CVE-2025-66769: A NULL pointer dereference in Nitro PDF Pro for Windows v14.41.1.4 allows attackers to cause a Denial of Servi

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HIGH 7.5REMOTEDOWNGRADE

CVE-2025-66769 is a high-severity flaw (CVSS 7.5) affecting nitro pdf pro. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A NULL pointer dereference in Nitro PDF Pro for Windows v14.41.1.4 allows attackers to cause a Denial of Service (DoS) via a crafted XFA packet.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 63%)
CISA exploited list	No
Weakness	CWE-476
Published	2026-04-13
Last modified	2026-10-23

Publisher (CNA): MITRE · Vendor: gonitro

Am I affected?

Timeline

2026-04-13 16:16 UTCPublished CVE record published
2026-10-23 22:10 UTCUpdated Record last modified

gonitro nitro pdf pro DOWNGRADE

Affected: 14.41.1.4

Fixed in: no fixed release known

Safe to downgrade to: a release before 14.41.1.4

1. Check installed version

apt-cache policy nitro-pdf-pro || rpm -q nitro-pdf-pro || nitro-pdf-pro --version

2. No fixed release: DOWNGRADE to a release before 14.41.1.4 (Debian / Ubuntu)

apt-cache madison nitro-pdf-pro sudo apt install nitro-pdf-pro=<VERSION_BEFORE_14.41.1.4> sudo apt-mark hold nitro-pdf-pro

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

dnf --showduplicates list nitro-pdf-pro sudo dnf downgrade nitro-pdf-pro-<VERSION_BEFORE_14.41.1.4> sudo dnf versionlock add nitro-pdf-pro

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.

Exact fixes by distribution

A distro patch exists: prefer upgrading over downgrading.

Fedora 46 · kwin-zones · FIXED · 1.0.13-1.fc46 · FEDORA-2026-95888f332b · source

sudo dnf upgrade --advisory=FEDORA-2026-95888f332b

Fedora ELN · nginx-mod-brotli · FIXED · 1.0.0~rc-16.eln159 · FEDORA-2026-501a6a8273 · source

sudo dnf upgrade --advisory=FEDORA-2026-501a6a8273

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-2025-66769?

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

Is CVE-2025-66769 being exploited?

CVE-2025-66769 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-2025-66769 affect?

CVE-2025-66769 affects nitro pdf pro. Severity is high (CVSS 7.5). A NULL pointer dereference in Nitro PDF Pro for Windows v14.41.1.4 allows attackers to cause a Denial of Service (DoS) via a crafted XFA packet.

How urgent is CVE-2025-66769?

Priority 41/100. High severity; Remotely exploitable, no login, no user action

References

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