AhnLab V3 2008.12.4.1 and possibly 2008.9.13.0, when Internet Explorer 6 or 7 is used…
Priority MEDIUM 44CWE-20Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- 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
AhnLab V3 2008.12.4.1 and possibly 2008.9.13.0, when Internet Explorer 6 or 7 is used, allows remote attackers to bypass detection of malware in an HTML document by placing an MZ header (aka "EXE info") at the beginning, and modifying the filename to have (1) no extension, (2) a .txt extension, or (3) a .jpg extension, as demonstrated by a document containing a CVE-2006-5745 exploit.
Why it matters now
EPSS 0.01905 79th 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 · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:ahnlab:v3_internet_security:2008.9.13.0:*:*:*:*:*:*:* | 2008.9.13.0 | Vulnerable | Ahnlab |
| cpe:2.3:a:ahnlab:v3_internet_security:2008.12.4.1:*:*:*:*:*:*:* | 2008.12.4.1 | Vulnerable | Ahnlab |
| cpe:2.3:a:microsoft:internet_explorer:6:*:*:*:*:*:*:* | 6 | Running on | Microsoft |
| cpe:2.3:a:microsoft:internet_explorer:7:*:*:*:*:*:*:* | 7 | Running on | Microsoft |
- cpe:2.3:a:ahnlab:v3_internet_security:2008.9.13.0:*:*:*:*:*:*:* Versions 2008.9.13.0 Vulnerable ·Ahnlab
- cpe:2.3:a:ahnlab:v3_internet_security:2008.12.4.1:*:*:*:*:*:*:* Versions 2008.12.4.1 Vulnerable ·Ahnlab
- cpe:2.3:a:microsoft:internet_explorer:6:*:*:*:*:*:*:* Versions 6 Running on ·Microsoft
- cpe:2.3:a:microsoft:internet_explorer:7:*:*:*:*:*:*:* Versions 7 Running on ·Microsoft
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2008-5520
- 2026-10-03 Alias added: GHSA-qx57-9wcq-8jq6
References
Advisory 1
More Ahnlab V3 Internet Security vulnerabilities
- TI-2012-01284 The ZIP file parser in AhnLab V3 Internet Security 2011.01.18.00, AVG Anti-Virus… CVSS 2.0MEDIUM 4.3
- TI-2012-01281 The TAR file parser in AhnLab V3 Internet Security 2011.01.18.00, Avira AntiVir… CVSS 2.0MEDIUM 4.3
- TI-2012-01265 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-2012-01285 The ELF file parser in AhnLab V3 Internet Security 2011.01.18.00, Bitdefender 7.2, Quick… CVSS 2.0MEDIUM 4.3
- TI-2012-01258 The Microsoft EXE file parser in AhnLab V3 Internet Security 2011.01.18.00, Emsisoft… CVSS 2.0MEDIUM 4.3
- TI-2012-01257 The Microsoft EXE file parser in AhnLab V3 Internet Security 2011.01.18.00, Emsisoft… CVSS 2.0MEDIUM 4.3
Sources
- CVE-2008-5520 · CVE Program
- CVE-2008-5520 · NVD
- FIRST EPSS
- GHSA-qx57-9wcq-8jq6 · 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