Wire
CVE-2021-41093
CRITICAL
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A01:2025 - Broken Access Control
ASVS 5.0
V8 - Authorization Authorization verification
MITRE ATT&CK
1 technique across 1 tactic: Defense Evasion The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system. |
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Alert meAnalysisAI
Wire is an open source secure messenger. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.
RemediationAI
A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affects your stack
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Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified under CWE-285. 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 products include: Wire. Version information: version 3.86.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
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.
Threat Intelligence Overview
NVD
CVE.org
EPSS
GitHub
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.
Affected Products (CPE)NVD
Wire before 2020-10-16 allows remote attackers to cause a denial of service (application crash) or possibly execute arbi
Restund is an open source NAT traversal server. Rated critical severity (CVSS 9.6), this vulnerability is remotely explo
Due to how Wire handles type information in its serialization format, malicious payloads can be passed to a deserializer
In Wire before 3.20.x, `shell.openExternal` was used without checking the URL. Rated high severity (CVSS 8.0), this vuln
Denial of service in Square Wire (the gRPC/protobuf runtime for Kotlin, Java, Swift, and Android) affects all releases b
The Wire application before 2018-03-07 for Android allows attackers to write to pathnames outside of the downloads direc
wire-webapp is the web version of Wire, an open-source messenger. Rated medium severity (CVSS 6.1), this vulnerability i
Wire-server is the backing server for the open source wire secure messaging application. Rated critical severity (CVSS 9
wire-avs provides Audio, Visual, and Signaling (AVS) functionality sure the secure messaging software Wire. Rated high s
Wire through 3.22.3993 on Windows advertises deletion of sent messages; nonetheless, all messages can be retrieved (for
Wire is an encrypted communication and collaboration platform. Rated high severity (CVSS 8.1), this vulnerability is rem
wire-server provides back end services for Wire, an open source messenger. Rated high severity (CVSS 8.1), this vulnerab
Exploit-DB