What is CVE-2021-27548?

CVE-2021-27548 is a medium-severity vulnerability in Xpdfreader Xpdf, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2022-05-18.

How severe is CVE-2021-27548?

Medium severity. CVSS v3 base score is 5.5 out of 10.

NULL pointer dereference in Xpdfreader Xpdf

CVE-2021-27548

There is a Null Pointer Dereference vulnerability in the XFAScanner::scanNode() function in XFAScanner.cc in xpdf 4.03.

Published 2022-05-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (52.9th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: -0.000

Affected products

Xpdfreader Xpdf — versions 4.03

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

forum.xpdfreader.com/viewtopic.php (Exploit, Vendor Advisory)

Frequently asked questions

What is CVE-2021-27548?: CVE-2021-27548 is a medium-severity vulnerability in Xpdfreader Xpdf, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2022-05-18.
How severe is CVE-2021-27548?: Medium severity. CVSS v3 base score is 5.5 out of 10.