CVE-2021-41093

Account takeover when having only access to a user's short lived token

CRITICAL
9.8
CVSS Score
Published: October 4, 2021 at 06:15 PM UTC
Updated: June 17, 2026 at 04:07 AM UTC
2 products affected across 2 vendorsWireWire

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Severity
CRITICAL9.8
Exploit prediction
EPSS 1%

Description

Wire is an open source secure messenger. In affected versions if the an attacker gets an old but valid access token they can take over an account by changing the email. This issue has been resolved in version 3.86 which uses a new endpoint which additionally requires an authentication cookie. See wire-ios-sync-engine and wire-ios-transport references. This is the root advisory that pulls the changes together.

Affected

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

v < 3.86
Affected range stops below 3.86, so it looks safe — our inference, not a vendor statement
v < 3.86
Affected range stops below 3.86, 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:

CVSS

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

Quick Info

StatusMODIFIED
CWE
CWE-285CWE-863

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