CVE-2017-0143

CVE-2017-0143 is a high-severity vulnerability in Microsoft Server Message Block with a CVSS 3.x base score of 8.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2021-11-03).

Key facts

• Severity: High (CVSS 3.x base score 8.8)
• CVSS v2: 9.3
• EPSS exploit prediction: 93% (100th percentile)
• Actively exploited: Yes — listed in CISA KEV (added 2021-11-03)
• EU (EUVD) id: EUVD-2017-0510
• EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2021-11-03)
• Affected product: Microsoft Server Message Block
• Published: 2017-03-17
• Last modified: 2026-06-17

Description

The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; and Windows 10 Gold, 1511, and 1607; and Windows Server 2016 allows remote attackers to execute arbitrary code via crafted packets, aka "Windows SMB Remote Code Execution Vulnerability." This vulnerability is different from those described in CVE-2017-0144, CVE-2017-0145, CVE-2017-0146, and CVE-2017-0148.

Frequently asked questions

What is CVE-2017-0143?

The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; and Windows 10 Gold, 1511, and 1607; and Windows Server 2016 allows remote attackers to execute arbitrary code via crafted packets, aka "Windows SMB Remote Code Execution Vulnerability." This vulnerability is different from those described in CVE-2017-0144, CVE-2017-0145, CVE-2017-0146, and CVE-2017-0148.

How severe is CVE-2017-0143?

CVE-2017-0143 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2017-0143 being actively exploited?

Yes. CVE-2017-0143 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2021-11-03, which means active exploitation has been confirmed. It should be prioritised for remediation.

What products are affected by CVE-2017-0143?

CVE-2017-0143 primarily affects Microsoft Server Message Block. In total, 18 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2017-0143?

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-2017-0143 have an EU (EUVD) identifier?

Yes. CVE-2017-0143 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2017-0510. It is also flagged as exploited in the EUVD (since 2021-11-03).

When was CVE-2017-0143 published?

CVE-2017-0143 was published on 2017-03-17 and last updated on 2026-06-17.

References

• http://packetstormsecurity.com/files/154690/DOUBLEPULSAR-Payload-Execution-Neutralization.html
• http://packetstormsecurity.com/files/156196/SMB-DOUBLEPULSAR-Remote-Code-Execution.html
• http://www.securityfocus.com/bid/96703
• http://www.securitytracker.com/id/1037991
• https://cert-portal.siemens.com/productcert/pdf/ssa-701903.pdf
• https://cert-portal.siemens.com/productcert/pdf/ssa-966341.pdf
• https://ics-cert.us-cert.gov/advisories/ICSMA-18-058-02
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2017-0143
• https://www.exploit-db.com/exploits/41891/
• https://www.exploit-db.com/exploits/41987/
• https://www.exploit-db.com/exploits/43970/
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-0143

Affected products (18)

• cpe:2.3:a:microsoft:server_message_block:1.0:*:*:*:*:*:*:*
• cpe:2.3:a:philips:intellispace_portal:7.0:*:*:*:*:*:*:*
• cpe:2.3:a:philips:intellispace_portal:8.0:*:*:*:*:*:*:*
• cpe:2.3:o:siemens:acuson_p300_firmware:13.02:*:*:*:*:*:*:*
• cpe:2.3:o:siemens:acuson_p300_firmware:13.03:*:*:*:*:*:*:*
• cpe:2.3:o:siemens:acuson_p300_firmware:13.20:*:*:*:*:*:*:*
• cpe:2.3:o:siemens:acuson_p300_firmware:13.21:*:*:*:*:*:*:*
• cpe:2.3:o:siemens:acuson_p500_firmware:va10:*:*:*:*:*:*:*
• cpe:2.3:o:siemens:acuson_p500_firmware:vb10:*:*:*:*:*:*:*
• cpe:2.3:o:siemens:acuson_sc2000_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:siemens:acuson_sc2000_firmware:5.0a:*:*:*:*:*:*:*
• cpe:2.3:o:siemens:acuson_x700_firmware:1.0:*:*:*:*:*:*:*
• cpe:2.3:o:siemens:acuson_x700_firmware:1.1:*:*:*:*:*:*:*
• cpe:2.3:o:siemens:syngo_sc2000_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:siemens:syngo_sc2000_firmware:5.0a:*:*:*:*:*:*:*
• cpe:2.3:o:siemens:tissue_preparation_system_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:siemens:versant_kpcr_molecular_system_firmware:*:*:*:*:*:*:*:*
• cpe:2.3:o:siemens:versant_kpcr_sample_prep_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Microsoft Server Message Block

• CVE-2017-0146 — High (CVSS 8.8): The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1;…
• CVE-2017-0145 — High (CVSS 8.8): The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1;…
• CVE-2017-0144 — High (CVSS 8.8): The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1;…
• CVE-2017-0148 — High (CVSS 8.1): The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1;…

All CVEs affecting Microsoft Server Message Block →