CVE-2018-25217: PDF Explorer 1.5.66.2 contains a structured exception handler (SEH) overflow vulnerability that allows local a

Routine

HIGH 8.4DOWNGRADE

CVE-2018-25217 is a high-severity flaw (CVSS 8.4) affecting pdf explorer. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

PDF Explorer 1.5.66.2 contains a structured exception handler (SEH) overflow vulnerability that allows local attackers to execute arbitrary code by overwriting SEH records with malicious data. Attackers can craft a payload with buffer overflow, NSEH jump, and ROP gadget chains that execute when the Custom fields settings dialog processes the malicious input in the Label field.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	8.4 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-03-26
Last modified	2026-06-17

Publisher (CNA): VulnCheck · Vendor: rttsoftware

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

Am I affected?

Timeline

2026-03-26 14:16 UTCPublished CVE record published
2026-06-17 01:55 UTCUpdated Record last modified

rttsoftware pdf explorer DOWNGRADE

Affected: 1.5.66.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.5.66.2

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 1.5.66.2 (Debian / Ubuntu)

apt-cache madison pdf-explorer sudo apt install pdf-explorer=<VERSION_BEFORE_1.5.66.2> sudo apt-mark hold pdf-explorer

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

dnf --showduplicates list pdf-explorer sudo dnf downgrade pdf-explorer-<VERSION_BEFORE_1.5.66.2> sudo dnf versionlock add pdf-explorer

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.

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-2018-25217?

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

Is CVE-2018-25217 being exploited?

CVE-2018-25217 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-2018-25217 affect?

CVE-2018-25217 affects pdf explorer. Severity is high (CVSS 8.4). PDF Explorer 1.5.66.2 contains a structured exception handler (SEH) overflow vulnerability that allows local attackers to execute arbitrary code by overwriting SEH records with malicious data. Attackers can craft a payload with buffer overf

How urgent is CVE-2018-25217?

Priority 38/100. High severity; Public exploit reference

References

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