A Cross Site Scripting (XSS) issue exists in Avast AntiVirus (Free, Internet Security…
Priority LOW 29CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-79.
Summary
A Cross Site Scripting (XSS) issue exists in Avast AntiVirus (Free, Internet Security, and Premiere Edition) 19.3.2369 build 19.3.4241.440 in the Network Notification Popup, allowing an attacker to execute JavaScript code via an SSID Name.
Why it matters now
EPSS 0.00852 58th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:avast:antivirus:19.3.2369:*:*:*:free:*:*:* | 19.3.2369 | Vulnerable | Avast |
| cpe:2.3:a:avast:antivirus:19.3.2369:*:*:*:internet_security:*:*:* | 19.3.2369 | Vulnerable | Avast |
| cpe:2.3:a:avast:antivirus:19.3.2369:*:*:*:premiere:*:*:* | 19.3.2369 | Vulnerable | Avast |
| cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Microsoft |
- cpe:2.3:a:avast:antivirus:19.3.2369:*:*:*:free:*:*:* Versions 19.3.2369 Vulnerable ·Avast
- cpe:2.3:a:avast:antivirus:19.3.2369:*:*:*:internet_security:*:*:* Versions 19.3.2369 Vulnerable ·Avast
- cpe:2.3:a:avast:antivirus:19.3.2369:*:*:*:premiere:*:*:* Versions 19.3.2369 Vulnerable ·Avast
- cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2019-18653
- 2026-10-03 Alias added: GHSA-c7cg-5x5v-hrhj
References
More Avast Antivirus vulnerabilities
- TI-2020-08753 An issue was discovered in Avast Antivirus before 20. CVSS 3.1CRITICAL 9.8
- TI-2017-05872 In Avast Antivirus before v17, using the LPC interface API exposed by the AvastSVC.exe… CVSS 3.0CRITICAL 9.8
- TI-2025-03074 Integer Overflow in Avast Antiviurs 25.1.981.6 on Windows may result in privilege escalation CVSS 3.1CRITICAL 9.8
- TI-2025-11929 Time-of-check time-of-use race condition in Avast Antivirus CVSS 3.1CRITICAL 9.9
- TI-2021-20488 Privilege escalation vulnerability in the Self-Defense driver of Avast Antivirus prior to… CVSS 3.1HIGH 8.8
- TI-2021-20487 Privilege escalation vulnerability in the Sandbox component of Avast Antivirus prior to… CVSS 3.1HIGH 8.8
Sources
- CVE-2019-18653 · CVE Program
- CVE-2019-18653 · NVD
- FIRST EPSS
- GHSA-c7cg-5x5v-hrhj · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences