How severe is CVE-2023-1586?

CVE-2023-1586 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.

Is CVE-2023-1586 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-1586?

CVE-2023-1586 primarily affects Avast Antivirus. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-1586?

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

When was CVE-2023-1586 published?

CVE-2023-1586 was published on 2023-04-19 and last updated on 2026-06-17.

CVE-2023-1586

CVE-2023-1586 is a medium-severity vulnerability in Avast Antivirus with a CVSS 3.x base score of 6.5. 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-367.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-367
Affected product: Avast Antivirus
Published: 2023-04-19
Last modified: 2026-06-17

Description

Avast and AVG Antivirus for Windows were susceptible to a Time-of-check/Time-of-use (TOCTOU) vulnerability in the restore process leading to arbitrary file creation. The issue was fixed with Avast and AVG Antivirus version 22.11

Frequently asked questions

What is CVE-2023-1586?: Avast and AVG Antivirus for Windows were susceptible to a Time-of-check/Time-of-use (TOCTOU) vulnerability in the restore process leading to arbitrary file creation. The issue was fixed with Avast and AVG Antivirus version 22.11
How severe is CVE-2023-1586?: CVE-2023-1586 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability low.
Is CVE-2023-1586 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-1586?: CVE-2023-1586 primarily affects Avast Antivirus. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-1586?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-1586 published?: CVE-2023-1586 was published on 2023-04-19 and last updated on 2026-06-17.

References

https://support.norton.com/sp/static/external/tools/security-advisories.html

Affected products (2)

cpe:2.3:a:avast:antivirus:*:*:*:*:*:*:*:*
cpe:2.3:a:avg:anti-virus:*:*:*:*:*:*:*:*

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