PatchTheCVECVE-2006-6201: Heap-based buffer overflow in Borland idsql32.dll 5.1.0.4, as used by RevilloC MailServer; 5.2.0.2 as used by
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This month
HIGH 7.5DOWNGRADEDOWNGRADEDOWNGRADE
CVE-2006-6201 is a high-severity flaw (CVSS 7.5) affecting c\+\+ builder, c builder, delphi. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Heap-based buffer overflow in Borland idsql32.dll 5.1.0.4, as used by RevilloC MailServer; 5.2.0.2 as used by Borland Developer Studio 2006; and possibly other versions allows remote attackers to execute arbitrary code via a long SQL statement, related to use of the DbiQExec function.
Why this priority
- High severity
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 7.5 (High) |
| EPSS exploit chance | 3.4% (top 11%) |
| CISA exploited list | No |
| Published | 2006-12-01 |
| 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
borland software c\+\+ builder DOWNGRADE
Affected: 5.x · 6.x · 2006
Fixed in: no fixed release known
Safe to downgrade to: a release before 5.x
1. Check installed version
apt-cache policy c++-builder || rpm -q c++-builder || c++-builder --version
2. No fixed release: DOWNGRADE to a release before 5.x (Debian / Ubuntu)
apt-cache madison c++-builder
sudo apt install c++-builder=<VERSION_BEFORE_5.x>
sudo apt-mark hold c++-builder
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list c++-builder
sudo dnf downgrade c++-builder-<VERSION_BEFORE_5.x>
sudo dnf versionlock add c++-builder
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.
borland software c builder DOWNGRADE
Affected: 2006
Fixed in: no fixed release known
Safe to downgrade to: a release before 2006
1. Check installed version
apt-cache policy c-builder || rpm -q c-builder || c-builder --version
2. No fixed release: DOWNGRADE to a release before 2006 (Debian / Ubuntu)
apt-cache madison c-builder
sudo apt install c-builder=<VERSION_BEFORE_2006>
sudo apt-mark hold c-builder
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list c-builder
sudo dnf downgrade c-builder-<VERSION_BEFORE_2006>
sudo dnf versionlock add c-builder
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.
borland software delphi DOWNGRADE
Affected: 5.x · 6.x · 7.x · 2006
Fixed in: no fixed release known
Safe to downgrade to: a release before 5.x
1. Check installed version
apt-cache policy delphi || rpm -q delphi || delphi --version
2. No fixed release: DOWNGRADE to a release before 5.x (Debian / Ubuntu)
apt-cache madison delphi
sudo apt install delphi=<VERSION_BEFORE_5.x>
sudo apt-mark hold delphi
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list delphi
sudo dnf downgrade delphi-<VERSION_BEFORE_5.x>
sudo dnf versionlock add delphi
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.
borland software developer studio DOWNGRADE
Affected: 2006
Fixed in: no fixed release known
Safe to downgrade to: a release before 2006
1. Check installed version
apt-cache policy developer-studio || rpm -q developer-studio || developer-studio --version
2. No fixed release: DOWNGRADE to a release before 2006 (Debian / Ubuntu)
apt-cache madison developer-studio
sudo apt install developer-studio=<VERSION_BEFORE_2006>
sudo apt-mark hold developer-studio
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list developer-studio
sudo dnf downgrade developer-studio-<VERSION_BEFORE_2006>
sudo dnf versionlock add developer-studio
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.
borland software idsql32.dll DOWNGRADE
Affected: 5.1.0.2 · 5.1.0.4
Fixed in: no fixed release known
Safe to downgrade to: a release before 5.1.0.2
1. Check installed version
apt-cache policy idsql32.dll || rpm -q idsql32.dll || idsql32.dll --version
2. No fixed release: DOWNGRADE to a release before 5.1.0.2 (Debian / Ubuntu)
apt-cache madison idsql32.dll
sudo apt install idsql32.dll=<VERSION_BEFORE_5.1.0.2>
sudo apt-mark hold idsql32.dll
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list idsql32.dll
sudo dnf downgrade idsql32.dll-<VERSION_BEFORE_5.1.0.2>
sudo dnf versionlock add idsql32.dll
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.
revilloc mailserver MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy mailserver || rpm -q mailserver || mailserver --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
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-2006-6201?
c\+\+ builder: downgrade or apply the listed mitigation; c builder: downgrade or apply the listed mitigation; delphi: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2006-6201 being exploited?
CVE-2006-6201 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-2006-6201 affect?
CVE-2006-6201 affects c\+\+ builder, c builder, delphi. Severity is high (CVSS 7.5). Heap-based buffer overflow in Borland idsql32.dll 5.1.0.4, as used by RevilloC MailServer; 5.2.0.2 as used by Borland Developer Studio 2006; and possibly other versions allows remote attackers to execute arbitrary code via a long SQL statem
How urgent is CVE-2006-6201?
Priority 48/100. High severity
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