Netscape Communicator before version 4.73 and Navigator 4.07 do not properly validate SSL…
Priority LOW 15Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · None · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Netscape Communicator before version 4.73 and Navigator 4.07 do not properly validate SSL certificates, which allows remote attackers to steal information by redirecting traffic from a legitimate web server to their own malicious server, aka the "Acros-Suencksen SSL" vulnerability.
Why it matters now
EPSS 0.01025 63rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 11
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:netscape:communicator:4.0:*:*:*:*:*:*:* | 4.0 | Vulnerable | Netscape |
| cpe:2.3:a:netscape:communicator:4.05:*:*:*:*:*:*:* | 4.05 | Vulnerable | Netscape |
| cpe:2.3:a:netscape:communicator:4.5:*:*:*:*:*:*:* | 4.5 | Vulnerable | Netscape |
| cpe:2.3:a:netscape:communicator:4.5_beta:*:*:*:*:*:*:* | 4.5_beta | Vulnerable | Netscape |
| cpe:2.3:a:netscape:communicator:4.06:*:*:*:*:*:*:* | 4.06 | Vulnerable | Netscape |
| cpe:2.3:a:netscape:communicator:4.6:*:*:*:*:*:*:* | 4.6 | Vulnerable | Netscape |
| cpe:2.3:a:netscape:communicator:4.07:*:*:*:*:*:*:* | 4.07 | Vulnerable | Netscape |
| cpe:2.3:a:netscape:communicator:4.7:*:*:*:*:*:*:* | 4.7 | Vulnerable | Netscape |
| cpe:2.3:a:netscape:communicator:4.51:*:*:*:*:*:*:* | 4.51 | Vulnerable | Netscape |
| cpe:2.3:a:netscape:communicator:4.61:*:*:*:*:*:*:* | 4.61 | Vulnerable | Netscape |
- cpe:2.3:a:netscape:communicator:4.0:*:*:*:*:*:*:* Versions 4.0 Vulnerable ·Netscape
- cpe:2.3:a:netscape:communicator:4.05:*:*:*:*:*:*:* Versions 4.05 Vulnerable ·Netscape
- cpe:2.3:a:netscape:communicator:4.5:*:*:*:*:*:*:* Versions 4.5 Vulnerable ·Netscape
- cpe:2.3:a:netscape:communicator:4.5_beta:*:*:*:*:*:*:* Versions 4.5_beta Vulnerable ·Netscape
- cpe:2.3:a:netscape:communicator:4.06:*:*:*:*:*:*:* Versions 4.06 Vulnerable ·Netscape
- cpe:2.3:a:netscape:communicator:4.6:*:*:*:*:*:*:* Versions 4.6 Vulnerable ·Netscape
- cpe:2.3:a:netscape:communicator:4.07:*:*:*:*:*:*:* Versions 4.07 Vulnerable ·Netscape
- cpe:2.3:a:netscape:communicator:4.7:*:*:*:*:*:*:* Versions 4.7 Vulnerable ·Netscape
- cpe:2.3:a:netscape:communicator:4.51:*:*:*:*:*:*:* Versions 4.51 Vulnerable ·Netscape
- cpe:2.3:a:netscape:communicator:4.61:*:*:*:*:*:*:* Versions 4.61 Vulnerable ·Netscape
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2000-0406
- 2026-10-03 Alias added: GHSA-4x6c-6ppx-5vjq
References
More Netscape Communicator vulnerabilities
- TI-2000-00709 Netscape Communicator does not properly prevent a ServerSocket object from being created… CVSS 2.0HIGH 7.5
- TI-2002-02160 Buffer overflow in the sun.awt.windows.WDefaultFontCharset Java class implementation in… CVSS 2.0HIGH 10.0
- TI-2001-00581 Netscape Communicator before 4.77 allows remote attackers to execute arbitrary Javascript… CVSS 2.0HIGH 7.5
- TI-2000-00674 Netscape Communicator and Navigator 4.04 through 4.74 allows remote attackers to read… CVSS 2.0MEDIUM 5.0
- TI-1999-00528 A configuration in a web browser such as Internet Explorer or Netscape Navigator allows… CVSS 2.0HIGH 7.5
- TI-2002-00577 Buffer overflow in Netscape 6 and Mozilla 1.0 RC1 and earlier allows remote attackers to… CVSS 2.0HIGH 7.5
Sources
- CVE-2000-0406 · CVE Program
- CVE-2000-0406 · NVD
- FIRST EPSS
- GHSA-4x6c-6ppx-5vjq · GitHub Advisory Database · CC BY 4.0
- CVE-2000-0406 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences