CVE-2011-0290: The BlackBerry Collaboration Service in Research In Motion (RIM) BlackBerry Enterprise Server (BES) 5.0.3 thro

This month

MEDIUM 6.5DOWNGRADE

CVE-2011-0290 is a medium-severity flaw (CVSS 6.5) affecting blackberry enterprise server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The BlackBerry Collaboration Service in Research In Motion (RIM) BlackBerry Enterprise Server (BES) 5.0.3 through MR4 for Microsoft Exchange and Lotus Domino allows remote authenticated users to log into arbitrary user accounts associated with the same organization, and send messages, read messages, read contact lists, or cause a denial of service (login unavailability), via unspecified vectors.

Why this priority

Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.5 (Medium)
EPSS exploit chance	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-264
Published	2011-10-21
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: rim

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2011-10-21 10:55 UTCPublished CVE record published
2026-06-16 23:27 UTCUpdated Record last modified

rim blackberry enterprise server DOWNGRADE

Affected: 5.0.3

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.0.3

1. Check installed version

apt-cache policy blackberry-enterprise-server || rpm -q blackberry-enterprise-server || blackberry-enterprise-server --version

2. No fixed release: DOWNGRADE to a release before 5.0.3 (Debian / Ubuntu)

apt-cache madison blackberry-enterprise-server sudo apt install blackberry-enterprise-server=<VERSION_BEFORE_5.0.3> sudo apt-mark hold blackberry-enterprise-server

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list blackberry-enterprise-server sudo dnf downgrade blackberry-enterprise-server-<VERSION_BEFORE_5.0.3> sudo dnf versionlock add blackberry-enterprise-server

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.

Quick answers

How do I fix CVE-2011-0290?

blackberry enterprise server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2011-0290 being exploited?

CVE-2011-0290 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-2011-0290 affect?

CVE-2011-0290 affects blackberry enterprise server. Severity is medium (CVSS 6.5). The BlackBerry Collaboration Service in Research In Motion (RIM) BlackBerry Enterprise Server (BES) 5.0.3 through MR4 for Microsoft Exchange and Lotus Domino allows remote authenticated users to log into arbitrary user accounts associated w

How urgent is CVE-2011-0290?

Priority 48/100. Public exploit reference

Software pages

Microsoft Exchange vulnerabilities

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References

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