CVE-2007-5393: Heap-based buffer overflow in the CCITTFaxStream::lookChar method in xpdf/Stream.cc in Xpdf 3.02p11 allows rem

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HIGH 9.3DOWNGRADE

CVE-2007-5393 is a high-severity flaw (CVSS 9.3) affecting xpdf. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Heap-based buffer overflow in the CCITTFaxStream::lookChar method in xpdf/Stream.cc in Xpdf 3.02p11 allows remote attackers to execute arbitrary code via a PDF file that contains a crafted CCITTFaxDecode filter.

Why this priority

Critical severity
EPSS top 6%: very likely to be exploited

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.3 (High)
EPSS exploit chance	6.4% (top 6%)
CISA exploited list	No
Weakness	CWE-119
Published	2007-11-08
Last modified	2026-06-16

Publisher (CNA): Flexera Software LLC · Vendor: xpdf

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2007-11-08 02:46 UTCPublished CVE record published
2026-06-16 22:46 UTCUpdated Record last modified

xpdf xpdf DOWNGRADE

Affected: 3.02p11

Fixed in: no fixed release known

Safe to downgrade to: a release before 3.02p11

1. Check installed version

apt-cache policy xpdf || rpm -q xpdf || xpdf --version

2. No fixed release: DOWNGRADE to a release before 3.02p11 (Debian / Ubuntu)

apt-cache madison xpdf sudo apt install xpdf=<VERSION_BEFORE_3.02p11> sudo apt-mark hold xpdf

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list xpdf sudo dnf downgrade xpdf-<VERSION_BEFORE_3.02p11> sudo dnf versionlock add xpdf

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2007-5393?

xpdf: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2007-5393 being exploited?

CVE-2007-5393 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2007-5393 affect?

CVE-2007-5393 affects xpdf. Severity is high (CVSS 9.3). Heap-based buffer overflow in the CCITTFaxStream::lookChar method in xpdf/Stream.cc in Xpdf 3.02p11 allows remote attackers to execute arbitrary code via a PDF file that contains a crafted CCITTFaxDecode filter.

How urgent is CVE-2007-5393?

Priority 56/100. Critical severity; EPSS top 6%: very likely to be exploited

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References

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