CVE-2021-32021: A denial of service vulnerability in the message broker of BlackBerry Protect for Windows version(s) versions

Q: How do I fix CVE-2021-32021?

protect: upgrade to newer than 1574. Exact commands for each OS are on this page.

Q: Is CVE-2021-32021 being exploited?

CVE-2021-32021 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-32021 affect?

CVE-2021-32021 affects protect. Severity is high (CVSS 7.8). A denial of service vulnerability in the message broker of BlackBerry Protect for Windows version(s) versions 1574 and earlier could allow an attacker to potentially execute code in the context of a BlackBerry Cylance service that has admin

Routine

HIGH 7.8UPGRADE

CVE-2021-32021 is a high-severity flaw (CVSS 7.8) affecting protect. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A denial of service vulnerability in the message broker of BlackBerry Protect for Windows version(s) versions 1574 and earlier could allow an attacker to potentially execute code in the context of a BlackBerry Cylance service that has admin rights on the system.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Published	2021-11-10
Last modified	2026-06-17

Publisher (CNA): BlackBerry · Vendor: blackberry

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

Am I affected?

Timeline

2021-11-10 18:15 UTCPublished CVE record published
2026-06-17 03:52 UTCUpdated Record last modified

blackberry protect UPGRADE

Affected: <= 1574

Fixed in: newer than 1574

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy protect || rpm -q protect || protect --version

2. UPGRADE to newer than 1574 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade protect

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade protect

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-2021-32021?

protect: upgrade to newer than 1574. Exact commands for each OS are on this page.

Is CVE-2021-32021 being exploited?

CVE-2021-32021 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-2021-32021 affect?

CVE-2021-32021 affects protect. Severity is high (CVSS 7.8). A denial of service vulnerability in the message broker of BlackBerry Protect for Windows version(s) versions 1574 and earlier could allow an attacker to potentially execute code in the context of a BlackBerry Cylance service that has admin

How urgent is CVE-2021-32021?

Priority 33/100. High severity

Software pages

Windows vulnerabilities

Related CVEs

CVE-2022-31464 HIGH 7.8 DOWNGRADE Insecure permissions configuration in Adaware Protect v1.2.439.4251 allows attackers to escalate privileges vi
CVE-2021-32023 HIGH 7.8 UPGRADE An elevation of privilege vulnerability in the message broker of BlackBerry Protect for Windows version(s) ver
CVE-2021-32022 MEDIUM 5.5 UPGRADE A low privileged delete vulnerability using CEF RPC server of BlackBerry Protect for Windows version(s) versio

References

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