CVE-2018-18651

Name: CVE-2018-18651
Creator: NVD / NIST
Published: 2018-10-25T13:29:00.347+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.92%

Last modified Jun 17, 2026

CVE-2018-18651 is a vulnerability of currently unknown severity. An issue was discovered in Xpdf 4.00. catalog->getNumPages() in AcroForm.cc allows attackers to launch a denial of service (hang caused by large loop) via a specific pdf file, as demonstrated by pdftohtml. EPSS estimates a 0.92% chance of exploitation in the next 30 days.

Description

An issue was discovered in Xpdf 4.00. catalog->getNumPages() in AcroForm.cc allows attackers to launch a denial of service (hang caused by large loop) via a specific pdf file, as demonstrated by pdftohtml. This is mainly caused by a large number after the /Count field in the file.

Metrics

EPSS Probability

0.92%

55.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-834

Affected Software

Vendor	Product	Versions
Xpdfreader	Xpdf	4.00

References

https://forum.xpdfreader.com/viewtopic.php?f=3&t=41219&p=41747#p41747Exploit, Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/152005Third Party Advisory
https://forum.xpdfreader.com/viewtopic.php?f=3&t=41219&p=41747#p41747Exploit, Third Party Advisory

Timeline

Published: Oct 25, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-18651?

How severe is CVE-2018-18651?

Severity scoring for CVE-2018-18651 is pending analysis. The EPSS model estimates a 0.92% probability of exploitation in the next 30 days.

How do I fix CVE-2018-18651?

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-2018-18651?

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

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Source: NVD / NIST