CVE-2026-3776: The application does not validate the presence of required appearance (AP) data before accessing stamp annotat

Q: How do I fix CVE-2026-3776?

pdf editor: upgrade to newer than 2025.3.0.69570; pdf reader: upgrade to newer than 2025.3.0.69570. Exact commands for each OS are on this page.

Q: Is CVE-2026-3776 being exploited?

CVE-2026-3776 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-2026-3776 affect?

CVE-2026-3776 affects pdf editor, pdf reader. Severity is medium (CVSS 5.5). The application does not validate the presence of required appearance (AP) data before accessing stamp annotation resources. When a PDF contains a stamp annotation missing its AP entry, the code continues to dereference the associated objec

Q: How urgent is CVE-2026-3776?

Priority 19/100. No elevated risk signals yet.

Routine

MEDIUM 5.5UPGRADEUPGRADE

CVE-2026-3776 is a medium-severity flaw (CVSS 5.5) affecting pdf editor, pdf reader. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The application does not validate the presence of required appearance (AP) data before accessing stamp annotation resources. When a PDF contains a stamp annotation missing its AP entry, the code continues to dereference the associated object without a prior null or validity check, which allows a crafted document to trigger a null pointer dereference and crash the application, resulting in denial of service.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-476
Published	2026-04-01
Last modified	2026-06-17

Publisher (CNA): Foxit · Vendor: foxit

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

Am I affected?

Timeline

2026-04-01 02:16 UTCPublished CVE record published
2026-06-17 10:44 UTCUpdated Record last modified

foxit pdf editor UPGRADE

Affected: <= 13.2.2.24014 · >= 14.0.0.33046 and <= 14.0.2.33402 · >= 2023.1.0.15510 and <= 2023.3.0.23028 · >= 2024.1.0.23997 and <= 2024.4.1.27687 · >= 2025.1.0.27937 and <= 2025.3.0.35737 · <= 13.2.2.63349 · >= 14.0.0.68868 and <= 14.0.2.69164 · >= 2023.1.0.55583 and <= 2023.3.0.63083

Fixed in: newer than 2025.3.0.69570

Safe to downgrade to: a release before 14.0.0.33046

1. Check installed version

apt-cache policy pdf-editor || rpm -q pdf-editor || pdf-editor --version

2. UPGRADE to newer than 2025.3.0.69570 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pdf-editor

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pdf-editor

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 14.0.0.33046 (Debian / Ubuntu)

apt-cache madison pdf-editor sudo apt install pdf-editor=<VERSION_BEFORE_14.0.0.33046> sudo apt-mark hold pdf-editor

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list pdf-editor sudo dnf downgrade pdf-editor-<VERSION_BEFORE_14.0.0.33046> sudo dnf versionlock add pdf-editor

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.

foxit pdf reader UPGRADE

Affected: <= 2025.3.0.35737 · <= 2025.3.0.69570

Fixed in: newer than 2025.3.0.69570

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy pdf-reader || rpm -q pdf-reader || pdf-reader --version

2. UPGRADE to newer than 2025.3.0.69570 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade pdf-reader

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade pdf-reader

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-2026-3776?

pdf editor: upgrade to newer than 2025.3.0.69570; pdf reader: upgrade to newer than 2025.3.0.69570. Exact commands for each OS are on this page.

Is CVE-2026-3776 being exploited?

CVE-2026-3776 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-2026-3776 affect?

CVE-2026-3776 affects pdf editor, pdf reader. Severity is medium (CVSS 5.5). The application does not validate the presence of required appearance (AP) data before accessing stamp annotation resources. When a PDF contains a stamp annotation missing its AP entry, the code continues to dereference the associated objec

How urgent is CVE-2026-3776?

Priority 19/100. No elevated risk signals yet.

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References

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