CVE-2006-1116: The CBC-MAC integrity functions in the nCipher nCore API before 2.18 transmit the initialization vector IV as

Routine

MEDIUM 5.0DOWNGRADE

CVE-2006-1116 is a medium-severity flaw (CVSS 5.0) affecting ncore. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The CBC-MAC integrity functions in the nCipher nCore API before 2.18 transmit the initialization vector IV as part of a message when the implementation uses a non-zero IV, which allows remote attackers to bypass integrity checks and modify messages without being detected.

Why this priority

No elevated risk signals yet

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

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	1.6% (top 25%)
CISA exploited list	No
Published	2006-03-09
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

2006-03-09 13:06 UTCPublished CVE record published
2026-06-16 22:22 UTCUpdated Record last modified

ncipher ncore DOWNGRADE

Affected: 2.17

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.17

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 2.17 (Debian / Ubuntu)

apt-cache madison ncore sudo apt install ncore=<VERSION_BEFORE_2.17> sudo apt-mark hold ncore

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

dnf --showduplicates list ncore sudo dnf downgrade ncore-<VERSION_BEFORE_2.17> sudo dnf versionlock add ncore

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-2006-1116?

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

Is CVE-2006-1116 being exploited?

CVE-2006-1116 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-2006-1116 affect?

CVE-2006-1116 affects ncore. Severity is medium (CVSS 5.0). The CBC-MAC integrity functions in the nCipher nCore API before 2.18 transmit the initialization vector IV as part of a message when the implementation uses a non-zero IV, which allows remote attackers to bypass integrity checks and modify

How urgent is CVE-2006-1116?

Priority 36/100. No elevated risk signals yet.

Related CVEs

CVE-2006-1117 LOW 2.6 MITIGATE MITIGATE nCipher firmware before V10, as used by (1) nShield, (2) nForce, (3) netHSM, (4) payShield, (5) SecureDB, (6)

References

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