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CVE-2018-18651

20
FAUCET Score

CVE-2018-18651 is a denial-of-service vulnerability affecting Xpdf versions 4.00 and earlier, specifically within the AcroForm.cc component. An attacker can trigger a hang by providing a specially crafted PDF file containing a large number in the /Count field, leading to an infinite loop. This vulnerability has a medium severity CVSS score of 5.5, requiring user interaction and local access for exploitation, and its primary impact is system availability. There is currently no known active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
4.00CPE matchmatch criteria
cpe:2.3:a:xpdfreader:xpdf:4.00:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

5.5MEDIUM

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
0.92%
Probability of exploitation in next 30 days
EPSS Percentile
56.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0092 is in the 66th percentile among its peer group of 5,760 CVEs.

Social Chatter

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

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

forum.xpdfreader.com / viewtopic.php
ExploitThird Party Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/152005
Third Party Advisory