What is CVE-1999-1105?A medium-severity flaw in Windows 95, explained.
CVE-1999-1105 is a medium-severity flaw (CVSS 5.0) in Windows 95 from Microsoft, published on 31 December 1999. It is not on the list of flaws known to be exploited today. The latest forecast puts its chance of use in the next 30 days at 22%. If you run an affected version, plan in the vendor’s fix.
Published 31 December 1999. Record last updated 16 June 2026. We keep this page's data up to date.
What is CVE-1999-1105? In plain terms.
It can be attacked from anywhere on the internet without logging in. If it works, the attacker can read some data.
Windows 95, when Remote Administration and File Sharing for NetWare Networks is enabled, creates a share (C$) when an administrator logs in remotely, which allows remote attackers to read arbitrary files by mapping the network drive.
What kind of flaw is it?
- UnknownUnknown
How an attack on it works
Read straight from its severity rating, translated out of the shorthand.
- Where an attacker can beAnywhere on the internet
- How hard it is to pull offEasy: no special conditions
- Login needed firstNo login needed
- What an attacker getsCan read some data
Severity vector: AV:N/AC:L/Au:N/C:P/I:N/A:N
Is CVE-1999-1105 being exploited? Not that we know of.
It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 22%. That can change at any time, which is why we keep watching.
Timeline
- Published
- Exploit likelihood fell
- Exploit likelihood jumped
- Record last updated
CVE-1999-1105 scores 28. Action: Monitor.
We keep the score of every published flaw up to date as the evidence changes. Four things go into the score, and evidence that criminals are actually using it counts most. In order:
- Evidence it is being exploitedBiggest factor
- How severe it isStrong factor
- How widely exposed it isSmaller factor
- Threat activity around itSmaller factor
85 and above is Critical. Anything confirmed as exploited is always marked for an emergency patch, whatever its score.
When CVE-1999-1105 matches software you track, it lands in your list with its score and the reasons behind it.
See your own ranked list →Who is affected by CVE-1999-1105? One product.
The published record lists 1 product from 1 vendor. If you run one of these, check your version, then go to the fix below.
- Operating system
Windows 95
by Microsoft
Affected versionsall versions
How do I fix CVE-1999-1105? Four steps.
- Check whether you run itCompare your versions with the affected products above. Not sure what you run? Precursor Intelligence can work it out from your public website, or you can pick it from a list.
- Apply the vendor’s fixInstall the update named in the vendor’s advisory. We’ve put the advisories and patch notes first in the list.
- If you can’t patch todayFollow any mitigation the vendor publishes, and limit who can reach the affected system from the internet until the update is in.
- Keep an eye on itTrack the product and we tell you as soon as we spot this flaw on the list of exploited flaws, or a jump in its exploit likelihood.
Does CVE-1999-1105 affect you? 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.
- Tell us what you runPick your software from a list, or let us work it out from your website.
- We match it to every flawOver 400,000 published flaws, checked against your list.
- Ranked by real-world riskA 0 to 100 score, led by evidence criminals are using it.
- Told as soon as we knowAn alert by email, in the app or by webhook to your own tools.
Free plan, no card needed. Nothing to install.
1 new flaw affects software Acme tracks
Windows 95, when Remote Administration and File Sharing for NetWare Networks is enabled, creates a share (C$) when an administrator logs in remotely, which a...
- Matched to
- Windows 95 on Acme's software list
- What to do
- Plan in the vendor’s update
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
CVE-1999-1105 is a medium-severity flaw in Windows 95 from Microsoft, published on 31 December 1999. It can be attacked from anywhere on the internet without logging in. If it works, the attacker can read some data.
It scores 5.0 out of 10 on the CVSS severity scale, which is medium. Our risk score for CVE-1999-1105 is 28 out of 100, which is Low. Its action is "Monitor". Not confirmed as exploited yet, but serious or likely enough that it should not wait for a quiet month.
It is not on the list of flaws known to be exploited today. The latest forecast puts the chance of it being used in the next 30 days at 22%. That can change at any time, which is why we keep watching.
For Windows 95 from Microsoft: all versions.
Install the update the vendor names in its advisory, linked first under "How do I fix" on this page. If you can't patch today, follow the vendor's mitigation and limit who can reach the affected system from the internet.