Windows Media Unicast Service in Windows Media Services 4.0 and 4.1 does not properly shut down some types of connections, producing a memor
Windows Media Unicast Service in Windows Media Services 4.0 and 4.1 does not properly shut down some types of connections, producing a memory leak that allows remote attackers to cause a denial of service via a series of severed connections, aka the "Severed Windows Media Server Connection" vulnerability.
- Published
- Feb 12, 2001
- Updated
- Jun 16, 2026
- EPSS
- 17.3% · 97th percentile
- CWE
- —
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Report tools
Action score
25
Monitor
Low priority for now.
- CVSS
- 20 / 40 · 5.0 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 5 / 30 · 17.3%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| microsoft | windows media services | cpe:2.3:a:microsoft:windows_media_services |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- microsoft windows media services4.0
- microsoft windows media services4.1
Same product
microsoft: all recordsOther highest-scoring records for the same primary product.
- CVE-2000-0495Microsoft Windows Media Encoder allows remote attackers to cause a denial of service via a malformed request, aka the "Malformed Windows Med30Monitor
- CVE-2003-0905Unknown vulnerability in Windows Media Station Service and Windows Media Monitor Service components of Windows Media Services 4.1 allows rem28Monitor
- CVE-2000-0211The Windows Media server allows remote attackers to cause a denial of service via a series of client handshake packets that are sent in an i26Monitor
- CVE-2000-0849Race condition in Microsoft Windows Media server allows remote attackers to cause a denial of service in the Windows Media Unicast Service v14Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- P · the service can be disrupted
- Attack complexity
- Low
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- P
Weakness class (CWE)
—
CVSS vector
AV:N/AC:L/Au:N/C:N/I:N/A:P
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- support.microsoft.com/default.aspx?scid=kb%3B%5BLN%5D%3BQ281256
- docs.microsoft.com/en-us/security-updates/securitybulletins/2000/ms00-097
- exchange.xforce.ibmcloud.com/vulnerabilities/5785
Vendor advisories and official records. Exploit/PoC links are deliberately left out.