CVE-2021-32666— Asset DoS vulnerability
Quick assessment
Affected
wireapp wire-ios
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Wire是个人开发者的一款聊天软件。该软件支持 Web、WindowsiOS、Android、OS X 平台，有群组功能，可以语音通话，发送照片以及其独创性的打招呼方式 PING。 wireapp wire-ios存在安全漏洞，该漏洞源于Wire-iOS 3.8.0版本及之前的版本中，存在一个可以导致用户之间拒绝服务的漏洞。如果如果用户头像的assetID无效，并且包含"字符，它将导致iOS客户端崩溃。
Possible ATT&CK Techniques 1 AI
T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2021-32666
Vulnerability Information
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Vulnerability Title
Asset DoS vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
wire-ios is the iOS version of Wire, an open-source secure messaging app. In wire-ios versions 3.8.0 and prior, a vulnerability exists that can cause a denial of service between users. If a user has an invalid assetID for their profile picture and it contains the " character, it will cause the iOS client to crash. The vulnerability is patched in wire-ios version 3.8.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
wireapp wire-ios 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wire是个人开发者的一款聊天软件。该软件支持 Web、WindowsiOS、Android、OS X 平台，有群组功能，可以语音通话，发送照片以及其独创性的打招呼方式 PING。 wireapp wire-ios存在安全漏洞，该漏洞源于Wire-iOS 3.8.0版本及之前的版本中，存在一个可以导致用户之间拒绝服务的漏洞。如果如果用户头像的assetID无效，并且包含"字符，它将导致iOS客户端崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2021-32666
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Patches & Fixes for CVE-2021-32666 (1)
Vendor Advisories for CVE-2021-32666 (1)
-
https://github.com/wireapp/wire-ios/security/advisories/GHSA-2x9x-vh27-h4rv x_refsource_CONFIRM
IV. Related Vulnerabilities
Same product: wire-ios
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CVE-2026-35049
wire-ios has Persistent Remote DoS via Integer Underflow -
CVE-2025-49846
wire-ios accidentally logs message contents -
CVE-2022-31009
DoS vulnerability: Invalid Accent Colors -
CVE-2022-23625
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CVE-2021-41094
Mandatory encryption at rest can be bypassed (UI) in Wire ap
Same vendor: wireapp
-
CVE-2026-35049
wire-ios has Persistent Remote DoS via Integer Underflow -
CVE-2025-49846
wire-ios accidentally logs message contents -
CVE-2025-48066
wire-webapp has no database deletion on client logout -
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wire-webapp Has Insufficient Session Invalidation after User -
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Same weakness: CWE-20
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Insufficient input validation vulnerability in NETGEAR R7300 -
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Insufficient input validation vulnerability in NETGEAR R7300 -
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Insufficient input validation vulnerability exists in websit -
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V. Comments for CVE-2021-32666
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