A missing cryptographic step in the implementation of the hash digest algorithm in FortiMail 6.4.0 through 6.4.4, and 6.2.0 through 6.2.7 may allow an unauthenticated attacker to tamper with signed URLs by appending further data which allows bypass of signature verification.

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Advisories
Source ID Title
EUVD EUVD EUVD-2021-10940 A missing cryptographic step in the implementation of the hash digest algorithm in FortiMail 6.4.0 through 6.4.4, and 6.2.0 through 6.2.7 may allow an unauthenticated attacker to tamper with signed URLs by appending further data which allows bypass of signature verification.
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 24 Feb 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: fortinet

Published:

Updated: 2024-10-25T13:57:25.857Z

Reserved: 2021-01-13T00:00:00.000Z

Link: CVE-2021-24020

cve-icon Vulnrichment

Updated: 2024-08-03T19:14:10.061Z

cve-icon NVD

Status : Modified

Published: 2021-07-09T19:15:08.197

Modified: 2024-11-21T05:52:13.380

Link: CVE-2021-24020

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses