CVE-2001-1183 json
PPTP implementation in Cisco IOS 12.1 and 12.2 allows remote attackers to cause a denial of service (crash) via a malformed packet.
published 2001-07-12 25 y ago modified 2026-06-16 4 mo ago also EUVD-2001-1164
- cvss
- 5.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.8%
- EPSS 3.8% chance of exploitation in 30 days, percentile 90%
- public exploits
- 0
- none known
Summary
PPTP implementation in Cisco IOS 12.1 and 12.2 allows remote attackers to cause a denial of service (crash) via a malformed packet.
Patch / fix
- cisco.com/warp/public/707/PPTP-vulnerability-pub.html advisory
- kb.cert.org/vuls/id/656315 advisory
- securityfocus.com/bid/3022 advisory
Exploit prediction
3.82% chance of exploitation in the next 30 days, higher than 90% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
Classification
- Technology feeds
References
-
cisco.com
/warp/public/707/PPTP-vulnerability-pub.html
vendor-advisory, patch
-
kb.cert.org
/vuls/id/656315
third-party-advisory, patch, us-government-resource
-
securityfocus.com
/bid/3022
vdb-entry, patch, vendor-advisory
-
osvdb.org
/802
vdb-entry
-
exchange.xforce.ibmcloud.com
/vulnerabilities/6835
vdb-entry
Sources
- CVE List CVE-2001-1183
- NVD CVE-2001-1183
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.