CVE-2008-5180
MediumPublic exploitMicrosoft Communicator, and Communicator in Microsoft Office 2010 beta, allows remote attackers to cause a denial of service (memory consumption) via a large number of SIP INVITE requests, which trigger the creation of many sessions.
Published Nov 20, 2008 · Updated Apr 22, 2026
Key Facts
Patch immediately- CVE-2008-5180 is a medium-severity vulnerability (CVSS 5.3 v3.1) affecting Office Communicator (Microsoft).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 68% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is very likely to be exploited soon.
CVSS v3.1
5.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS (30-day exploit likelihood)
68%
Higher than 99.3% of all scored CVEs
Exploited in the wild
No known
Not in a known-exploited catalog
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2008-5180 brief as a PDF
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Description
Microsoft Communicator, and Communicator in Microsoft Office 2010 beta, allows remote attackers to cause a denial of service (memory consumption) via a large number of SIP INVITE requests, which trigger the creation of many sessions.
Affected Products
1 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Office CommunicatorMicrosoft | See advisory | n/a |
Timeline
Publicly disclosed
Nov 20, 2008
Last updated
Apr 22, 2026
Weakness Type
- CWE-770 Allocation of Resources Without Limits or Throttling
References
- advisorymicrosoft-communicator-invite-dos(46673)
- advisoryoffice-communicator-sip-dos(57581)
- advisory39221
- advisory1021294
- exploitExploitDB-12079
FAQ
Common Questions.
Microsoft Communicator, and Communicator in Microsoft Office 2010 beta, allows remote attackers to cause a denial of service (memory consumption) via a large number of SIP INVITE requests, which trigger the creation of many sessions.
Affected: Office Communicator (Microsoft). The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is very likely to be exploited soon.
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