CVE-2015-5662: Directory traversal vulnerability in Avast before 150918-0 allows remote attackers to delete or write to arbit

Q: How do I fix CVE-2015-5662?

avast antivirus: upgrade to newer than 151017-1. Exact commands for each OS are on this page.

Q: Is CVE-2015-5662 being exploited?

CVE-2015-5662 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2015-5662 affect?

CVE-2015-5662 affects avast antivirus. Severity is medium (CVSS 6.4). Directory traversal vulnerability in Avast before 150918-0 allows remote attackers to delete or write to arbitrary files via a crafted entry in a ZIP archive.

Q: How urgent is CVE-2015-5662?

Priority 44/100. No elevated risk signals yet.

This month

MEDIUM 6.4UPGRADE

CVE-2015-5662 is a medium-severity flaw (CVSS 6.4) affecting avast antivirus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Directory traversal vulnerability in Avast before 150918-0 allows remote attackers to delete or write to arbitrary files via a crafted entry in a ZIP archive.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.4 (Medium)
EPSS exploit chance	3.0% (top 13%)
CISA exploited list	No
Weakness	CWE-22
Published	2015-10-18
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: avast

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2015-10-18 10:59 UTCPublished CVE record published
2026-06-17 00:29 UTCUpdated Record last modified

avast avast antivirus UPGRADE

Affected: <= 151017-1

Fixed in: newer than 151017-1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy avast-antivirus || rpm -q avast-antivirus || avast-antivirus --version

2. UPGRADE to newer than 151017-1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade avast-antivirus

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade avast-antivirus

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2015-5662?

avast antivirus: upgrade to newer than 151017-1. Exact commands for each OS are on this page.

Is CVE-2015-5662 being exploited?

CVE-2015-5662 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2015-5662 affect?

CVE-2015-5662 affects avast antivirus. Severity is medium (CVSS 6.4). Directory traversal vulnerability in Avast before 150918-0 allows remote attackers to delete or write to arbitrary files via a crafted entry in a ZIP archive.

How urgent is CVE-2015-5662?

Priority 44/100. No elevated risk signals yet.

Related CVEs

CVE-2012-1459 MEDIUM 4.3 DOWNGRADE DOWNGRADE The TAR file parser in AhnLab V3 Internet Security 2011.01.18.00, Avira AntiVir 7.11.1.163, Antiy Labs AVL SDK
CVE-2012-1457 MEDIUM 4.3 DOWNGRADE DOWNGRADE The TAR file parser in Avira AntiVir 7.11.1.163, Antiy Labs AVL SDK 2.0.3.7, avast! Antivirus 4.8.1351.0 and 5
CVE-2012-1443 MEDIUM 4.3 DOWNGRADE DOWNGRADE The RAR file parser in ClamAV 0.96.4, Rising Antivirus 22.83.00.03, Quick Heal (aka Cat QuickHeal) 11.00, G Da
CVE-2008-6846 MEDIUM 6.8 DOWNGRADE Multiple stack-based buffer overflows in avast! Linux Home Edition 1.0.5, 1.0.5-1, and 1.0.8 allow remote atta
CVE-2008-5523 HIGH 9.3 DOWNGRADE avast! antivirus 4.8.1281.0, when Internet Explorer 6 or 7 is used, allows remote attackers to bypass detectio

References

← Back to latest CVEs