How severe is CVE-2020-27950?

CVE-2020-27950 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-27950 being actively exploited?

Yes. CVE-2020-27950 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2020-27950?

CVE-2020-27950 primarily affects Apple Ipados. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-27950?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2020-27950 have an EU (EUVD) identifier?

Yes. CVE-2020-27950 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-20443. It is also flagged as exploited in the EUVD (since 2021-11-03).

When was CVE-2020-27950 published?

CVE-2020-27950 was published on 2020-12-08 and last updated on 2026-06-17.

CVE-2020-27950

CVE-2020-27950 is a medium-severity vulnerability in Apple Ipados with a CVSS 3.x base score of 5.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2021-11-03). The underlying weakness is classified as CWE-665.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
CVSS v2: 7.1
EPSS exploit prediction: 17% (97th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2021-11-03)
EU (EUVD) id: EUVD-2020-20443
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2021-11-03)
Weakness: CWE-665
Affected product: Apple Ipados
Published: 2020-12-08
Last modified: 2026-06-17

Description

A memory initialization issue was addressed. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS 14.2 and iPadOS 14.2, watchOS 5.3.9, macOS Catalina 10.15.7 Supplemental Update, macOS Catalina 10.15.7 Update. A malicious application may be able to disclose kernel memory.

Frequently asked questions

What is CVE-2020-27950?: A memory initialization issue was addressed. This issue is fixed in macOS Big Sur 11.0.1, watchOS 7.1, iOS 12.4.9, watchOS 6.2.9, Security Update 2020-006 High Sierra, Security Update 2020-006 Mojave, iOS 14.2 and iPadOS 14.2, watchOS 5.3.9, macOS Catalina 10.15.7 Supplemental Update, macOS Catalina 10.15.7 Update. A malicious application may be able to disclose kernel memory.
How severe is CVE-2020-27950?: CVE-2020-27950 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-27950 being actively exploited?: Yes. CVE-2020-27950 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2020-27950?: CVE-2020-27950 primarily affects Apple Ipados. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-27950?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2020-27950 have an EU (EUVD) identifier?: Yes. CVE-2020-27950 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-20443. It is also flagged as exploited in the EUVD (since 2021-11-03).
When was CVE-2020-27950 published?: CVE-2020-27950 was published on 2020-12-08 and last updated on 2026-06-17.

References

Affected products (4)

cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*
cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

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