How severe is CVE-2019-11867?

CVE-2019-11867 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2019-11867 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-11867?

CVE-2019-11867 affects Realtek Ndis. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-11867?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2019-11867 published?

CVE-2019-11867 was published on 2020-02-12 and last updated on 2026-06-17.

CVE-2019-11867

CVE-2019-11867 is a medium-severity vulnerability in Realtek Ndis with a CVSS 3.x base score of 5.5. 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-476.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 2.1
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Realtek Ndis
Published: 2020-02-12
Last modified: 2026-06-17

Description

Realtek NDIS driver rt640x64.sys, file version 10.1.505.2015, fails to do any size checking on an input buffer from user space, which the driver assumes has a size greater than zero bytes. To exploit this vulnerability, an attacker must send an IRP with a system buffer size of 0.

Frequently asked questions

What is CVE-2019-11867?: Realtek NDIS driver rt640x64.sys, file version 10.1.505.2015, fails to do any size checking on an input buffer from user space, which the driver assumes has a size greater than zero bytes. To exploit this vulnerability, an attacker must send an IRP with a system buffer size of 0.
How severe is CVE-2019-11867?: CVE-2019-11867 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2019-11867 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-11867?: CVE-2019-11867 affects Realtek Ndis. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-11867?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-11867 published?: CVE-2019-11867 was published on 2020-02-12 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:realtek:ndis:10.1.505.2015:*:*:*:*:*:*:*

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