How severe is CVE-2019-0703?

CVE-2019-0703 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 high, integrity none, and availability none.

Is CVE-2019-0703 being actively exploited?

Yes. CVE-2019-0703 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-05-23, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2019-0703?

CVE-2019-0703 primarily affects Microsoft Windows 10 1507. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-0703?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.

Does CVE-2019-0703 have an EU (EUVD) identifier?

Yes. CVE-2019-0703 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-1463. It is also flagged as exploited in the EUVD (since 2022-05-23).

When was CVE-2019-0703 published?

CVE-2019-0703 was published on 2019-04-09 and last updated on 2026-06-17.

CVE-2019-0703

CVE-2019-0703 is a medium-severity vulnerability in Microsoft Windows 10 1507 with a CVSS 3.x base score of 6.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-05-23).

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 10% (95th percentile)
Actively exploited: Yes — listed in CISA KEV (added 2022-05-23)
EU (EUVD) id: EUVD-2019-1463
EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2022-05-23)
Affected product: Microsoft Windows 10 1507
Published: 2019-04-09
Last modified: 2026-06-17

Description

An information disclosure vulnerability exists in the way that the Windows SMB Server handles certain requests, aka 'Windows SMB Information Disclosure Vulnerability'. This CVE ID is unique from CVE-2019-0704, CVE-2019-0821.

Frequently asked questions

What is CVE-2019-0703?: An information disclosure vulnerability exists in the way that the Windows SMB Server handles certain requests, aka 'Windows SMB Information Disclosure Vulnerability'. This CVE ID is unique from CVE-2019-0704, CVE-2019-0821.
How severe is CVE-2019-0703?: CVE-2019-0703 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 high, integrity none, and availability none.
Is CVE-2019-0703 being actively exploited?: Yes. CVE-2019-0703 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-05-23, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2019-0703?: CVE-2019-0703 primarily affects Microsoft Windows 10 1507. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-0703?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2019-0703 have an EU (EUVD) identifier?: Yes. CVE-2019-0703 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-1463. It is also flagged as exploited in the EUVD (since 2022-05-23).
When was CVE-2019-0703 published?: CVE-2019-0703 was published on 2019-04-09 and last updated on 2026-06-17.

References

Affected products (23)

cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1507:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1607:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1703:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1703:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_10_1709:-:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1803:-:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:arm64:*
cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_10_1809:-:*:*:*:*:*:x86:*
cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_1709:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_1803:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:itanium:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:x64:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2016:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2019:-:*:*:*:*:*:*:*

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