How severe is CVE-2021-35545?

CVE-2021-35545 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability high.

Is CVE-2021-35545 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-35545?

CVE-2021-35545 affects Oracle Vm Virtualbox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-35545?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-35545 published?

CVE-2021-35545 was published on 2021-10-20 and last updated on 2026-06-17.

CVE-2021-35545

CVE-2021-35545 is a medium-severity vulnerability in Oracle Vm Virtualbox with a CVSS 3.x base score of 6.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 3.x base score 6.7)
CVSS v2: 5.6
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Oracle Vm Virtualbox
Published: 2021-10-20
Last modified: 2026-06-17

Description

Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The supported version that is affected is Prior to 6.1.28. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. While the vulnerability is in Oracle VM VirtualBox, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle VM VirtualBox and unauthorized read access to a subset of Oracle VM VirtualBox accessible data. CVSS 3.1 Base Score 6.7 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:H).

Frequently asked questions

What is CVE-2021-35545?: Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). The supported version that is affected is Prior to 6.1.28. Easily exploitable vulnerability allows high privileged attacker with logon to the infrastructure where Oracle VM VirtualBox executes to compromise Oracle VM VirtualBox. While the vulnerability is in Oracle VM VirtualBox, attacks may significantly impact additional products. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle VM VirtualBox and unauthorized read access to a subset of Oracle VM VirtualBox accessible data. CVSS 3.1 Base Score 6.7 (Confidentiality and Availability impacts). CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:L/I:N/A:H).
How severe is CVE-2021-35545?: CVE-2021-35545 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability high.
Is CVE-2021-35545 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-35545?: CVE-2021-35545 affects Oracle Vm Virtualbox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-35545?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-35545 published?: CVE-2021-35545 was published on 2021-10-20 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:oracle:vm_virtualbox:*:*:*:*:*:*:*:*

More vulnerabilities in Oracle Vm Virtualbox

CVE-2015-8104 — Critical (CVSS 10.0): The KVM subsystem in the Linux kernel through 4.2.6, and Xen 4.3.x through 4.6.x, allows guest OS users to cause a…
CVE-2015-0235 — Critical (CVSS 10.0): Heap-based buffer overflow in the __nss_hostname_digits_dots function in glibc 2.2, and other 2.x versions before 2.18,…
CVE-2019-2725 — Critical (CVSS 9.8): Vulnerability in the Oracle WebLogic Server component of Oracle Fusion Middleware (subcomponent: Web Services).…
CVE-2016-5605 — Critical (CVSS 9.1): Unspecified vulnerability in the Oracle VM VirtualBox component before 5.1.4 in Oracle Virtualization allows remote…
CVE-2018-3294 — Critical (CVSS 9.0): Vulnerability in the Oracle VM VirtualBox component of Oracle Virtualization (subcomponent: Core). The supported…
CVE-2024-21115 — High (CVSS 8.8): Vulnerability in the Oracle VM VirtualBox product of Oracle Virtualization (component: Core). Supported versions that…

All CVEs affecting Oracle Vm Virtualbox →