CVE-2021-41093

Name: CVE-2021-41093
Creator: NVD / NIST
Published: 2021-10-04T19:15:08.203+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.44%

Last modified Jun 17, 2026

CVE-2021-41093 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 1.44% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.44%

69.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Wire	Wire	< 3.86

References

https://github.com/wireapp/wire-ios-sync-engine/security/advisories/GHSA-w727-5f74-49xjBroken Link
https://github.com/wireapp/wire-ios-transport/security/advisories/GHSA-p354-6r3m-g4xrBroken Link
https://github.com/wireapp/wire-ios/commit/b0e7bb3b13dd8212032cb46e32edf701694687c7Patch, Third Party Advisory
https://github.com/wireapp/wire-ios/security/advisories/GHSA-6f4c-phfj-m255Third Party Advisory
https://github.com/wireapp/wire-server/security/advisories/GHSA-9rm2-w6pq-333mThird Party Advisory
https://github.com/wireapp/wire-ios-sync-engine/security/advisories/GHSA-w727-5f74-49xjBroken Link
https://github.com/wireapp/wire-ios-transport/security/advisories/GHSA-p354-6r3m-g4xrBroken Link
https://github.com/wireapp/wire-ios/commit/b0e7bb3b13dd8212032cb46e32edf701694687c7Patch, Third Party Advisory
https://github.com/wireapp/wire-ios/security/advisories/GHSA-6f4c-phfj-m255Third Party Advisory
https://github.com/wireapp/wire-server/security/advisories/GHSA-9rm2-w6pq-333mThird Party Advisory

Timeline

Published: Oct 4, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-41093?

How severe is CVE-2021-41093?

CVE-2021-41093 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.44% probability of exploitation in the next 30 days.

How do I fix CVE-2021-41093?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-41093?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST