Microsoft SMBv1 Server Remote Code Execution Vulnerability
The SMBv1 server in Microsoft allows remote attackers to execute arbitrary code via crafted packets.
- Vendor
- Microsoft
- Product
- SMBv1 server
- CVSS
- 8.1
- EPSS (exploit probability)
- 99.4%
- Status
- kevransomware use
- CISA patch-by (BOD 22-01)
- Added to KEV
Is CVE-2017-0148 being exploited?
Yes. CISA added CVE-2017-0148 to its Known Exploited Vulnerabilities catalog on . CISA only lists a CVE when it has reliable evidence of exploitation in the wild. CISA marks it as known to be used in ransomware campaigns.
FIRST's EPSS model puts the probability of exploitation activity in the next 30 days at 99.4% (scored November 4, 2026).
- CISA KEV[ LISTED ]
- ENISA EUVD (exploited)[ — ]
- CIRCL KEV[ — ]
Catalog snapshot 2026-11-13. Full cross-catalog view: /kev-comparison
CVE-2017-0148 timeline
Every event links to its source. Catalog dates are each catalog's own; day offsets count from NVD publication. Data: JSON
What to do
CISA required actionApply updates per vendor instructions.
US federal civilian agencies must remediate by (21 days after listing) under BOD 22-01. Everyone else: that deadline is a sensible upper bound, not a target. Vendor guidance and the NVD record are linked under Source above.
Other Microsoft SMBv1 CVEs we track
| CVE / Vulnerability | Severity | CVSS | EPSS | Added to KEV |
|---|---|---|---|---|
| CVE-2017-0147 Microsoft Windows SMBv1 Information Disclosure Vulnerabilityransomware use | [ HIGH ] | 7.5 | 99.7% | |
| CVE-2017-0145 Microsoft SMBv1 Remote Code Execution Vulnerabilityransomware use | [ HIGH ] | 8.8 | 89.8% | |
| CVE-2017-0144 Microsoft SMBv1 Remote Code Execution Vulnerabilityransomware use | [ HIGH ] | 8.8 | 99.2% |