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CVE-2007-1673

21
FAUCET Score

CVE-2007-1673 describes a denial-of-service vulnerability in unzoo.c, affecting multiple products including AMaViS 2.4.1 and earlier, Avast, Avira, and Panda. The vulnerability allows remote attackers to trigger an infinite loop by providing a specially crafted ZOO archive where a direntry structure points to a previous file. With a CVSS score of 7.8 (High), this vulnerability has a network attack vector, low attack complexity, and a high impact on availability. Despite its severity, there is no evidence of active exploitation, no known public exploit code (Metasploit, Nuclei, ExploitDB), and minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.4.1CPE matchmatch criteria
cpe:2.3:a:amavis:amavis:*:*:*:*:*:*:*:*
<= 4.7.980CPE matchmatch criteria
cpe:2.3:a:avast:avast_antivirus:*:*:*:*:*:*:*:*
4.6.394CPE matchmatch criteria
cpe:2.3:a:avast:avast_antivirus:4.6.394:*:*:*:*:*:*:*
4.7.652CPE matchmatch criteria
cpe:2.3:a:avast:avast_antivirus:4.7.652:*:*:*:*:*:*:*
4.7.700CPE matchmatch criteria
cpe:2.3:a:avast:avast_antivirus:4.7.700:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.18%
Probability of exploitation in next 30 days
EPSS Percentile
86.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0318 is in the 76th percentile among its peer group of 51,466 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

osvdb.org / 36208
secunia.com / advisories/25315
Vendor Advisory
securityreason.com / securityalert/2680
exchange.xforce.ibmcloud.com / vulnerabilities/34080
amavis.org / security/asa-2007-2.txt
securityfocus.com / archive/1/467646/100/0/threaded
securityfocus.com / bid/23823
Exploit