CVE-2025-43018: Certain HP LaserJet Pro printers may be vulnerable to information disclosure when a non-authenticated user que

Q: How do I fix CVE-2025-43018?

w1a75a firmware: upgrade to 002.2508a; w1a76a firmware: upgrade to 002.2508a; w1a77a firmware: upgrade to 002.2508a. Exact commands for each OS are on this page.

Q: Is CVE-2025-43018 being exploited?

CVE-2025-43018 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-43018 affect?

CVE-2025-43018 affects w1a75a firmware, w1a76a firmware, w1a77a firmware. Severity is medium (CVSS 5.3). Certain HP LaserJet Pro printers may be vulnerable to information disclosure when a non-authenticated user queries a device’s local address book.

Q: How urgent is CVE-2025-43018?

Priority 29/100. Remotely exploitable, no login, no user action

Routine

MEDIUM 5.3REMOTEUPGRADEUPGRADEUPGRADE

CVE-2025-43018 is a medium-severity flaw (CVSS 5.3) affecting w1a75a firmware, w1a76a firmware, w1a77a firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Certain HP LaserJet Pro printers may be vulnerable to information disclosure when a non-authenticated user queries a device’s local address book.

Why this priority

Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 77%)
CISA exploited list	No
Weakness	CWE-200
Published	2025-07-30
Last modified	2026-06-17

Publisher (CNA): HP Inc. · Vendor: hp

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

Am I affected?

Timeline

2025-07-30 15:15 UTCPublished CVE record published
2026-06-17 09:23 UTCUpdated Record last modified

hp w1a75a firmware UPGRADE

Affected: < 002.2508a

Fixed in: 002.2508a

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 w1a76a firmware UPGRADE

Affected: < 002.2508a

Fixed in: 002.2508a

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 w1a77a firmware UPGRADE

Affected: < 002.2508a

Fixed in: 002.2508a

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 w1a81a firmware UPGRADE

Affected: < 002.2508a

Fixed in: 002.2508a

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 w1a82a firmware UPGRADE

Affected: < 002.2508a

Fixed in: 002.2508a

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 w1a79a firmware UPGRADE

Affected: < 002.2508a

Fixed in: 002.2508a

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 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-2025-43018?

w1a75a firmware: upgrade to 002.2508a; w1a76a firmware: upgrade to 002.2508a; w1a77a firmware: upgrade to 002.2508a. Exact commands for each OS are on this page.

Is CVE-2025-43018 being exploited?

CVE-2025-43018 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-2025-43018 affect?

CVE-2025-43018 affects w1a75a firmware, w1a76a firmware, w1a77a firmware. Severity is medium (CVSS 5.3). Certain HP LaserJet Pro printers may be vulnerable to information disclosure when a non-authenticated user queries a device’s local address book.

How urgent is CVE-2025-43018?

Priority 29/100. Remotely exploitable, no login, no user action

References

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