CVE-2026-1996: Certain HP OfficeJet Pro printers may be vulnerable to potential denial of service when the IPP requests are m

Q: How do I fix CVE-2026-1996?

d9l18a firmware: upgrade to 001.2602a; m9l66a firmware: upgrade to 001.2602a; m9l67a firmware: upgrade to 001.2602a. Exact commands for each OS are on this page.

Q: Is CVE-2026-1996 being exploited?

CVE-2026-1996 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-2026-1996 affect?

CVE-2026-1996 affects d9l18a firmware, m9l66a firmware, m9l67a firmware. Severity is medium (CVSS 5.3). Certain HP OfficeJet Pro printers may be vulnerable to potential denial of service when the IPP requests are mishandled, failing to establish a TCP connection.

Q: How urgent is CVE-2026-1996?

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

Routine

MEDIUM 5.3REMOTEUPGRADEUPGRADEUPGRADE

CVE-2026-1996 is a medium-severity flaw (CVSS 5.3) affecting d9l18a firmware, m9l66a firmware, m9l67a firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Certain HP OfficeJet Pro printers may be vulnerable to potential denial of service when the IPP requests are mishandled, failing to establish a TCP connection.

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 76%)
CISA exploited list	No
Weakness	CWE-703
Published	2026-02-10
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

2026-02-10 18:16 UTCPublished CVE record published
2026-06-17 10:16 UTCUpdated Record last modified

hp d9l18a firmware UPGRADE

Affected: < 001.2602a

Fixed in: 001.2602a

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 m9l66a firmware UPGRADE

Affected: < 001.2602a

Fixed in: 001.2602a

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 m9l67a firmware UPGRADE

Affected: < 001.2602a

Fixed in: 001.2602a

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 t0g46a firmware UPGRADE

Affected: < 001.2602a

Fixed in: 001.2602a

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 j6x76a firmware UPGRADE

Affected: < 001.2602a

Fixed in: 001.2602a

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 j6x78a firmware UPGRADE

Affected: < 001.2602a

Fixed in: 001.2602a

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-2026-1996?

d9l18a firmware: upgrade to 001.2602a; m9l66a firmware: upgrade to 001.2602a; m9l67a firmware: upgrade to 001.2602a. Exact commands for each OS are on this page.

Is CVE-2026-1996 being exploited?

CVE-2026-1996 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-2026-1996 affect?

CVE-2026-1996 affects d9l18a firmware, m9l66a firmware, m9l67a firmware. Severity is medium (CVSS 5.3). Certain HP OfficeJet Pro printers may be vulnerable to potential denial of service when the IPP requests are mishandled, failing to establish a TCP connection.

How urgent is CVE-2026-1996?

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

References

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