CVE-2002-0939: The Install Wizard for nCipher MSCAPI CSP 5.50 does not use Operator Card Set protected keys when the user req

Routine

MEDIUM 4.6DOWNGRADE

CVE-2002-0939 is a medium-severity flaw (CVSS 4.6) affecting mscapi csp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The Install Wizard for nCipher MSCAPI CSP 5.50 does not use Operator Card Set protected keys when the user requests them but does not generate the Operator Card Set, which results in a lower protection level than specified by the user (module protection only).

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	4.6 (Medium)
EPSS exploit chance	0.3% (top 72%)
CISA exploited list	No
Published	2002-10-04
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: ncipher

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

Am I affected?

Timeline

2002-10-04 04:00 UTCPublished CVE record published
2026-06-16 21:58 UTCUpdated Record last modified

ncipher mscapi csp DOWNGRADE

Affected: 5.50 · 5.54

Fixed in: no fixed release known

Safe to downgrade to: a release before 5.50

1. Check installed version

apt-cache policy mscapi-csp || rpm -q mscapi-csp || mscapi-csp --version

2. No fixed release: DOWNGRADE to a release before 5.50 (Debian / Ubuntu)

apt-cache madison mscapi-csp sudo apt install mscapi-csp=<VERSION_BEFORE_5.50> sudo apt-mark hold mscapi-csp

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

dnf --showduplicates list mscapi-csp sudo dnf downgrade mscapi-csp-<VERSION_BEFORE_5.50> sudo dnf versionlock add mscapi-csp

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-2002-0939?

mscapi csp: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2002-0939 being exploited?

CVE-2002-0939 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-2002-0939 affect?

CVE-2002-0939 affects mscapi csp. Severity is medium (CVSS 4.6). The Install Wizard for nCipher MSCAPI CSP 5.50 does not use Operator Card Set protected keys when the user requests them but does not generate the Operator Card Set, which results in a lower protection level than specified by the user (modu

How urgent is CVE-2002-0939?

Priority 23/100. No elevated risk signals yet.

Related CVEs

CVE-2006-1115 LOW 2.6 MITIGATE DOWNGRADE nCipher HSM before 2.22.6, when generating a Diffie-Hellman public/private key pair without any specified Disc
CVE-2002-0940 MEDIUM 4.6 DOWNGRADE domesticinstall.exe for nCipher MSCAPI CSP 5.50 and 5.54 does not use Operator Card Set protected keys when th

References

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