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CVE-2006-4626

21
FAUCET Score

CVE-2006-4626 describes a heap-based buffer overflow vulnerability in the alwil avast! Anti-virus Engine versions prior to 4.7.869. This flaw allows remote attackers to execute arbitrary code by crafting a malicious LHA archive file containing extended headers with excessively long concatenated file and directory names. With a CVSS score of 7.5, this vulnerability is considered highly severe, requiring no authentication and low attack complexity, potentially leading to partial confidentiality, integrity, and availability compromise. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.6.460CPE matchmatch criteria
cpe:2.3:a:alwil:avast_antivirus:*:*:server:*:*:*:*:*
<= 4.6.763CPE matchmatch criteria
cpe:2.3:a:alwil:avast_antivirus:*:*:*:*:*:*:*:*
4.0.168CPE matchmatch criteria
cpe:2.3:a:alwil:avast_antivirus:4.0.168:*:*:*:*:*:*:*
4.0.172CPE matchmatch criteria
cpe:2.3:a:alwil:avast_antivirus:4.0.172:*:*:*:*:*:*:*
4.0.183CPE matchmatch criteria
cpe:2.3:a:alwil:avast_antivirus:4.0.183:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.5HIGH

AV:N/AC:L/Au:N/C:P/I:P/A:P

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.4
CvssVersion
2.0

Exploit Intelligence

EPSS Score
4.58%
Probability of exploitation in next 30 days
EPSS Percentile
90.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0458 is in the 84th percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

secunia.com / advisories/21794
hustlelabs.com / advisories/04072006_alwil.pdf
ExploitPatchVendor Advisory
securityfocus.com / bid/19903
vupen.com / english/advisories/2006/3515