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01 Record

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

MediumPUBLISHEDCNA: NLOK
CNA base score6.5 CVSS v3.xCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L

02 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

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.21% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 11.1% of scored records. A rank, not a probability.
NVD base score
4.7 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2023-04-19 18:35Z3 YR AGO
Last updated
2025-02-05 16:16Z1 YR AGO
Reserved
2023-03-22
Assigning CNA
NLOK
Record state
PUBLISHED
Severity
Medium (CVSS 6.5)
CNA CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
Weaknesses
  • CWE-367Time-of-check Time-of-use (TOCTOU) Race ConditionBase
Data version
5.1
Document digest
ab2c4831b16e81890732aade7637d34db7358f866595c96a8d6f97e79c207b6e

05 Affected products

VendorProductVersionsPlatforms
AvastAvast Antivirus22.5 to 22.10Windows
AVGAVG Antivirus22.5 to 22.10Windows

06 References