TI-2018-00774 Aliases CVE-2018-0833 GHSA-m84f-8362-3v3c

NULL pointer dereference in Microsoft Server Message Block

MEDIUM 52CWE-476Published 2018-02-15 · Updated 2024-09-17

Key facts

Attack vector: Network
Privileges required: Low
User interaction: None
Attack complexity: High
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-476.

Summary

The Microsoft Server Message Block 2.0 and 3.0 (SMBv2/SMBv3) client in Windows 8.1 and RT 8.1 and Windows Server 2012 R2 allows a denial of service vulnerability due to how specially crafted requests are handled, aka "SMBv2/SMBv3 Null Dereference Denial of Service Vulnerability".

Why it matters now

EPSS 0.40159 98th percentileScored 2026-11-07

Public exploit Yes 2 exploit referencesTagged by NVD and the CNA

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Microsoft	Server Message Block	Windows 8.1 and RT 8.1 and Windows Server 2012 R2	—	No fix listed	CNA

Server Message Block VendorMicrosoft Affected Windows 8.1 and RT 8.1 and Windows Server 2012 R2 Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPE	Versions	Role	Vendor
cpe:2.3:o:microsoft:windows_8.1:-:::::::*	not specified by NVD	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_rt_8.1:-:::::::*	not specified by NVD	Vulnerable	Microsoft
cpe:2.3:o:microsoft:windows_server_2012:r2:::::::*	r2	Vulnerable	Microsoft

cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_rt_8.1:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Microsoft
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:* Versions r2 Vulnerable ·Microsoft

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2018-0833
2026-10-03 Alias added: GHSA-m84f-8362-3v3c

References

Exploit 2

Patch 1

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-0833

TI-2017-06077 Microsoft Windows XP SP3, Windows XP x64 XP2, Windows Server 2003 SP2, Windows Vista… KEVCVSS 3.1CRITICAL 9.8
TI-2015-01465 HTTP.sys in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8, Windows 8.1… KEVCVSS 3.1CRITICAL 9.8
TI-2022-19649 Windows Scripting Languages Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
TI-2022-10154 Active Directory Domain Services Elevation of Privilege Vulnerability KEVCVSS 3.1HIGH 8.8
TI-2021-17496 Microsoft MSHTML Remote Code Execution Vulnerability KEVCVSS 3.1HIGH 8.8
TI-2021-13480 Scripting Engine Memory Corruption Vulnerability KEVCVSS 3.1HIGH 8.8

See all 2214 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences