SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2011-1869

The Distributed File System (DFS) implementation in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote DFS servers to cause a…

HIGH 7.8EPSS 10.3%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 10.3%, higher than 96% of all known CVEs. Patch or mitigate before the next change window.

Description

The Distributed File System (DFS) implementation in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP1 and SP2, Windows Server 2008 Gold, SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 allows remote DFS servers to cause a denial of service (system hang) via a crafted referral response, aka "DFS Referral Response Vulnerability."

CVSS 2.0
7.8 HIGHAV:N/AC:L/Au:N/C:N/I:N/A:C
EPSS
10.29% probability · 96th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Weakness
CWE-399
Affected
microsoft/windows 2003 server · microsoft/windows 7 · microsoft/windows server 2003 · microsoft/windows server 2008 · microsoft/windows vista · microsoft/windows xp
Source
secure@microsoft.com
EPSS trend
0%8%15%26 October 2026: 10.29%26 October 202626 October 2026

EPSS 10.3% since 26 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.

Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.