Nortel Contivity VPN Client 2.1.7, 3.00, 3.01, 4.91, and 5.01, when opening a VPN tunnel…
Priority LOW 20Published · 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 · Partial · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
Nortel Contivity VPN Client 2.1.7, 3.00, 3.01, 4.91, and 5.01, when opening a VPN tunnel, does not check the gateway certificate until after a dialog box has been displayed to the user, which creates a race condition that allows remote attackers to perform a man-in-the-middle (MITM) attack.
Why it matters now
EPSS 0.00746 55th 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 · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:nortel:contivity:2.1.7:*:*:*:*:*:*:* | 2.1.7 | Vulnerable | Nortel |
| cpe:2.3:h:nortel:contivity:3.00:*:*:*:*:*:*:* | 3.00 | Vulnerable | Nortel |
| cpe:2.3:h:nortel:contivity:3.01:*:*:*:*:*:*:* | 3.01 | Vulnerable | Nortel |
| cpe:2.3:h:nortel:contivity:4.91:*:*:*:*:*:*:* | 4.91 | Vulnerable | Nortel |
| cpe:2.3:h:nortel:contivity:5.01:*:*:*:*:*:*:* | 5.01 | Vulnerable | Nortel |
- cpe:2.3:h:nortel:contivity:2.1.7:*:*:*:*:*:*:* Versions 2.1.7 Vulnerable ·Nortel
- cpe:2.3:h:nortel:contivity:3.00:*:*:*:*:*:*:* Versions 3.00 Vulnerable ·Nortel
- cpe:2.3:h:nortel:contivity:3.01:*:*:*:*:*:*:* Versions 3.01 Vulnerable ·Nortel
- cpe:2.3:h:nortel:contivity:4.91:*:*:*:*:*:*:* Versions 4.91 Vulnerable ·Nortel
- cpe:2.3:h:nortel:contivity:5.01:*:*:*:*:*:*:* Versions 5.01 Vulnerable ·Nortel
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2004-2621
- 2026-10-03 Alias added: GHSA-8f69-wvhw-fqc8
References
More Nortel Contivity vulnerabilities
- TI-2007-02251 Nortel VPN Router (aka Contivity) 1000, 2000, 4000, and 5000 before 5_05.149, 5_05.3xx… CVSS 2.0HIGH 10.0
- TI-2007-02252 Nortel VPN Router (aka Contivity) 1000, 2000, 4000, and 5000 before 5_05.149, 5_05.3xx… CVSS 2.0HIGH 7.5
- TI-2005-02443 Nortel Contivity VPN Client V05_01.030, when configuring a certificate to be used as… CVSS 2.0HIGH 7.2
- TI-2004-01002 Nortel Networks Contivity VPN Client displays a different error message depending on… CVSS 2.0MEDIUM 5.0
- TI-2005-01709 Nortel VPN Router (aka Contivity) allows remote attackers to cause a denial of service… CVSS 2.0MEDIUM 5.0
- TI-2000-00063 cgiproc CGI script in Nortel Contivity HTTP server allows remote attackers to read… CVSS 2.0MEDIUM 5.0
Sources
- CVE-2004-2621 · CVE Program
- CVE-2004-2621 · NVD
- FIRST EPSS
- GHSA-8f69-wvhw-fqc8 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences