CVE-2009-2526

highpriority · attend · 70EPSS 0.819 · 100 %ileexploit · PoCEURUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

2 exploits · PoC

Likely / severe?

81.9% (100th) EPSS

CVSS 7.8 · high

Is it mine?

8 products

Check your exposure

Who says so?

3 sources

enisa_euvd · fstec_bdu · nvd

EPSS · scored 2026-10-27

Microsoft Windows Vista Gold, SP1, and SP2 and Server 2008 Gold and SP2 do not properly validate fields in SMBv2 packets, which allows remote attackers to cause a denial of service (infinite loop and system hang) via a crafted packet to the Server service, aka "SMBv2 Infinite Loop Vulnerability."

cvss

Technical severity, 0–10. One row per scoring source.

7.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Csecondary · FSTEC (BDU) RU

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:C/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-399USprimaryCWE-399US

exploits (2)

Public proof-of-concept and weaponised exploit code.

EDB-14674Microsoft Windows - 'srv2.sys' SMB Negotiate ProcessID Function Table Dereference (MS09-050)PoC · exploit_db
EDB-40280Microsoft Windows - 'srv2.sys' SMB Code Execution (Python) (MS09-050)PoC · exploit_db

affected products (8)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
Microsoft Corp Windows Server 2008all versionsfstec_bduRU
Microsoft Corp Windows Server 2008 Service Pack 2all versionsfstec_bduRU
Microsoft Corp Windows Vistaall versionsfstec_bduRU
Microsoft Corp Windows Vista Service Pack 1all versionsfstec_bduRU
Microsoft Corp Windows Vista Service Pack 2all versionsfstec_bduRU
microsoft windows server 2008all versionsnvdUScpe:2.3:o:microsoft:windows_server_2008:*:*:*:*:*:*:*:*
microsoft windows vistaall versionsnvdUScpe:2.3:o:microsoft:windows_vista:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd fstec_bdu nvd NVD CVE.org MITRE

published 2009-10-14modified 2026-06-16

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+3721 more

references (6)

External citations — patches, advisories, analysis.

scry

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