CVE-2019-0703
MediumExploitedPublic exploitAn information disclosure vulnerability exists in the way that the Windows SMB Server handles certain requests, aka 'Windows SMB Information Disclosure Vulnerability'.
Published Apr 8, 2019 · Updated Oct 29, 2025
Key Facts
Patch immediately- CVE-2019-0703 is a medium-severity vulnerability (CVSS 6.5 v3.1) affecting Windows 10 1507 (Microsoft), Windows 10 1607 (Microsoft), Windows 10 1703 (Microsoft) and 14 more products.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 12, 2019. Public exploit code is available.
- EPSS estimates a 9.6% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
6.5
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS (30-day exploit likelihood)
9.6%
Higher than 95.4% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2019-0703 brief as a PDF
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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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | May 23, 2022 | Jun 13, 2022 | Not reported |
| Industry KEV feed | Mar 12, 2019 | Jun 13, 2022 | Not reported |
| CIRCL KEV | May 23, 2022 | Jun 13, 2022 | Not reported |
| ENISA EUVD | May 23, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
25 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 10 1507Microsoft | See advisory | n/a |
| Windows 10 1607Microsoft | See advisory | n/a |
| Windows 10 1703Microsoft | See advisory | n/a |
| Windows 10 1709Microsoft | See advisory | n/a |
| Windows 10 1803Microsoft | See advisory | n/a |
Timeline
Added to Industry KEV feed
Mar 12, 2019
Publicly disclosed
Apr 8, 2019
Added to CISA KEV
May 23, 2022
Added to CIRCL KEV
May 23, 2022
Added to ENISA EUVD
May 23, 2022
Last updated
Oct 29, 2025
References
FAQ
Common Questions.
An information disclosure vulnerability exists in the way that the Windows SMB Server handles certain requests, aka 'Windows SMB Information Disclosure Vulnerability'.
Affected: Windows 10 1507 (Microsoft); Windows 10 1607 (Microsoft); Windows 10 1703 (Microsoft), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 12, 2019.
Yes. It was added on May 23, 2022 with a federal remediation due date of Jun 13, 2022.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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