PatchTheCVECVE-2012-1426: The TAR file parser in Quick Heal (aka Cat QuickHeal) 11.00, Command Antivirus 5.2.11.5, F-Prot Antivirus 4.6.
40
This week
MEDIUM 4.3DOWNGRADEDOWNGRADEDOWNGRADE
CVE-2012-1426 is a medium-severity flaw (CVSS 4.3) affecting command antivirus, quick heal, f-prot antivirus. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
The TAR file parser in Quick Heal (aka Cat QuickHeal) 11.00, Command Antivirus 5.2.11.5, F-Prot Antivirus 4.6.2.117, K7 AntiVirus 9.77.3565, Norman Antivirus 6.06.12, and Rising Antivirus 22.83.00.03 allows remote attackers to bypass malware detection via a POSIX TAR file with an initial \42\5A\68 character sequence. NOTE: this may later be SPLIT into multiple CVEs if additional information is published showing that the error occurred independen
Why this priority
- EPSS top 1%: very likely to be exploited
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 4.3 (Medium) |
| EPSS exploit chance | 90.0% (top 1%) |
| CISA exploited list | No |
| Weakness | CWE-264 |
| Published | 2012-03-21 |
| Last modified | 2026-06-16 |
Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
authentium command antivirus DOWNGRADE
Affected: 5.2.11.5
Fixed in: no fixed release known
Safe to downgrade to: a release before 5.2.11.5
1. Check installed version
apt-cache policy command-antivirus || rpm -q command-antivirus || command-antivirus --version
2. No fixed release: DOWNGRADE to a release before 5.2.11.5 (Debian / Ubuntu)
apt-cache madison command-antivirus
sudo apt install command-antivirus=<VERSION_BEFORE_5.2.11.5>
sudo apt-mark hold command-antivirus
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list command-antivirus
sudo dnf downgrade command-antivirus-<VERSION_BEFORE_5.2.11.5>
sudo dnf versionlock add command-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.
cat quick heal DOWNGRADE
Affected: 11.00
Fixed in: no fixed release known
Safe to downgrade to: a release before 11.00
1. Check installed version
apt-cache policy quick-heal || rpm -q quick-heal || quick-heal --version
2. No fixed release: DOWNGRADE to a release before 11.00 (Debian / Ubuntu)
apt-cache madison quick-heal
sudo apt install quick-heal=<VERSION_BEFORE_11.00>
sudo apt-mark hold quick-heal
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list quick-heal
sudo dnf downgrade quick-heal-<VERSION_BEFORE_11.00>
sudo dnf versionlock add quick-heal
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.
f-prot f-prot antivirus DOWNGRADE
Affected: 4.6.2.117
Fixed in: no fixed release known
Safe to downgrade to: a release before 4.6.2.117
1. Check installed version
apt-cache policy f-prot-antivirus || rpm -q f-prot-antivirus || f-prot-antivirus --version
2. No fixed release: DOWNGRADE to a release before 4.6.2.117 (Debian / Ubuntu)
apt-cache madison f-prot-antivirus
sudo apt install f-prot-antivirus=<VERSION_BEFORE_4.6.2.117>
sudo apt-mark hold f-prot-antivirus
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list f-prot-antivirus
sudo dnf downgrade f-prot-antivirus-<VERSION_BEFORE_4.6.2.117>
sudo dnf versionlock add f-prot-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.
k7computing antivirus DOWNGRADE
Affected: 9.77.3565
Fixed in: no fixed release known
Safe to downgrade to: a release before 9.77.3565
1. Check installed version
apt-cache policy antivirus || rpm -q antivirus || antivirus --version
2. No fixed release: DOWNGRADE to a release before 9.77.3565 (Debian / Ubuntu)
apt-cache madison antivirus
sudo apt install antivirus=<VERSION_BEFORE_9.77.3565>
sudo apt-mark hold antivirus
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list antivirus
sudo dnf downgrade antivirus-<VERSION_BEFORE_9.77.3565>
sudo dnf versionlock add 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.
norman norman antivirus \& antispyware DOWNGRADE
Affected: 6.06.12
Fixed in: no fixed release known
Safe to downgrade to: a release before 6.06.12
1. Check installed version
apt-cache policy norman-antivirus--antispyware || rpm -q norman-antivirus--antispyware || norman-antivirus--antispyware --version
2. No fixed release: DOWNGRADE to a release before 6.06.12 (Debian / Ubuntu)
apt-cache madison norman-antivirus--antispyware
sudo apt install norman-antivirus--antispyware=<VERSION_BEFORE_6.06.12>
sudo apt-mark hold norman-antivirus--antispyware
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list norman-antivirus--antispyware
sudo dnf downgrade norman-antivirus--antispyware-<VERSION_BEFORE_6.06.12>
sudo dnf versionlock add norman-antivirus--antispyware
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.
rising-global rising antivirus DOWNGRADE
Affected: 22.83.00.03
Fixed in: no fixed release known
Safe to downgrade to: a release before 22.83.00.03
1. Check installed version
apt-cache policy rising-antivirus || rpm -q rising-antivirus || rising-antivirus --version
2. No fixed release: DOWNGRADE to a release before 22.83.00.03 (Debian / Ubuntu)
apt-cache madison rising-antivirus
sudo apt install rising-antivirus=<VERSION_BEFORE_22.83.00.03>
sudo apt-mark hold rising-antivirus
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list rising-antivirus
sudo dnf downgrade rising-antivirus-<VERSION_BEFORE_22.83.00.03>
sudo dnf versionlock add rising-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.
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.
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-2012-1426?
command antivirus: downgrade or apply the listed mitigation; quick heal: downgrade or apply the listed mitigation; f-prot antivirus: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2012-1426 being exploited?
CVE-2012-1426 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-2012-1426 affect?
CVE-2012-1426 affects command antivirus, quick heal, f-prot antivirus. Severity is medium (CVSS 4.3). The TAR file parser in Quick Heal (aka Cat QuickHeal) 11.00, Command Antivirus 5.2.11.5, F-Prot Antivirus 4.6.2.117, K7 AntiVirus 9.77.3565, Norman Antivirus 6.06.12, and Rising Antivirus 22.83.00.03 allows remote attackers to bypass malwar
How urgent is CVE-2012-1426?
Priority 40/100. EPSS top 1%: very likely to be exploited
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