CVE-2001-0427 json
Cisco VPN 3000 series concentrators before 2.5.2(F) allow remote attackers to cause a denial of service via a flood of invalid login reques…
published 2001-06-18 25 y ago modified 2026-06-16 4 mo ago also EUVD-2001-0424
- cvss
- 7.1
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.5%
- EPSS 2.5% chance of exploitation in 30 days, percentile 84%
- public exploits
- 0
- none known
Summary
Cisco VPN 3000 series concentrators before 2.5.2(F) allow remote attackers to cause a denial of service via a flood of invalid login requests to (1) the SSL service, or (2) the telnet service, which do not properly disconnect the user after several failed login attempts.
Patch / fix
Exploit prediction
2.52% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 7.1 | AV:N/AC:M/Au:N/C:N/I:N/A:C |
Classification
- Weakness
-
- CWE-20 Improper Input Validation
References
-
cisco.com
/warp/public/707/vpn3k-telnet-vuln-pub.shtml
vendor-advisory, patch
-
osvdb.org
/5643
vdb-entry
-
exchange.xforce.ibmcloud.com
/vulnerabilities/6298
vdb-entry
Sources
- CVE List CVE-2001-0427
- NVD CVE-2001-0427
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.