How severe is CVE-2024-23655?

CVE-2024-23655 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-23655 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-23655?

CVE-2024-23655 affects Tuta Tutanota. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-23655?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2024-23655 have an EU (EUVD) identifier?

Yes. CVE-2024-23655 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-21130.

When was CVE-2024-23655 published?

CVE-2024-23655 was published on 2024-01-25 and last updated on 2026-06-17.

CVE-2024-23655

CVE-2024-23655 is a high-severity vulnerability in Tuta Tutanota with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-21130
Weakness: CWE-20
Affected product: Tuta Tutanota
Published: 2024-01-25
Last modified: 2026-06-17

Description

Tuta is an encrypted email service. Starting in version 3.118.12 and prior to version 3.119.10, an attacker is able to send a manipulated email so that the user can no longer use the app to get access to received emails. By sending a manipulated email, an attacker could put the app into an unusable state. In this case, a user can no longer access received e-mails. Since the vulnerability affects not only the app, but also the web application, a user in this case has no way to access received emails. This issue was tested with iOS and the web app, but it is possible all clients are affected. Version 3.119.10 fixes this issue.

Frequently asked questions

What is CVE-2024-23655?: Tuta is an encrypted email service. Starting in version 3.118.12 and prior to version 3.119.10, an attacker is able to send a manipulated email so that the user can no longer use the app to get access to received emails. By sending a manipulated email, an attacker could put the app into an unusable state. In this case, a user can no longer access received e-mails. Since the vulnerability affects not only the app, but also the web application, a user in this case has no way to access received emails. This issue was tested with iOS and the web app, but it is possible all clients are affected. Version 3.119.10 fixes this issue.
How severe is CVE-2024-23655?: CVE-2024-23655 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-23655 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-23655?: CVE-2024-23655 affects Tuta Tutanota. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-23655?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-23655 have an EU (EUVD) identifier?: Yes. CVE-2024-23655 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-21130.
When was CVE-2024-23655 published?: CVE-2024-23655 was published on 2024-01-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:tuta:tutanota:*:*:*:*:*:*:*:*

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