Is CVE-2026-40305 in the CISA KEV catalog?

No. CVE-2026-40305 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-40305?

CVE-2026-40305 has a CVSS v3 base score of 4.3 (MEDIUM).

What is the EPSS score for CVE-2026-40305?

CVE-2026-40305 has an EPSS score of 0.18% (8th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-40305?

Upgrade dotnetnuke to 10.2.2 or later.

CVE & CISA-KEV Catalog

CVE-2026-40305

MEDIUM

4.3

CVSS v3

NVD

Description

DNN (formerly DotNetNuke) is an open-source web content management platform (CMS) in the Microsoft ecosystem. Starting in version 6.0.0 and prior to version 10.2.2, in the friends feature, a user could craft a request that would force the acceptance of a friend request on another user. Version 10.2.2 patches the issue.

CWE-285

How to fix

Remediation Available

dotnetnukeNVD

Affected:>= 6.0.0, < 10.2.2Fixed in:10.2.2CVE-2026-40305derived 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 RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.18%probability of exploitation in 30 days

8thpercentile

Low risk: more likely to be exploited than 8% of all known CVEs.

References

Vendor Advisory1

github.com

Release Notes1

github.com

Related Vulnerabilities

Other CWE-285 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-29927	Critical	9.1	100%	-	Fix
CVE-2021-28799	Critical	10.0	78%	KEV + Ransom	Fix
CVE-2023-32707	High	8.8	74%	-	Fix
CVE-2023-48241	High	7.5	73%	-	Fix
CVE-2023-22480	High	7.3	67%	-	Fix
CVE-2022-3229	Critical	9.8	66%	-	-

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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 2026-04-24.