CVE-2021-3578

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

A flaw was found in mbsync before v1.3.6 and v1.4.2, where an unchecked pointer cast allows a malicious or compromised server to write an arbitrary integer value past the end of a heap-allocated structure by issuing an unexpected APPENDUID response. This could be plausibly exploited for remote code execution on the client.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-704

Affected software

VendorProductVersions
n/aisyncisync 1.3.6, isync 1.4.2

References

Timeline

Published
Feb 16, 2022
Last modified
Jun 17, 2026
NVD status
Modified

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