CVE-2000-0711Communicator Vulnerability
Netscape Communicator does not properly prevent a ServerSocket object from being created by untrusted entities, which allows remote attackers to create a server on the victim's system via a malicious applet, as demonstrated by Brown Orifice.
Published Oct 20, 2000 · Updated Apr 15, 2026
Key Facts
Patch immediately- CVE-2000-0711 is a high-severity vulnerability (CVSS 7.5 v2) affecting Virtual Machine (Microsoft), Communicator (Netscape).
- It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
- EPSS estimates a 34% 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 public exploit code exists for a high-severity flaw.
Scores
CVSS v2
7.5
AV:N/AC:L/Au:N/C:P/I:P/A:P
EPSS (30-day exploit likelihood)
34%
Higher than 98.3% of all scored CVEs
Exploit maturity
Proof of concept
ATLAS score
34/100
Publication score, see How it works
Exploitation Verdict
KEV listed
Not listed
Federal due date
None
No federal due date
Ransomware use
Not reported
Attributed actors
None named
Exploit & Defence Guidance
Exploit maturity
Proof of concept
Public exploit code
1
Proof-of-concept links
In-the-wild evidence
0
Reports of active use
Advisories And Exploit References
- patchCA-2000-15
- patch1545
Description
Netscape Communicator does not properly prevent a ServerSocket object from being created by untrusted entities, which allows remote attackers to create a server on the victim's system via a malicious applet, as demonstrated by Brown Orifice.
Affected Products
18 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Virtual MachineMicrosoft | 2000, 3100, 3200, 3300 | n/a |
| CommunicatorNetscape | 4.0, 4.04, 4.05, 4.06, 4.07, 4.08, 4.5, 4.51 | n/a |
Timeline
Publicly disclosed
Oct 20, 2000
Last updated
Apr 15, 2026
FAQ
Common Questions.
Netscape Communicator does not properly prevent a ServerSocket object from being created by untrusted entities, which allows remote attackers to create a server on the victim's system via a malicious applet, as demonstrated by Brown Orifice.
Affected: Virtual Machine (Microsoft) versions 2000, 3100, 3200, 3300; Communicator (Netscape) versions 4.0, 4.04, 4.05, 4.06, 4.07, 4.08, 4.5, 4.51. 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 public exploit code exists for a high-severity flaw.
Is CVE-2000-0711 On Your Attack Surface?
Brandefense matches it against the products discovered on your perimeter and opens a finding the day a CVE like this is listed.
Request A Demo