cvedb.io
CVE-2021-3657
CRITICAL · CVSS 9.8
EPSS exploitation probability: 0%
Published 2022-02-18T18:15:09.603 · Last modified 2026-06-17T04:05:31.000

Summary

A flaw was found in mbsync versions prior to 1.4.4. Due to inadequate handling of extremely large (>=2GiB) IMAP literals, malicious or compromised IMAP servers, and hypothetically even external email senders, could cause several different buffer overflows, which could conceivably be exploited for remote code execution.

Affected products

isync_project — isync

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.