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CVE-2018-6462: Tracker PDF-XChange Viewer and Viewer AX SDK before 2.5.322.8 mishandle conversion from YCC to RGB colour spac

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HIGH 7.8UPGRADEUPGRADE

CVE-2018-6462 is a high-severity flaw (CVSS 7.8) affecting pdf-xchange viewer, viewer ax sdk. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Tracker PDF-XChange Viewer and Viewer AX SDK before 2.5.322.8 mishandle conversion from YCC to RGB colour spaces by calculating on the basis of 1 bpc instead of 8 bpc, which might allow remote attackers to execute arbitrary code via a crafted PDF document.

Why this priority

  • High severity

A fixed release or distro patch exists.

Risk facts

CVSS score7.8 (High)
Attack vectorLocal
Attack complexityLow
Privileges neededNone
User interactionRequired
EPSS exploit chance2.5% (top 16%)
CISA exploited listNo
WeaknessCWE-787
Published2018-01-31
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: tracker-software

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Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

tracker-software pdf-xchange viewer UPGRADE
Affected: < 2.5.322.8
Fixed in: 2.5.322.8
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy pdf-xchange-viewer || rpm -q pdf-xchange-viewer || pdf-xchange-viewer --version
2. UPGRADE to 2.5.322.8 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade pdf-xchange-viewer
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade pdf-xchange-viewer
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
tracker-software viewer ax sdk UPGRADE
Affected: < 2.5.322.8
Fixed in: 2.5.322.8
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy viewer-ax-sdk || rpm -q viewer-ax-sdk || viewer-ax-sdk --version
2. UPGRADE to 2.5.322.8 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade viewer-ax-sdk
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade viewer-ax-sdk
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
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-2018-6462?

pdf-xchange viewer: upgrade to 2.5.322.8; viewer ax sdk: upgrade to 2.5.322.8. Exact commands for each OS are on this page.

Is CVE-2018-6462 being exploited?

CVE-2018-6462 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-2018-6462 affect?

CVE-2018-6462 affects pdf-xchange viewer, viewer ax sdk. Severity is high (CVSS 7.8). Tracker PDF-XChange Viewer and Viewer AX SDK before 2.5.322.8 mishandle conversion from YCC to RGB colour spaces by calculating on the basis of 1 bpc instead of 8 bpc, which might allow remote attackers to execute arbitrary code via a craft

How urgent is CVE-2018-6462?

Priority 48/100. High severity

Related CVEs

References

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