Windows 98 vulnerabilitiesRanked by how likely they are to be used.

Product1 versions
The short answer

Windows 98 is made by Microsoft. We track 101 published vulnerabilities listed under that exact name, across 1 version. None of them is on the list of flaws known to be exploited today. Microsoft lists newer releases under their own names, such as Windows 98 Plus Pack, so check those pages too.

See the riskiest flaws

We keep watching the known-exploited list.

Other names

Is Windows 98 listed under other names? Yes.

Microsoft also lists Windows 98 under more specific names, such as Windows 98 Plus Pack. Flaws listed only under those names are counted on their own pages, not here. If you run one of these, open its page for its own exploited flaws.

Known exploited

Which Windows 98 vulnerabilities are being exploited?

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

None of Windows 98's published vulnerabilities is on the list of flaws known to be exploited today. We keep watching that list.

Exploit likelihood

Which Windows 98 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. 80%

    TCP, when using a large Window Size, makes it easier for remote attackers to guess sequence numbers and cause a denial of service (connection loss) to persistent TCP connections by repeatedly injecting a TCP RST...

    CVSS5.0Published18 Aug 2004
  2. 80%

    Multiple TCP/IP and ICMP implementations allow remote attackers to cause a denial of service (reset TCP connections) via spoofed ICMP error messages, aka the "blind connection-reset attack." NOTE: CVE-2004-0790,...

    CVSS5.0Published12 Apr 2005
  3. 75%

    File and Print Sharing service in Windows 95, Windows 98, and Windows Me does not properly check the password for a file share, which allows remote attackers to bypass share access controls by sending a 1-byte...

    CVSS6.4Published19 Dec 2000
  4. 75%

    Network Dynamic Data Exchange (NetDDE) services for Microsoft Windows 98, Windows NT 4.0, Windows 2000, Windows XP, and Windows Server 2003 allows attackers to remotely execute arbitrary code or locally gain...

    CVSS7.5Published3 Nov 2004
  5. 73%

    Buffer overflow in the Message Queuing component of Microsoft Windows 2000 and Windows XP SP1 allows remote attackers to execute arbitrary code via a crafted message.

    CVSS10.0Published2 May 2005
  6. 60%

    Internet Explorer 5.01, 5.5, and 6 allows remote attackers to execute arbitrary code via drag and drop events, aka the "Drag-and-Drop Vulnerability."

    CVSS7.5Published2 May 2005
  7. 59%

    The Windows Animated Cursor (ANI) capability in Windows NT, Windows 2000 through SP4, Windows XP through SP1, and Windows 2003 allow remote attackers to cause a denial of service via (1) the frame number set to zero,...

    CVSS5.0Published23 Dec 2004
Precursor Intelligence

Running Windows 98? 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.

  1. Tell us what you runPick your software from a list, or let us work it out from your website.
  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 101 published vulnerabilities listed under the name Windows 98, across 1 version.

None of Windows 98's vulnerabilities is on the list of flaws known to be exploited today.

Microsoft also lists Windows 98 under more specific names, such as Windows 98 Plus Pack. Flaws listed only under those names are counted on their own pages, not here. Open the release you run to see its own list.

Create a Precursor Intelligence account and track Windows 98. 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.