CVE-2004-2621 json
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 afte…
published 2004-12-31 21 y ago modified 2026-06-16 4 mo ago also EUVD-2004-2612
- cvss
- 4.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.7%
- EPSS 0.7% chance of exploitation in 30 days, percentile 55%
- public exploits
- 0
- none known
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.
Exploit prediction
0.75% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 4.0 | AV:N/AC:H/Au:N/C:P/I:P/A:N |
References
-
secunia.com
/advisories/12881
third-party-advisory, vendor-advisory
- www130.nortelnetworks.com /cgi-bin/eserv/cs/main.jsp?level=6&category=8&subcategory=6&subtype=&DocumentOID=276620&RenditionID=REND159588
-
exchange.xforce.ibmcloud.com
/vulnerabilities/17812
vdb-entry
-
securityfocus.com
/bid/11495
vdb-entry
-
osvdb.org
/11002
vdb-entry
-
securitytracker.com
/id?1011846
vdb-entry
Sources
- CVE List CVE-2004-2621
- NVD CVE-2004-2621
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.