How severe is CVE-2021-35392?

CVE-2021-35392 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-2021-35392 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 83% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35392?

CVE-2021-35392 affects Realtek Rtl819x Jungle Software Development Kit. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-35392?

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-2021-35392 published?

CVE-2021-35392 was published on 2021-08-16 and last updated on 2026-06-17.

CVE-2021-35392

CVE-2021-35392 is a high-severity vulnerability in Realtek Rtl819x Jungle Software Development Kit with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 83% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.8
EPSS exploit prediction: 83% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Realtek Rtl819x Jungle Software Development Kit
Published: 2021-08-16
Last modified: 2026-06-17

Description

Realtek Jungle SDK version v2.x up to v3.4.14B provides a 'WiFi Simple Config' server that implements both UPnP and SSDP protocols. The binary is usually named wscd or mini_upnpd and is the successor to miniigd. The server is vulnerable to a heap buffer overflow that is present due to unsafe crafting of SSDP NOTIFY messages from received M-SEARCH messages ST header.

Frequently asked questions

What is CVE-2021-35392?: Realtek Jungle SDK version v2.x up to v3.4.14B provides a 'WiFi Simple Config' server that implements both UPnP and SSDP protocols. The binary is usually named wscd or mini_upnpd and is the successor to miniigd. The server is vulnerable to a heap buffer overflow that is present due to unsafe crafting of SSDP NOTIFY messages from received M-SEARCH messages ST header.
How severe is CVE-2021-35392?: CVE-2021-35392 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-2021-35392 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 83% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-35392?: CVE-2021-35392 affects Realtek Rtl819x Jungle Software Development Kit. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-35392?: 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-2021-35392 published?: CVE-2021-35392 was published on 2021-08-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:realtek:rtl819x_jungle_software_development_kit:*:*:*:*:*:*:*:*

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