CVE-2025-26506: Certain HP LaserJet Pro, HP LaserJet Enterprise, and HP LaserJet Managed Printers may potentially be vulnerabl
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CRITICAL 9.8REMOTEUPGRADEUPGRADEUPGRADE
CVE-2025-26506 is a critical-severity flaw (CVSS 9.8) affecting 4ra85f firmware, 4ra85v firmware, 4ra86a firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
Certain HP LaserJet Pro, HP LaserJet Enterprise, and HP LaserJet Managed Printers may potentially be vulnerable to Remote Code Execution and Elevation of Privilege when processing a PostScript print job.
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
Published CVE record published
Updated Record last modified
hp 4ra85f firmware UPGRADE
Affected: < 6.17.5.34-202412122146
Fixed in: 6.17.5.34-202412122146
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
hp 4ra85v firmware UPGRADE
Affected: < 6.17.5.34-202412122146
Fixed in: 6.17.5.34-202412122146
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
hp 4ra86a firmware UPGRADE
Affected: < 6.17.5.34-202412122146
Fixed in: 6.17.5.34-202412122146
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
hp 4ra86e firmware UPGRADE
Affected: < 6.17.5.34-202412122146
Fixed in: 6.17.5.34-202412122146
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
hp 4ra86f firmware UPGRADE
Affected: < 6.17.5.34-202412122146
Fixed in: 6.17.5.34-202412122146
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
hp 4ra87a firmware UPGRADE
Affected: < 6.17.5.34-202412122146
Fixed in: 6.17.5.34-202412122146
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
Verify at the official sourceNVD · 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-2025-26506?
4ra85f firmware: upgrade to 6.17.5.34-202412122146; 4ra85v firmware: upgrade to 6.17.5.34-202412122146; 4ra86a firmware: upgrade to 6.17.5.34-202412122146. Exact commands for each OS are on this page.
Is CVE-2025-26506 being exploited?
CVE-2025-26506 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-2025-26506 affect?
CVE-2025-26506 affects 4ra85f firmware, 4ra85v firmware, 4ra86a firmware. Severity is critical (CVSS 9.8). Certain HP LaserJet Pro, HP LaserJet Enterprise, and HP LaserJet Managed Printers may potentially be vulnerable to Remote Code Execution and Elevation of Privilege when processing a PostScript print job.
How urgent is CVE-2025-26506?
Priority 56/100. Critical severity; Remotely exploitable, no login, no user action
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