Read the docs
TI-2020-19172 Aliases CVE-2020-37037GHSA-9rj3-rfg4-9w59

AVAST SecureLine 5.5.522.0 - 'SecureLine' Unquoted Service Path

Priority HIGH 72CWE-428Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-428.

Summary

Avast SecureLine 5.5.522.0 contains an unquoted service path vulnerability that allows local users to potentially execute code with elevated system privileges. Attackers can exploit the unquoted path in the service configuration to inject malicious code that would execute with LocalSystem account permissions during service startup.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00166 5th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
AvastAVAST SecureLine5.5.522.0—No fix listedCNA
  • AVAST SecureLine VendorAvast Affected 5.5.522.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-37037
  2. 2026-10-03 Alias added: GHSA-9rj3-rfg4-9w59

References

Exploit 1

Other 1

  • TI-2025-43447 AVAST Antivirus 25.11 Unquoted Service Path Privilege Escalation CVSS 4.0HIGH 8.5
  • TI-2010-02987 Untrusted search path vulnerability in avast! Free Antivirus version 5.0.594 and earlier… CVSS 2.0HIGH 9.3
  • TI-2007-02752 Heap-based buffer overflow in the CAB unpacker in avast! Anti-Virus Managed Client before… CVSS 2.0HIGH 9.3
  • TI-2020-14724 An issue was discovered in retdec v3.3. CVSS 3.1CRITICAL 9.8
  • 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
See all 83 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences