Is CVE-2021-26090 in the CISA KEV catalog?

No. CVE-2021-26090 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-26090?

CVE-2021-26090 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2021-26090?

CVE-2021-26090 has an EPSS score of 1.33% (68th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-26090?

Upgrade fortimail to 6.4.5 or later.

CVE & CISA-KEV Catalog

CVE-2021-26090

MEDIUM

5.3

CVSS v3

NVD

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.

CWE-401Missing Release of Memory (Memory Leak)

How to fix

Remediation Available

fortimailNVD

Affected:>= 6.4.0, < 6.4.5Fixed in:6.4.5CVE-2021-26090derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityLow

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

Exploit Intelligence

1.33%probability of exploitation in 30 days

68thpercentile

Moderate risk: more likely to be exploited than 68% of all known CVEs.

References

Vendor Advisory1

fortiguard.com

Related Vulnerabilities

Other CWE-401 (Missing Release of Memory (Memory Leak)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-13934	High	7.5	64%	-	Fix
CVE-2016-6304	High	7.5	63%	-	Fix
CVE-2019-12265	Medium	5.3	55%	-	Fix
CVE-2001-0136	Medium	5.0	45%	-	-
CVE-2016-4232	High	7.5	36%	-	-
CVE-2001-0543	Medium	5.0	21%	-	-

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.