How severe is CVE-2020-35608?

CVE-2020-35608 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-2020-35608 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35608?

CVE-2020-35608 affects Microsoft Azure Sphere. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-35608?

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-2020-35608 published?

CVE-2020-35608 was published on 2020-12-22 and last updated on 2026-06-17.

CVE-2020-35608

CVE-2020-35608 is a high-severity vulnerability in Microsoft Azure Sphere 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-74.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 7.2
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-74
Affected product: Microsoft Azure Sphere
Published: 2020-12-22
Last modified: 2026-06-17

Description

A code execution vulnerability exists in the normal world’s signed code execution functionality of Microsoft Azure Sphere 20.07. A specially crafted AF_PACKET socket can cause a process to create an executable memory mapping with controllable content. An attacker can execute a shellcode that uses the PACKET_MMAP functionality to trigger this vulnerability.

Frequently asked questions

What is CVE-2020-35608?: A code execution vulnerability exists in the normal world’s signed code execution functionality of Microsoft Azure Sphere 20.07. A specially crafted AF_PACKET socket can cause a process to create an executable memory mapping with controllable content. An attacker can execute a shellcode that uses the PACKET_MMAP functionality to trigger this vulnerability.
How severe is CVE-2020-35608?: CVE-2020-35608 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-2020-35608 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35608?: CVE-2020-35608 affects Microsoft Azure Sphere. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-35608?: 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-2020-35608 published?: CVE-2020-35608 was published on 2020-12-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microsoft:azure_sphere:20.07:*:*:*:*:*:*:*

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