Office Communicator vulnerabilitiesRanked by how likely they are to be used.

Product2 versions
The short answer

Office Communicator is made by Microsoft. We track 7 published vulnerabilities in it, across 2 versions. None of them is on the list of flaws known to be exploited today. If you run Office Communicator, keep it on a version the vendor still supports.

See the riskiest flaws

We keep watching the known-exploited list.

Known exploited

Which Office Communicator vulnerabilities are being exploited?

This is the list that matters most: flaws criminals are using now.

None of Office Communicator's published vulnerabilities is on the list of flaws known to be exploited today. We keep watching that list.

Exploit likelihood

Which Office Communicator flaws are most likely to be used?

Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.

50% or more10% to 49%Under 10%
  1. 68%

    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...

    CVSS5.3Published20 Nov 2008
  2. 22%

    Microsoft Communicator 2007 R2, Lync 2010, Lync 2010 Attendee, and Lync Server 2013 do not properly handle objects in memory, which allows remote attackers to execute arbitrary code via an invitation that triggers...

    CVSS9.3Published15 May 2013
  3. 17%

    Microsoft Crypto API 5.131.2600.2180 through 6.0, as used in Outlook, Windows Live Mail, and Office 2007, performs Certificate Revocation List (CRL) checks by using an arbitrary URL from a certificate embedded in a...

    CVSS7.5Published7 Jul 2008
  4. 16%

    Unspecified vulnerability in Microsoft Office Communications Server (OCS), Office Communicator, and Windows Live Messenger allows remote attackers to cause a denial of service (crash) via a crafted Real-time...

    CVSS5.0Published20 Nov 2008
  5. 13%

    Microsoft Communicator allows remote attackers to cause a denial of service (application or device outage) via instant messages containing large numbers of emoticons.

    CVSS5.0Published20 Nov 2008
Precursor Intelligence

Running Office Communicator? We'll keep checking.

Looking flaws up one at a time doesn't scale. Tell us what you run once, and we tell you which flaws matter to you, in what order, and keep watching for new ones.

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  2. We match it to every flawOver 400,000 published flaws, checked against your list.
  3. Ranked by real-world riskA 0 to 100 score, led by evidence criminals are using it.
  4. Told as soon as we knowAn alert by email, in the app or by webhook to your own tools.

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FAQ

Common questions, answered plainly.

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We track 7 published vulnerabilities listed under the name Office Communicator, across 2 versions.

None of Office Communicator's vulnerabilities is on the list of flaws known to be exploited today.

Create a Precursor Intelligence account and track Office Communicator. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.