How severe is CVE-2020-23539?

CVE-2020-23539 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-23539 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-23539?

CVE-2020-23539 affects Realtek Rtl8723de Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-23539?

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-2020-23539 published?

CVE-2020-23539 was published on 2021-04-08 and last updated on 2026-06-17.

CVE-2020-23539

CVE-2020-23539 is a high-severity vulnerability in Realtek Rtl8723de Firmware with a CVSS 3.x base score of 7.5. 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: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 2% (76th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Realtek Rtl8723de Firmware
Published: 2021-04-08
Last modified: 2026-06-17

Description

An issue was discovered in Realtek rtl8723de BLE Stack <= 4.1 that allows remote attackers to cause a Denial of Service via the interval field to the CONNECT_REQ message.

Frequently asked questions

What is CVE-2020-23539?: An issue was discovered in Realtek rtl8723de BLE Stack <= 4.1 that allows remote attackers to cause a Denial of Service via the interval field to the CONNECT_REQ message.
How severe is CVE-2020-23539?: CVE-2020-23539 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-23539 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (76th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-23539?: CVE-2020-23539 affects Realtek Rtl8723de Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-23539?: 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-2020-23539 published?: CVE-2020-23539 was published on 2021-04-08 and last updated on 2026-06-17.

References

https://github.com/pokerfacett/MY_REQUEST/blob/df73fe140655ea44542b03ac186e6c2b47e97540/Realtek%208723ds%20BLE%20SDK%20denial%20of%20service%20attack.md

Affected products (1)

cpe:2.3:o:realtek:rtl8723de_firmware:*:*:*:*:*:*:*:*

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