CVE-2009-1537

Exploitation

Exploited in the wild. Listed in the CISA Known Exploited Vulnerabilities catalog on 2026-05-20. Federal remediation due 2026-06-03.

SSVC decision

• ExploitationactiveCISA reports credible evidence of active exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

51.21% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 98.8% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-16.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2009-05-29 18:00Z17 YR AGO

Last updated

2026-05-21 03:55Z3 MO AGO

Reserved

2009-05-05

Assigning CNA

microsoft

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weaknesses

• CWE-158Improper Neutralization of Null Byte or NUL CharacterVariant

Data version

5.2

Document digest

14e091524cdd98ac89a6299bf6dd785a669573e9c56293be809a4353afb04ee6

• docs.microsoft.comMS09-028https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-028vendor-advisoryx_refsource_MS
• blogs.technet.comhttp://blogs.technet.com/srd/archive/2009/05/28/new-vulnerability-in-quicktime-parsing.aspxx_refsource_CONFIRM
• oval.cisecurity.orgoval:org.mitre.oval:def:6237https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6237vdb-entrysignaturex_refsource_OVAL
• secunia.com35268http://secunia.com/advisories/35268third-party-advisoryx_refsource_SECUNIA
• www.securitytracker.com1022299http://www.securitytracker.com/id?1022299vdb-entryx_refsource_SECTRACK
• www.vupen.comADV-2009-1886http://www.vupen.com/english/advisories/2009/1886vdb-entryx_refsource_VUPEN
• www.vupen.comADV-2009-1445http://www.vupen.com/english/advisories/2009/1445vdb-entryx_refsource_VUPEN
• osvdb.org54797http://osvdb.org/54797vdb-entryx_refsource_OSVDB
• www.securityfocus.com35139http://www.securityfocus.com/bid/35139vdb-entryx_refsource_BID
• www.us-cert.govTA09-195Ahttp://www.us-cert.gov/cas/techalerts/TA09-195A.htmlthird-party-advisoryx_refsource_CERT
• isc.sans.orghttp://isc.sans.org/diary.html?storyid=6481x_refsource_MISC
• www.microsoft.comhttp://www.microsoft.com/technet/security/advisory/971778.mspxx_refsource_CONFIRM
• blogs.technet.comhttp://blogs.technet.com/msrc/archive/2009/05/28/microsoft-security-advisory-971778-vulnerability-in-microsoft-directshow-released.aspxx_refsource_CONFIRM
• www.cisa.govhttps://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-1537government-resource