CVE-2000-0406: Netscape Communicator before version 4.73 and Navigator 4.07 do not properly validate SSL certificates, which allows remote attackers to…
Noroxi assessment
Priority: Monitor (action score 10/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 1% (FIRST EPSS); higher than 64.1% of all records.
- Special conditions such as timing or configuration are required.
- According to the record, no fixed version is available yet.
Low priority for now. Update when a fix is released; follow the vendor's advisory.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
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.
- Published
- May 10, 2000
- Updated
- Jun 16, 2026
- EPSS
- 1.0% · 64th percentile
- CWE
- —
Report tools
Action score
10
Low priority for now.
- CVSS
- 10 / 40 · 2.6 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.0%
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- No fixed version yet
If any of these changes, we'll tell you in the daily email digest.
Is your version affected? Check itNoroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| netscape | communicator | cpe:2.3:a:netscape:communicator |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- netscape communicator4.0
- netscape communicator4.05
- netscape communicator4.06
- netscape communicator4.07
- netscape communicator4.5
- netscape communicator4.5_beta
- netscape communicator4.51
- netscape communicator4.6
+3 more rows
- netscape communicator4.61
- netscape communicator4.7
- netscape communicator4.72
Same product
netscape: all recordsOther highest-scoring records for the same primary product.
- CVE-2002-2248Buffer overflow in the sun.awt.windows.WDefaultFontCharset Java class implementation in Netscape 4.0 allows remote attackers to execute…42Plan
- CVE-2000-0711Netscape Communicator does not properly prevent a ServerSocket object from being created by untrusted entities, which allows remote…40Plan
- CVE-2001-0596Netscape Communicator before 4.77 allows remote attackers to execute arbitrary Javascript via a GIF image whose comment contains the…33Monitor
Published before and after this one in the same product
- ← EarlierCVE-2000-0087Jan 12, 2000 · Netscape Mail Notification (nsnotify) utility in Netscape Communicator uses IMAP without SSL, even if the user has set a preference for…20Monitor
- ← EarlierCVE-1999-0790Apr 1, 2000 · A remote attacker can read information from a Netscape user's cache via JavaScript.10Monitor
- Later →CVE-2000-0409May 10, 2000 · Netscape 4.73 and earlier follows symlinks when it imports a new certificate, which allows local users to overwrite files of the user…14Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.
Technical details
Attack conditions
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- P · data can be read
- Integrity
- none
- Availability
- none
- Attack complexity
- High
- Confidentiality impact
- P
- Integrity impact
- None
- Availability impact
- None
Weakness class (CWE)
—
CVSS vector
AV:N/AC:H/Au:N/C:P/I:N/A:N
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log (0)
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Show all references (3 more)Show less
Vendor advisories and official records. Exploit/PoC links are deliberately left out.