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CVE-2021-26090

HIGH
7.5
CVSS Score
Published: July 12, 2021 at 12:53 PM UTC
Updated: June 17, 2026 at 03:42 AM UTC
1 product affected across 1 vendorFortiMail

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Severity
HIGH7.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

Description

A missing release of memory after its effective lifetime vulnerability in the Webmail of FortiMail 6.4.0 through 6.4.4 and 6.2.0 through 6.2.6 may allow an unauthenticated remote attacker to exhaust available memory via specifically crafted login requests.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

FortiMail· Fortinet
95%
v ≤ 6.4.46.2.0 ≤ v ≤ 6.2.66.4.0 ≤ v < 6.4.5
Affected range stops below 6.4.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://fortiguard.com/advisory/FG-IR-21-042

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-401

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