How severe is CVE-2025-8301?

CVE-2025-8301 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-2025-8301 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-8301?

CVE-2025-8301 affects Realtek Wi-fi Usb Driver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-8301?

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.

Does CVE-2025-8301 have an EU (EUVD) identifier?

Yes. CVE-2025-8301 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-26433.

When was CVE-2025-8301 published?

CVE-2025-8301 was published on 2025-09-02 and last updated on 2026-06-17.

CVE-2025-8301

CVE-2025-8301 is a high-severity vulnerability in Realtek Wi-fi Usb 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-122.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-26433
Weakness: CWE-122
Affected product: Realtek Wi-fi Usb Driver
Published: 2025-09-02
Last modified: 2026-06-17

Description

Realtek RTL8811AU rtwlanu.sys N6CSet_DOT11_CIPHER_DEFAULT_KEY Heap-based Buffer Overflow Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Realtek RTL8811AU drivers. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the N6CSet_DOT11_CIPHER_DEFAULT_KEY function. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-24786.

Frequently asked questions

What is CVE-2025-8301?: Realtek RTL8811AU rtwlanu.sys N6CSet_DOT11_CIPHER_DEFAULT_KEY Heap-based Buffer Overflow Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Realtek RTL8811AU drivers. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the N6CSet_DOT11_CIPHER_DEFAULT_KEY function. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-24786.
How severe is CVE-2025-8301?: CVE-2025-8301 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-2025-8301 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-8301?: CVE-2025-8301 affects Realtek Wi-fi Usb Driver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-8301?: 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.
Does CVE-2025-8301 have an EU (EUVD) identifier?: Yes. CVE-2025-8301 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-26433.
When was CVE-2025-8301 published?: CVE-2025-8301 was published on 2025-09-02 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-25-880/

Affected products (1)

cpe:2.3:a:realtek:wi-fi_usb_driver:*:*:*:*:*:windows:*:*

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