PatchTheCVECVE-2007-5331: Queue.dll for the message queuing service (LQserver.exe) in CA BrightStor ARCServe BackUp v9.01 through R11.5,
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HIGH 10.0DOWNGRADEDOWNGRADEDOWNGRADE
CVE-2007-5331 is a high-severity flaw (CVSS 10.0) affecting brightstor arcserve backup, brightstor enterprise backup, business protection suite. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Queue.dll for the message queuing service (LQserver.exe) in CA BrightStor ARCServe BackUp v9.01 through R11.5, and Enterprise Backup r10.5, allows remote attackers to execute arbitrary code via a malformed ONRPC protocol request for operation 0x76, which causes ARCserve Backup to dereference arbitrary pointers.
Why this priority
- Critical severity
- EPSS top 4%: very likely to be exploited
No fix is published yet: follow the downgrade or mitigation steps.
Risk facts
| CVSS score | 10.0 (High) |
| EPSS exploit chance | 9.9% (top 4%) |
| CISA exploited list | No |
| Weakness | CWE-94 |
| Published | 2007-10-13 |
| 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
broadcom brightstor arcserve backup DOWNGRADE
Affected: 9.01 · 11.1 · 11.5
Fixed in: no fixed release known
Safe to downgrade to: a release before 9.01
1. Check installed version
apt-cache policy brightstor-arcserve-backup || rpm -q brightstor-arcserve-backup || brightstor-arcserve-backup --version
2. No fixed release: DOWNGRADE to a release before 9.01 (Debian / Ubuntu)
apt-cache madison brightstor-arcserve-backup
sudo apt install brightstor-arcserve-backup=<VERSION_BEFORE_9.01>
sudo apt-mark hold brightstor-arcserve-backup
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list brightstor-arcserve-backup
sudo dnf downgrade brightstor-arcserve-backup-<VERSION_BEFORE_9.01>
sudo dnf versionlock add brightstor-arcserve-backup
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.
broadcom brightstor enterprise backup DOWNGRADE
Affected: 10.5
Fixed in: no fixed release known
Safe to downgrade to: a release before 10.5
1. Check installed version
apt-cache policy brightstor-enterprise-backup || rpm -q brightstor-enterprise-backup || brightstor-enterprise-backup --version
2. No fixed release: DOWNGRADE to a release before 10.5 (Debian / Ubuntu)
apt-cache madison brightstor-enterprise-backup
sudo apt install brightstor-enterprise-backup=<VERSION_BEFORE_10.5>
sudo apt-mark hold brightstor-enterprise-backup
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list brightstor-enterprise-backup
sudo dnf downgrade brightstor-enterprise-backup-<VERSION_BEFORE_10.5>
sudo dnf versionlock add brightstor-enterprise-backup
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.
broadcom business protection suite DOWNGRADE
Affected: 2.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 2.0
1. Check installed version
apt-cache policy business-protection-suite || rpm -q business-protection-suite || business-protection-suite --version
2. No fixed release: DOWNGRADE to a release before 2.0 (Debian / Ubuntu)
apt-cache madison business-protection-suite
sudo apt install business-protection-suite=<VERSION_BEFORE_2.0>
sudo apt-mark hold business-protection-suite
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list business-protection-suite
sudo dnf downgrade business-protection-suite-<VERSION_BEFORE_2.0>
sudo dnf versionlock add business-protection-suite
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.
broadcom server protection suite DOWNGRADE
Affected: 2
Fixed in: no fixed release known
Safe to downgrade to: a release before 2
1. Check installed version
apt-cache policy server-protection-suite || rpm -q server-protection-suite || server-protection-suite --version
2. No fixed release: DOWNGRADE to a release before 2 (Debian / Ubuntu)
apt-cache madison server-protection-suite
sudo apt install server-protection-suite=<VERSION_BEFORE_2>
sudo apt-mark hold server-protection-suite
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list server-protection-suite
sudo dnf downgrade server-protection-suite-<VERSION_BEFORE_2>
sudo dnf versionlock add server-protection-suite
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.
ca brightstor arcserve backup DOWNGRADE
Affected: 11
Fixed in: no fixed release known
Safe to downgrade to: a release before 11
1. Check installed version
apt-cache policy brightstor-arcserve-backup || rpm -q brightstor-arcserve-backup || brightstor-arcserve-backup --version
2. No fixed release: DOWNGRADE to a release before 11 (Debian / Ubuntu)
apt-cache madison brightstor-arcserve-backup
sudo apt install brightstor-arcserve-backup=<VERSION_BEFORE_11>
sudo apt-mark hold brightstor-arcserve-backup
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list brightstor-arcserve-backup
sudo dnf downgrade brightstor-arcserve-backup-<VERSION_BEFORE_11>
sudo dnf versionlock add brightstor-arcserve-backup
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.
ca business protection suite DOWNGRADE
Affected: 2.0
Fixed in: no fixed release known
Safe to downgrade to: a release before 2.0
1. Check installed version
apt-cache policy business-protection-suite || rpm -q business-protection-suite || business-protection-suite --version
2. No fixed release: DOWNGRADE to a release before 2.0 (Debian / Ubuntu)
apt-cache madison business-protection-suite
sudo apt install business-protection-suite=<VERSION_BEFORE_2.0>
sudo apt-mark hold business-protection-suite
2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list business-protection-suite
sudo dnf downgrade business-protection-suite-<VERSION_BEFORE_2.0>
sudo dnf versionlock add business-protection-suite
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-2007-5331?
brightstor arcserve backup: downgrade or apply the listed mitigation; brightstor enterprise backup: downgrade or apply the listed mitigation; business protection suite: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.
Is CVE-2007-5331 being exploited?
CVE-2007-5331 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-2007-5331 affect?
CVE-2007-5331 affects brightstor arcserve backup, brightstor enterprise backup, business protection suite. Severity is high (CVSS 10.0). Queue.dll for the message queuing service (LQserver.exe) in CA BrightStor ARCServe BackUp v9.01 through R11.5, and Enterprise Backup r10.5, allows remote attackers to execute arbitrary code via a malformed ONRPC protocol request for operati
How urgent is CVE-2007-5331?
Priority 59/100. Critical severity; EPSS top 4%: very likely to be exploited
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