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CVE-2021-26099

MEDIUMCVSS 4.9/10EPSS 0.55%

Last modified

CVE-2021-26099 is a medium-severity vulnerability rated 4.9/10 on the CVSS scale. Missing cryptographic steps in the Identity-Based Encryption service of FortiMail before 7.0.0 may allow an attacker who comes in possession of the encrypted master keys to compromise their confidentiality by observing a few invariant properties of the ciphertext.. EPSS estimates a 0.55% chance of exploitation in the next 30 days.

Description

Missing cryptographic steps in the Identity-Based Encryption service of FortiMail before 7.0.0 may allow an attacker who comes in possession of the encrypted master keys to compromise their confidentiality by observing a few invariant properties of the ciphertext.

Metrics

CVSS 3.1
4.9/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

EPSS Probability
0.55%

41.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
FortinetFortimail>= 5.0, < 7.0.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-26099?
Missing cryptographic steps in the Identity-Based Encryption service of FortiMail before 7.0.0 may allow an attacker who comes in possession of the encrypted master keys to compromise their confidentiality by observing a few invariant properties of the ciphertext.
How severe is CVE-2021-26099?
CVE-2021-26099 has a CVSS score of 4.9/10 (MEDIUM severity). The EPSS model estimates a 0.55% probability of exploitation in the next 30 days.
How do I fix CVE-2021-26099?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-26099?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST