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CVE-2001-1183

16
FAUCET Score

CVE-2001-1183 describes a denial-of-service vulnerability affecting Cisco IOS versions 12.1 and 12.2, specifically within its PPTP implementation. A remote unauthenticated attacker can exploit this by sending a malformed packet, causing the affected device to crash. Rated Medium severity with a CVSS score of 5.0, this vulnerability has a low attack complexity and only impacts availability. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
12.1eCPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.1e:*:*:*:*:*:*:*
12.1ezCPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.1ez:*:*:*:*:*:*:*
12.1tCPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.1t:*:*:*:*:*:*:*
12.1yaCPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.1ya:*:*:*:*:*:*:*
12.1ycCPE matchmatch criteria
cpe:2.3:o:cisco:ios:12.1yc:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.82%
Probability of exploitation in next 30 days
EPSS Percentile
89.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0382 is in the 85th percentile among its peer group of 23,705 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

exchange.xforce.ibmcloud.com / vulnerabilities/6835
cisco.com / warp/public/707/PPTP-vulnerability-pub.html
PatchVendor Advisory
kb.cert.org / vuls/id/656315
PatchThird Party AdvisoryUS Government Resource
osvdb.org / 802
securityfocus.com / bid/3022
PatchVendor Advisory