CVE-2001-1183

Name: CVE-2001-1183
Creator: NVD / NIST
Published: 2001-07-12T04:00:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.75%

Last modified Jun 16, 2026

CVE-2001-1183 is a vulnerability of currently unknown severity. PPTP implementation in Cisco IOS 12.1 and 12.2 allows remote attackers to cause a denial of service (crash) via a malformed packet.. EPSS estimates a 3.75% chance of exploitation in the next 30 days.

Description

PPTP implementation in Cisco IOS 12.1 and 12.2 allows remote attackers to cause a denial of service (crash) via a malformed packet.

Metrics

EPSS Probability

3.75%

88.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Cisco	Ios	12.1e
Cisco	Ios	12.1ez
Cisco	Ios	12.1t
Cisco	Ios	12.1ya
Cisco	Ios	12.1yc
Cisco	Ios	12.1yd
Cisco	Ios	12.2
Cisco	Ios	12.2t
Cisco	Ios	12.2xa
Cisco	Ios	12.2xd
Cisco	Ios	12.2xe
Cisco	Ios	12.2xh
Cisco	Ios	12.2xq

References

http://www.cisco.com/warp/public/707/PPTP-vulnerability-pub.htmlPatch, Vendor Advisory
http://www.kb.cert.org/vuls/id/656315Patch, Third Party Advisory, US Government Resource
http://www.osvdb.org/802
http://www.securityfocus.com/bid/3022Patch, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/6835
http://www.cisco.com/warp/public/707/PPTP-vulnerability-pub.htmlPatch, Vendor Advisory
http://www.kb.cert.org/vuls/id/656315Patch, Third Party Advisory, US Government Resource
http://www.osvdb.org/802
http://www.securityfocus.com/bid/3022Patch, Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/6835

Timeline

Published: Jul 12, 2001
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2001-1183?

PPTP implementation in Cisco IOS 12.1 and 12.2 allows remote attackers to cause a denial of service (crash) via a malformed packet.

How severe is CVE-2001-1183?

Severity scoring for CVE-2001-1183 is pending analysis. The EPSS model estimates a 3.75% probability of exploitation in the next 30 days.

How do I fix CVE-2001-1183?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2001-1183?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST