CVE-2023-46116

Remote Code Execution via insufficiently sanitized call to shell.openExternal

HIGH
8.8
CVSS Score
Published: December 15, 2023 at 01:44 PM UTC
Updated: June 17, 2026 at 06:30 AM UTC
2 products affected across 2 vendorsTutanotaTutanota

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Severity
HIGH8.8
Exploit prediction
EPSS 1%
SSVC
PoC

Description

Tutanota (Tuta Mail) is an encrypted email provider. Tutanota allows users to open links in emails in external applications. Prior to version 3.118.12, it correctly blocks the `file:` URL scheme, which can be used by malicious actors to gain code execution on a victims computer, however fails to check other harmful schemes such as `ftp:`, `smb:`, etc. which can also be used. Successful exploitation of this vulnerability will enable an attacker to gain code execution on a victim's computer. Version 3.118.2 contains a patch for this issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 3.118.12
Affected range stops below 3.118.12, so it looks safe — our inference, not a vendor statement
v < 3.118.12
Affected range stops below 3.118.12, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20NVD-CWE-noinfo

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