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CVE-2020-9264: ESET Archive Support Module before 1296 allows virus-detection bypass via a crafted Compression Information Fi

36
Routine
MEDIUM 5.5UPGRADEUPGRADEUPGRADE

CVE-2020-9264 is a medium-severity flaw (CVSS 5.5) affecting cyber security, internet security, mobile security. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

ESET Archive Support Module before 1296 allows virus-detection bypass via a crafted Compression Information Field in a ZIP archive. This affects versions before 1294 of Smart Security Premium, Internet Security, NOD32 Antivirus, Cyber Security Pro (macOS), Cyber Security (macOS), Mobile Security for Android, Smart TV Security, and NOD32 Antivirus 4 for Linux Desktop.

Why this priority

  • No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score5.5 (Medium)
Attack vectorLocal
Attack complexityLow
Privileges neededNone
User interactionRequired
EPSS exploit chance1.2% (top 32%)
CISA exploited listNo
WeaknessCWE-436
Published2020-02-18
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: eset

Share: LinkedIn · X · Reddit

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

Am I affected?

Timeline

eset cyber security UPGRADE
Affected: < 1296
Fixed in: 1296
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy cyber-security || rpm -q cyber-security || cyber-security --version
2. UPGRADE to 1296 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade cyber-security
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade cyber-security
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
eset internet security UPGRADE
Affected: < 1296
Fixed in: 1296
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy internet-security || rpm -q internet-security || internet-security --version
2. UPGRADE to 1296 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade internet-security
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade internet-security
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
eset mobile security UPGRADE
Affected: < 1296
Fixed in: 1296
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy mobile-security || rpm -q mobile-security || mobile-security --version
2. UPGRADE to 1296 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade mobile-security
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade mobile-security
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
eset nod32 antivirus UPGRADE
Affected: < 1296
Fixed in: 1296
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy nod32-antivirus || rpm -q nod32-antivirus || nod32-antivirus --version
2. UPGRADE to 1296 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade nod32-antivirus
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade nod32-antivirus
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
eset nod32 antivirus DOWNGRADE
Affected: 4
Fixed in: no fixed release known
Safe to downgrade to: a release before 4
1. Check installed version
apt-cache policy nod32-antivirus || rpm -q nod32-antivirus || nod32-antivirus --version
2. No fixed release: DOWNGRADE to a release before 4 (Debian / Ubuntu)
apt-cache madison nod32-antivirus sudo apt install nod32-antivirus=<VERSION_BEFORE_4> sudo apt-mark hold nod32-antivirus
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list nod32-antivirus sudo dnf downgrade nod32-antivirus-<VERSION_BEFORE_4> sudo dnf versionlock add nod32-antivirus
Downgrade risk
Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.
After downgrade
Restart the service, and keep the package held until a fixed release ships.
eset smart security UPGRADE
Affected: < 1296
Fixed in: 1296
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy smart-security || rpm -q smart-security || smart-security --version
2. UPGRADE to 1296 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade smart-security
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade smart-security
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-2020-9264?

cyber security: upgrade to 1296; internet security: upgrade to 1296; mobile security: upgrade to 1296. Exact commands for each OS are on this page.

Is CVE-2020-9264 being exploited?

CVE-2020-9264 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-2020-9264 affect?

CVE-2020-9264 affects cyber security, internet security, mobile security. Severity is medium (CVSS 5.5). ESET Archive Support Module before 1296 allows virus-detection bypass via a crafted Compression Information Field in a ZIP archive. This affects versions before 1294 of Smart Security Premium, Internet Security, NOD32 Antivirus, Cyber Secur

How urgent is CVE-2020-9264?

Priority 36/100. No elevated risk signals yet.

Software pages

Android vulnerabilities · macOS vulnerabilities · ESET vulnerabilities

Related CVEs

References

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