Avast Free Antivirus AvastSvc Link Following Local Privilege Escalation Vulnerability
Published Nov 22, 2024
7.8
HIGHCVSS 3.1
EPSS 0.39%
Description
Avast Free Antivirus AvastSvc Link Following Local Privilege Escalation Vulnerability. This vulnerability allows local attackers to escalate privileges on affected installations of Avast Free Antivirus. 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 Avast Service. By creating a symbolic link, an attacker can abuse the service to delete a folder. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM. Was ZDI-CAN-22963.
Affected products
-
- Version 23.12.6094 (build 23.12.8700.813)StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Avast | Free Antivirus | n/a |
|
- 23.12.6094
-
- Version 23.12.6094StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Avast | Free Antivirus | n/a |
|
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
TotalDecision
n/aAssessed Nov 25, 2024 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2024–2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (5 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.39% (0.00385) | 30.13th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.39% (0.00387) | 30.25th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.03% (0.00028) | 4.90th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.07% (0.00065) | 30.89th | v3 (v2023.03.01) |
| Nov 23, 2024 | 0.07% (0.00065) | 30.57th | v3 (v2023.03.01) |
References (1)
- https://www.zerodayinitiative.com/advisories/ZDI-24-1004/ x_research-advisoryThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://www.zerodayinitiative.com/advisories/ZDI-24-1004/ | x_research-advisoryThird Party Advisory |
Change history (0)
No recorded changes yet.