CVE-2019-12255

Exp

Wind River VxWorks has a Buffer Overflow in the TCP component (issue 1 of 4). This is a IPNET security vulnerability: TCP Urgent Pointer = 0 that leads to an integer underflow.

Published: 2019-08-09 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-12255 is rated High Exploit Risk (84/100): CVSS Critical severity, with high exploitation likelihood (EPSS 75.25%, 99th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2019-12255

EDB-ID Source Kind Published Link
47233 exploit_db edb 2019-08-12 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2019-12255

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 82.22% 75.25% -6.97%
2 2026-05-28 80.23% 82.22% +1.98%
3 2026-05-25 — 80.23% —

Full EPSS history (54 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-12255

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
7.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 6.4 [email protected]

Weakness enumeration for CVE-2019-12255

Affected software / configurations for CVE-2019-12255

Vendor Product Version Raw CPE
windriver vxworks >= 6.5, < 6.9.4 cpe:2.3:o:windriver:vxworks:*:*:*:*:*:*:*:*
netapp e-series_santricity_os_controller >= 8.00, <= 8.40.50.00 cpe:2.3:o:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:*
sonicwall sonicos >= 5.9.0.0, <= 5.9.0.7 cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos >= 5.9.1.0., <= 5.9.1.12 cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos >= 6.2.0.0, <= 6.2.3.1 cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos >= 6.2.4.0, <= 6.2.4.3 cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos >= 6.2.5.0, <= 6.2.5.3 cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos >= 6.2.6.0, <= 6.2.6.1 cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos >= 6.2.7.0, <= 6.2.7.4 cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos >= 6.2.9.0, <= 6.2.9.2 cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos >= 6.5.0.0, <= 6.5.0.3 cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos >= 6.5.1.0, <= 6.5.1.4 cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos >= 6.5.2.0, <= 6.5.2.3 cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos >= 6.5.3.0, <= 6.5.3.3 cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos >= 6.5.4.0., <= 6.5.4.3 cpe:2.3:o:sonicwall:sonicos:*:*:*:*:*:*:*:*
sonicwall sonicos 6.2.7.0 cpe:2.3:o:sonicwall:sonicos:6.2.7.0:*:*:*:*:*:*:*
sonicwall sonicos 6.2.7.1 cpe:2.3:o:sonicwall:sonicos:6.2.7.1:*:*:*:*:*:*:*
sonicwall sonicos 6.2.7.7 cpe:2.3:o:sonicwall:sonicos:6.2.7.7:*:*:*:*:*:*:*
siemens siprotec_5_firmware < 7.91 cpe:2.3:o:siemens:siprotec_5_firmware:*:*:*:*:*:*:*:cp300
siemens siprotec_5_firmware — cpe:2.3:o:siemens:siprotec_5_firmware:*:*:*:*:*:*:*:cp200
siemens siprotec_5_firmware — cpe:2.3:o:siemens:siprotec_5_firmware:*:*:*:*:*:*:*:cp300
siemens power_meter_9410_firmware < 2.2.1 cpe:2.3:o:siemens:power_meter_9410_firmware:*:*:*:*:*:*:*:*
siemens power_meter_9810_firmware — cpe:2.3:o:siemens:power_meter_9810_firmware:*:*:*:*:*:*:*:*
siemens ruggedcom_win7000_firmware < bs5.2.461.17 cpe:2.3:o:siemens:ruggedcom_win7000_firmware:*:*:*:*:*:*:*:*
siemens ruggedcom_win7018_firmware < bs5.2.461.17 cpe:2.3:o:siemens:ruggedcom_win7018_firmware:*:*:*:*:*:*:*:*
siemens ruggedcom_win7025_firmware < bs5.2.461.17 cpe:2.3:o:siemens:ruggedcom_win7025_firmware:*:*:*:*:*:*:*:*
siemens ruggedcom_win7200_firmware < bs5.2.461.17 cpe:2.3:o:siemens:ruggedcom_win7200_firmware:*:*:*:*:*:*:*:*
belden hirschmann_hios <= 07.0.07 cpe:2.3:o:belden:hirschmann_hios:*:*:*:*:*:*:*:*
belden hirschmann_hios <= 07.5.01 cpe:2.3:o:belden:hirschmann_hios:*:*:*:*:*:*:*:*
belden hirschmann_hios <= 07.2.04 cpe:2.3:o:belden:hirschmann_hios:*:*:*:*:*:*:*:*
belden hirschmann_hios <= 05.3.06 cpe:2.3:o:belden:hirschmann_hios:*:*:*:*:*:*:*:*
belden garrettcom_magnum_dx940e_firmware <= 1.0.1_y7 cpe:2.3:o:belden:garrettcom_magnum_dx940e_firmware:*:*:*:*:*:*:*:*

References for CVE-2019-12255

URL Tags
http://packetstormsecurity.com/files/154022/VxWorks-6.8-Integer-Underflow.html Exploit Third Party Advisory VDB Entry
https://cert-portal.siemens.com/productcert/pdf/ssa-189842.pdf Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-352504.pdf Third Party Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-632562.pdf Third Party Advisory
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2019-0009 Third Party Advisory
https://security.netapp.com/advisory/ntap-20190802-0001/ Third Party Advisory
https://support.f5.com/csp/article/K41190253 Third Party Advisory
https://support.f5.com/csp/article/K41190253?utm_source=f5support&amp%3Butm_medium=RSS
https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2019-12255 Vendor Advisory
https://support2.windriver.com/index.php?page=security-notices Issue Tracking Vendor Advisory
https://www.windriver.com/security/announcements/tcp-ip-network-stack-ipnet-urgent11/ Vendor Advisory
cvelogic Threat Intelligence