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CVE-2007-2846

26
FAUCET Score

CVE-2007-2846 describes a heap-based buffer overflow vulnerability in the SIS unpacker of avast! Anti-Virus Managed Client versions prior to 4.7.700. This flaw, stemming from an "integer cast around," allows user-assisted remote attackers to execute arbitrary code through a specially crafted SIS archive. With a CVSS score of 9.3, this vulnerability is critical, indicating a network-based attack with medium complexity that could lead to complete compromise of confidentiality, integrity, and availability. Despite its high severity and FAUCET Risk Score of 96/100, 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
4.6.394CPE matchmatch criteria
cpe:2.3:a:avas\!t:avast\!_antivirus:4.6.394:*:*:*:*:*:*:*
<= 4.7.652CPE matchmatch criteria
cpe:2.3:a:avast\!:avast\!_antivirus:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

9.3HIGH

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

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
7.74%
Probability of exploitation in next 30 days
EPSS Percentile
94.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0774 is in the 72nd percentile among its peer group of 8,918 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 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

marc.info
osvdb.org / 36522
exchange.xforce.ibmcloud.com / vulnerabilities/34501
avast.com / eng/adnm-management-client-revision-history.html
kb.cert.org / vuls/id/125868
US Government Resource
nruns.com / advisories/%5Bn.runs-SA-2007.009%5D%20-%20Avast%21%20Antivirus%20SIS%20parsing%20Arbitrary%20Code%20Execution%20Advisory.txt
securityfocus.com / archive/1/469585/100/0/threaded
securityfocus.com / bid/24155
vupen.com / english/advisories/2007/1935
Vendor Advisory