Heap-based buffer overflow in alwil avast! Anti-virus Engine before 4.7.869 allows remote…
Priority MEDIUM 41Published · 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
- Partial · Partial · Partial
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Heap-based buffer overflow in alwil avast! Anti-virus Engine before 4.7.869 allows remote attackers to execute arbitrary code via a crafted LHA file that contains extended headers with file and directory names whose concatenation triggers the overflow.
Why it matters now
EPSS 0.04786 91st 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 · 29
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:alwil:avast_antivirus:*:*:server:*:*:*:*:* | up to 4.6.460 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:*:*:*:*:*:*:*:* | up to 4.6.763 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.0.168:*:*:*:*:*:*:* | 4.0.168 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.0.172:*:*:*:*:*:*:* | 4.0.172 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.0.183:*:*:*:*:*:*:* | 4.0.183 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.0.202:*:*:*:*:*:*:* | 4.0.202 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.0.211:*:*:*:*:*:*:* | 4.0.211 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.0.229:*:*:*:*:*:*:* | 4.0.229 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.0.235:*:*:*:*:*:*:* | 4.0.235 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.1.260:*:*:*:*:*:*:* | 4.1.260 | Vulnerable | Alwil |
- cpe:2.3:a:alwil:avast_antivirus:*:*:server:*:*:*:*:* Versions up to 4.6.460 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:*:*:*:*:*:*:*:* Versions up to 4.6.763 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.0.168:*:*:*:*:*:*:* Versions 4.0.168 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.0.172:*:*:*:*:*:*:* Versions 4.0.172 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.0.183:*:*:*:*:*:*:* Versions 4.0.183 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.0.202:*:*:*:*:*:*:* Versions 4.0.202 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.0.211:*:*:*:*:*:*:* Versions 4.0.211 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.0.229:*:*:*:*:*:*:* Versions 4.0.229 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.0.235:*:*:*:*:*:*:* Versions 4.0.235 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.1.260:*:*:*:*:*:*:* Versions 4.1.260 Vulnerable ·Alwil
Show 19 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:alwil:avast_antivirus:4.1.268:*:*:*:*:*:*:* | 4.1.268 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.1.278:*:*:*:*:*:*:* | 4.1.278 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.1.287:*:*:*:*:*:*:* | 4.1.287 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.1.289:*:*:*:*:*:*:* | 4.1.289 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.1.304:*:*:*:*:*:*:* | 4.1.304 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.1.319:*:*:*:*:*:*:* | 4.1.319 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.1.335:*:*:*:*:*:*:* | 4.1.335 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.1.342:*:*:*:*:*:*:* | 4.1.342 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.1.357:*:*:*:*:*:*:* | 4.1.357 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.1.389:*:*:*:*:*:*:* | 4.1.389 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.1.396:*:*:*:*:*:*:* | 4.1.396 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.1.412:*:*:*:*:*:*:* | 4.1.412 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.1.418:*:*:*:*:*:*:* | 4.1.418 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.1.501:*:*:*:*:*:*:* | 4.1.501 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.5.518:*:*:*:*:*:*:* | 4.5.518 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.5.549:*:*:*:*:*:*:* | 4.5.549 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.5.561:*:*:*:*:*:*:* | 4.5.561 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.6.603:*:*:*:*:*:*:* | 4.6.603 | Vulnerable | Alwil |
| cpe:2.3:a:alwil:avast_antivirus:4.6.623:*:*:*:*:*:*:* | 4.6.623 | Vulnerable | Alwil |
- cpe:2.3:a:alwil:avast_antivirus:4.1.268:*:*:*:*:*:*:* Versions 4.1.268 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.1.278:*:*:*:*:*:*:* Versions 4.1.278 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.1.287:*:*:*:*:*:*:* Versions 4.1.287 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.1.289:*:*:*:*:*:*:* Versions 4.1.289 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.1.304:*:*:*:*:*:*:* Versions 4.1.304 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.1.319:*:*:*:*:*:*:* Versions 4.1.319 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.1.335:*:*:*:*:*:*:* Versions 4.1.335 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.1.342:*:*:*:*:*:*:* Versions 4.1.342 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.1.357:*:*:*:*:*:*:* Versions 4.1.357 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.1.389:*:*:*:*:*:*:* Versions 4.1.389 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.1.396:*:*:*:*:*:*:* Versions 4.1.396 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.1.412:*:*:*:*:*:*:* Versions 4.1.412 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.1.418:*:*:*:*:*:*:* Versions 4.1.418 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.1.501:*:*:*:*:*:*:* Versions 4.1.501 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.5.518:*:*:*:*:*:*:* Versions 4.5.518 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.5.549:*:*:*:*:*:*:* Versions 4.5.549 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.5.561:*:*:*:*:*:*:* Versions 4.5.561 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.6.603:*:*:*:*:*:*:* Versions 4.6.603 Vulnerable ·Alwil
- cpe:2.3:a:alwil:avast_antivirus:4.6.623:*:*:*:*:*:*:* Versions 4.6.623 Vulnerable ·Alwil
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2006-4626
- 2026-10-03 Alias added: GHSA-qf9j-7j34-r94m
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-2006-02777 Unspecified vulnerability in the CHM unpacker in avast! before 4.7.844 has unknown impact and remote attack vectors. CVSS 2.0HIGH 10.0
- 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-2006-4626 · CVE Program
- CVE-2006-4626 · NVD
- FIRST EPSS
- GHSA-qf9j-7j34-r94m · 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