How severe is CVE-2025-48802?

CVE-2025-48802 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2025-48802 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-48802?

CVE-2025-48802 primarily affects Microsoft Windows 11 22h2. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2025-48802?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-48802 have an EU (EUVD) identifier?

Yes. CVE-2025-48802 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-20601.

When was CVE-2025-48802 published?

CVE-2025-48802 was published on 2025-07-08 and last updated on 2026-06-17.

CVE-2025-48802

CVE-2025-48802 is a medium-severity vulnerability in Microsoft Windows 11 22h2 with a CVSS 3.x base score of 6.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-20601
Weakness: CWE-295
Affected product: Microsoft Windows 11 22h2
Published: 2025-07-08
Last modified: 2026-06-17

Description

Improper certificate validation in Windows SMB allows an authorized attacker to perform spoofing over a network.

Frequently asked questions

What is CVE-2025-48802?: Improper certificate validation in Windows SMB allows an authorized attacker to perform spoofing over a network.
How severe is CVE-2025-48802?: CVE-2025-48802 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2025-48802 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-48802?: CVE-2025-48802 primarily affects Microsoft Windows 11 22h2. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2025-48802?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-48802 have an EU (EUVD) identifier?: Yes. CVE-2025-48802 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-20601.
When was CVE-2025-48802 published?: CVE-2025-48802 was published on 2025-07-08 and last updated on 2026-06-17.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-48802

Affected products (4)

cpe:2.3:o:microsoft:windows_11_22h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2022_23h2:*:*:*:*:*:*:*:*

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