09 and last updated on 2026-06-17.

CVE-2019-12263

CVE-2019-12263 is a high-severity vulnerability in Windriver Vxworks with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-362.

Key facts

Severity: High (CVSS 3.x base score 8.1)
CVSS v2: 6.8
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-362
Affected product: Windriver Vxworks
Published: 2019-08-09
Last modified: 2026-06-17

Description

Wind River VxWorks 6.9.4 and vx7 has a Buffer Overflow in the TCP component (issue 4 of 4). There is an IPNET security vulnerability: TCP Urgent Pointer state confusion due to race condition.

Frequently asked questions

What is CVE-2019-12263?: Wind River VxWorks 6.9.4 and vx7 has a Buffer Overflow in the TCP component (issue 4 of 4). There is an IPNET security vulnerability: TCP Urgent Pointer state confusion due to race condition.
How severe is CVE-2019-12263?: CVE-2019-12263 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-12263 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-12263?: CVE-2019-12263 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-2019-12263?: 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-2019-12263 published?: CVE-2019-12263 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:*:*:*:*:*:*:*:*

More vulnerabilities in Windriver Vxworks

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CVE-2016-20009 — Critical (CVSS 9.8): A DNS client stack-based buffer overflow in ipdnsc_decode_name() affects Wind River VxWorks 6.5 through 7. NOTE: This…
CVE-2019-12262 — Critical (CVSS 9.8): Wind River VxWorks 6.6, 6.7, 6.8, 6.9 and 7 has Incorrect Access Control in the RARP client component. IPNET security…

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Other CWE-362 (Race Condition) vulnerabilities

CVE-2022-27626 — Critical (CVSS 10.0): A vulnerability regarding concurrent execution using shared resource with improper synchronization ('Race Condition')…
CVE-2015-8556 — Critical (CVSS 10.0): Local privilege escalation vulnerability in the Gentoo QEMU package before 2.5.0-r1.
CVE-2014-0703 — Critical (CVSS 10.0): Cisco Wireless LAN Controller (WLC) devices 7.4 before 7.4.110.0 distribute Aironet IOS software with a race condition…
CVE-2010-1228 — Critical (CVSS 10.0): Multiple race conditions in the sandbox infrastructure in Google Chrome before 4.1.249.1036 have unspecified impact and…
CVE-2008-6598 — Critical (CVSS 10.0): Multiple race conditions in WANPIPE before 3.3.6 have unknown impact and attack vectors related to "bri restart logic."
CVE-2026-46137 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: ADD_ADDR rtx: fix potential…

Browse all CWE-362 (Race Condition) vulnerabilities →