CVE-2003-0818

highpriority · attend · 69EPSS 0.822 · 100 %ileexploit · functionalEUUS

grimoire priorityP1 · Urgent

Exploitable?

Public exploit

4 exploits · functional

Likely / severe?

82.2% (100th) EPSS

CVSS 7.5 · high

Is it mine?

9 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-22

Multiple integer overflows in Microsoft ASN.1 library (MSASN1.DLL), as used in LSASS.EXE, CRYPT32.DLL, and other Microsoft executables and libraries on Windows NT 4.0, 2000, and XP, allow remote attackers to execute arbitrary code via ASN.1 BER encodings with (1) very large length fields that cause arbitrary heap data to be overwritten, or (2) modified bit strings.

cvss

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

7.5

010

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

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:Pprimary · NVD / NIST USexploitability 10 · impact 6.4

v2.07.5highAV:N/AC:L/Au:N/C:P/I:P/A:P/E:Hsecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-122USLLM-inferredCWE-190USLLM-inferred

exploits (4)

Public proof-of-concept and weaponised exploit code.

EDB-153Microsoft Windows - ASN.1 'LSASS.exe' Remote Denial of Service (MS04-007)functional · exploit_db
EDB-16377Microsoft Windows - ASN.1 Library Bitstring Heap Overflow (MS04-007) (Metasploit)functional · exploit_db
EDB-3022Microsoft Windows - ASN.1 Remote (MS04-007)functional · exploit_db
exploit/windows/smb/ms04_007_killbillMS04-007 Microsoft ASN.1 Library Bitstring Heap OverflowPoC · metasploit

affected products (9)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
microsoft windows 2000all versionsnvdUScpe:2.3:o:microsoft:windows_2000:*:*:*:*:*:*:*:*
microsoft windows 2003 server= enterprisenvdUScpe:2.3:o:microsoft:windows_2003_server:*:*:*:*:*:*:*:*
microsoft windows 2003 server= enterprise_64-bitnvdUScpe:2.3:o:microsoft:windows_2003_server:*:*:*:*:*:*:*:*
microsoft windows 2003 server= r2nvdUScpe:2.3:o:microsoft:windows_2003_server:*:*:*:*:*:*:*:*
microsoft windows 2003 server= standardnvdUScpe:2.3:o:microsoft:windows_2003_server:*:*:*:*:*:*:*:*
microsoft windows 2003 server= webnvdUScpe:2.3:o:microsoft:windows_2003_server:*:*:*:*:*:*:*:*
microsoft windows nt= 4.0nvdUScpe:2.3:o:microsoft:windows_nt:*:*:*:*:*:*:*:*
microsoft windows xpall versionsnvdUScpe:2.3:o:microsoft:windows_xp:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2004-03-03modified 2026-06-16

references (24)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan