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Vulnerability record · CVE-2007-2846 · published 24 May 2007

CVE-2007-2846: Avas\!t avast\! antivirus memory buffer overflow vulnerability

AAvas\!T · Avast\! Antivirus

Heap-based buffer overflow in the SIS unpacker in avast! Anti-Virus Managed Client before 4.7.700 allows user-assisted remote attackers to execute arbitrary code via a crafted SIS archive, resulting from an "integer cast around."

9.3 CVSS 2.0 High EPSS 7.7% · top 5.6% CWE-119 · Memory buffer overflow
9.3CVSS 2.0 base score
7.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
18References
16 Jun 2026Last modified by NVD

Description

Heap-based buffer overflow in the SIS unpacker in avast! Anti-Virus Managed Client before 4.7.700 allows user-assisted remote attackers to execute arbitrary code via a crafted SIS archive, resulting from an "integer cast around."

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://marc.info/?l=full-disclosure&m=118007660813710&w=2
http://osvdb.org/36522
http://www.avast.com/eng/adnm-management-client-revision-history.html
http://www.kb.cert.org/vuls/id/125868 US Government Resource
http://www.nruns.com/advisories/%5Bn.runs-SA-2007.009%5D%20-%20Avast%21%20Antivirus%20SIS%20parsing%20Arbitrary%20Code%2
http://www.securityfocus.com/archive/1/469585/100/0/threaded
http://www.securityfocus.com/bid/24155
http://www.vupen.com/english/advisories/2007/1935 Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/34501
http://marc.info/?l=full-disclosure&m=118007660813710&w=2
http://osvdb.org/36522
http://www.avast.com/eng/adnm-management-client-revision-history.html
http://www.kb.cert.org/vuls/id/125868 US Government Resource
http://www.nruns.com/advisories/%5Bn.runs-SA-2007.009%5D%20-%20Avast%21%20Antivirus%20SIS%20parsing%20Arbitrary%20Code%2
http://www.securityfocus.com/archive/1/469585/100/0/threaded
http://www.securityfocus.com/bid/24155
http://www.vupen.com/english/advisories/2007/1935 Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/34501

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2007-2846), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.