How severe is CVE-2021-36924?

CVE-2021-36924 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-36924 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-36924?

CVE-2021-36924 affects Realtek Rtsupx Usb Utility Driver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-36924?

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-2021-36924 published?

CVE-2021-36924 was published on 2021-11-02 and last updated on 2026-06-17.

CVE-2021-36924

CVE-2021-36924 is a high-severity vulnerability in Realtek Rtsupx Usb Utility Driver with a CVSS 3.x base score of 7.8. 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-367.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 0% (10th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-367
Affected product: Realtek Rtsupx Usb Utility Driver
Published: 2021-11-02
Last modified: 2026-06-17

Description

RtsUpx.sys in Realtek RtsUpx USB Utility Driver for Camera/Hub/Audio through 1.14.0.0 allows local low-privileged users to achieve a pool overflow (leading to Escalation of Privileges, Denial of Service, and Code Execution) via a crafted Device IO Control packet to a device.

Frequently asked questions

What is CVE-2021-36924?: RtsUpx.sys in Realtek RtsUpx USB Utility Driver for Camera/Hub/Audio through 1.14.0.0 allows local low-privileged users to achieve a pool overflow (leading to Escalation of Privileges, Denial of Service, and Code Execution) via a crafted Device IO Control packet to a device.
How severe is CVE-2021-36924?: CVE-2021-36924 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-36924 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-36924?: CVE-2021-36924 affects Realtek Rtsupx Usb Utility Driver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-36924?: 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-2021-36924 published?: CVE-2021-36924 was published on 2021-11-02 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:realtek:rtsupx_usb_utility_driver:*:*:*:*:*:*:*:*

More vulnerabilities in Realtek Rtsupx Usb Utility Driver

CVE-2021-36925 — High (CVSS 7.8): RtsUpx.sys in Realtek RtsUpx USB Utility Driver for Camera/Hub/Audio through 1.14.0.0 allows local low-privileged users…
CVE-2021-36923 — High (CVSS 7.8): RtsUpx.sys in Realtek RtsUpx USB Utility Driver for Camera/Hub/Audio through 1.14.0.0 allows local low-privileged users…
CVE-2021-36922 — High (CVSS 7.8): RtsUpx.sys in Realtek RtsUpx USB Utility Driver for Camera/Hub/Audio through 1.14.0.0 allows local low-privileged users…

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