Wire
CVE-2020-27853
CRITICAL
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Format string safety
|
| Impact | CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required. Public proof-of-concept exploit code is available. |
| 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 before 2020-10-16 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a format string. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
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Technical ContextAI · show details
This vulnerability is classified under CWE-134. Wire before 2020-10-16 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a format string. This affects Wire AVS (Audio, Video, and Signaling) 5.3 through 6.x before 6.4, the Wire Secure Messenger application before 3.49.918 for Android, and the Wire Secure Messenger application before 3.61 for iOS. This occurs via the value parameter to sdp_media_set_lattr in peerflow/sdp.c. Affected products include: Wire, Wire Wire - Audio\, Video\, And Signaling, Wire Wire Secure Messenger. Version information: before 2020.
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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 before 2020-10-16 allows remote attackers to cause a denial of service (application crash) or possibly execute arbitrary code via a format string. This affects Wire AVS (Audio, Video, and Signaling) 5.3 through 6.x before 6.4, the Wire Secure Messenger application before 3.49.918 for Android, and the Wire Secure Messenger application before 3.61 for iOS. This occurs via the value parameter to sdp_media_set_lattr in peerflow/sdp.c.
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
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.
Affected Products (CPE)NVD
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Due to how Wire handles type information in its serialization format, malicious payloads can be passed to a deserializer
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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 is an open source secure messenger. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable,
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