Unspecified vulnerability in the CHM unpacker in avast! before 4.7.844 has unknown impact and remote attack vectors.
Priority MEDIUM 46Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Unspecified vulnerability in the CHM unpacker in avast! before 4.7.844 has unknown impact and remote attack vectors.
Why it matters now
EPSS 0.01707 77th percentileScored 2026-11-07
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 · 14
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:alwil:avast_antivirus:4.0:*:home:*:*:*:*:* | 4.0 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.0:*:pro:*:*:*:*:* | 4.0 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.6:*:home:*:*:*:*:* | 4.6 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.6:*:pro:*:*:*:*:* | 4.6 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.6.603:*:pro:*:*:*:*:* | 4.6.603 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.6.652:*:home:*:*:*:*:* | 4.6.652 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.6.652:*:pro:*:*:*:*:* | 4.6.652 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.6.655:*:home:*:*:*:*:* | 4.6.655 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.6.665:*:home:*:*:*:*:* | 4.6.665 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.6.665:*:pro:*:*:*:*:* | 4.6.665 | Vulnerable | Alwil |
- cpe:2.3:a:alwil:avast_antivirus:4.0:*:home:*:*:*:*:* Versions 4.0 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.0:*:pro:*:*:*:*:* Versions 4.0 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.6:*:home:*:*:*:*:* Versions 4.6 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.6:*:pro:*:*:*:*:* Versions 4.6 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.6.603:*:pro:*:*:*:*:* Versions 4.6.603 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.6.652:*:home:*:*:*:*:* Versions 4.6.652 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.6.652:*:pro:*:*:*:*:* Versions 4.6.652 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.6.655:*:home:*:*:*:*:* Versions 4.6.655 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.6.665:*:home:*:*:*:*:* Versions 4.6.665 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.6.665:*:pro:*:*:*:*:* Versions 4.6.665 Vulnerable ·Alwil
Show 4 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:alwil:avast_antivirus:4.6.691:*:home:*:*:*:*:* | 4.6.691 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.6.691:*:pro:*:*:*:*:* | 4.6.691 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.7.827:*:home:*:*:*:*:* | 4.7.827 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.7.827:*:pro:*:*:*:*:* | 4.7.827 | Vulnerable | Alwil |
- cpe:2.3:a:alwil:avast_antivirus:4.6.691:*:home:*:*:*:*:* Versions 4.6.691 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.6.691:*:pro:*:*:*:*:* Versions 4.6.691 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.7.827:*:home:*:*:*:*:* Versions 4.7.827 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.7.827:*:pro:*:*:*:*:* Versions 4.7.827 Vulnerable ·Alwil
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2006-2869
- 2026-10-03 Alias added: GHSA-gx46-m3qm-69wf
References
More Alwil Avast Antivirus vulnerabilities
- TI-2012-01281 The TAR file parser in AhnLab V3 Internet Security 2011.01.18.00, Avira AntiVir… CVSS 2.0MEDIUM 4.3
- TI-2012-01279 The TAR file parser in Avira AntiVir 7.11.1.163, Antiy Labs AVL SDK 2.0.3.7, avast!… CVSS 2.0MEDIUM 4.3
- TI-2012-01265 The RAR file parser in ClamAV 0.96.4, Rising Antivirus 22.83.00.03, Quick Heal (aka Cat… CVSS 2.0MEDIUM 4.3
- TI-2006-04472 Heap-based buffer overflow in alwil avast! Anti-virus Engine before 4.7.869 allows remote… CVSS 2.0HIGH 7.5
- TI-2005-02257 Buffer overflow in a third-party compression library (UNACEV2.DLL), as used in avast!… CVSS 2.0HIGH 7.5
- TI-2005-01627 Unknown vulnerability in ALWIL avast! antivirus 4 (4.6.6230) and earlier, when running on… CVSS 2.0HIGH 7.5
Sources
- CVE-2006-2869 · CVE Program
- CVE-2006-2869 · NVD
- FIRST EPSS
- GHSA-gx46-m3qm-69wf · GitHub Advisory Database · CC BY 4.0
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