How severe is CVE-2023-42124?

CVE-2023-42124 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-2023-42124 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-42124?

CVE-2023-42124 affects Avast Premium Security. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-42124?

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.

Does CVE-2023-42124 have an EU (EUVD) identifier?

Yes. CVE-2023-42124 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-46583.

When was CVE-2023-42124 published?

CVE-2023-42124 was published on 2024-05-03 and last updated on 2026-06-17.

CVE-2023-42124

CVE-2023-42124 is a high-severity vulnerability in Avast Premium Security 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-863.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (20th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2023-46583
Weakness: CWE-863
Affected product: Avast Premium Security
Published: 2024-05-03
Last modified: 2026-06-17

Description

Avast Premium Security Sandbox Protection Incorrect Authorization Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Avast Premium Security. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the implementation of the sandbox feature. The issue results from incorrect authorization. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code outside the sandbox at medium integrity. . Was ZDI-CAN-20178.

Frequently asked questions

What is CVE-2023-42124?: Avast Premium Security Sandbox Protection Incorrect Authorization Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Avast Premium Security. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the implementation of the sandbox feature. The issue results from incorrect authorization. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code outside the sandbox at medium integrity. . Was ZDI-CAN-20178.
How severe is CVE-2023-42124?: CVE-2023-42124 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-2023-42124 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-42124?: CVE-2023-42124 affects Avast Premium Security. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-42124?: 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.
Does CVE-2023-42124 have an EU (EUVD) identifier?: Yes. CVE-2023-42124 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-46583.
When was CVE-2023-42124 published?: CVE-2023-42124 was published on 2024-05-03 and last updated on 2026-06-17.

References

https://www.zerodayinitiative.com/advisories/ZDI-23-1474/

Affected products (1)

cpe:2.3:a:avast:premium_security:22.12.6044:*:*:*:*:*:*:*

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