SOC status:Duty analyst on shift

UK Cyber Defence
VulnerabilityModified

CVE-2012-2551

The server in Kerberos in Microsoft Windows Server 2008 R2 and R2 SP1, and Windows 7 Gold and SP1, allows remote attackers to cause a denial of service (NULL pointer dereference and reboot) via a crafted session request, aka "Kerberos NULL Dereference…

MEDIUM 5.0EPSS 27.5%

Does this matter?

EPSS puts the probability of exploitation in the next 30 days at 27.5%, higher than 98% of all known CVEs. Patch or mitigate before the next change window.

Description

The server in Kerberos in Microsoft Windows Server 2008 R2 and R2 SP1, and Windows 7 Gold and SP1, allows remote attackers to cause a denial of service (NULL pointer dereference and reboot) via a crafted session request, aka "Kerberos NULL Dereference Vulnerability."

CVSS 2.0
5.0 MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
EPSS
27.48% probability · 98th percentile
Public exploits
None in Exploit-DB
CISA KEV
Not listed
Affected
microsoft/windows 7 · microsoft/windows server 2008
Source
secure@microsoft.com
EPSS trend
0%15%30%4 November 2026: 27.48%4 November 20264 November 2026

EPSS 27.5% since 4 November 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.