How severe is CVE-2026-78018?

CVE-2026-78018 has a CVSS score of 6.3/10, rated MEDIUM. Review your exposure and patch according to your risk tolerance.

Which packages are affected by CVE-2026-78018?

Affected package information for CVE-2026-78018 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2026-78018?

No fixed release is recorded for CVE-2026-78018 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.

How do I detect CVE-2026-78018 in my code and dependencies?

Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

How do I mitigate CVE-2026-78018 if there is no patch (or I can't update yet)?

Assume what was exposed is already known: rotate any credential, token or key that the affected component could return, restrict the endpoint to callers that genuinely need it, and strip sensitive fields from responses and error output at the boundary rather than relying on the client not to read them.

Is CVE-2026-78018 actively exploited in the wild?

No public exploit code has been indexed for CVE-2026-78018 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for CVE-2026-78018?

CVE-2026-78018 has an EPSS (Exploit Prediction Scoring System) score of 0.1%, placing it in the 0th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is CVE-2026-78018?

CVE-2026-78018 is classified as CWE-1188 (CWE-1188). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

When was CVE-2026-78018 published, and has it been updated?

CVE-2026-78018 was published on October 9, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

🛡️

Not in CISA KEV

MEDIUM severity

CVE-2026-78018

MEDIUM

CVE-2026-78018 is a medium-severity (CVSS 6.3) CWE-1188 vulnerability. No vendor fix is recorded yet; mitigation options are listed below.

Dell Secure Connect Gateway (SCG) Policy Manager, versions prior to 5.34.00.16, contains an Initialization of a Resource with an Insecure Default vulnerability. A low privileged attacker…

Published

Oct 9, 2026

Updated

Oct 9, 2026

Affected

—

Patched

—

Exploits

None indexed

Exploitation data as of Oct 9, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗

0.1%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs0th percentile — riskier than 0% of all scored CVEsHighest risk

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

CVE-2026-78018 by exploitation likelihood (EPSS) against impact (CVSS). Outside the shaded patch-first corner.

Where this sits among everything scored

Of 385,987 CVEs with a current EPSS score, this one falls in the < 10% band (highlighted). Counts from FIRST.org, log-scaled.

Description

Dell Secure Connect Gateway (SCG) Policy Manager, versions prior to 5.34.00.16, contains an Initialization of a Resource with an Insecure Default vulnerability. A low privileged attacker with local access could potentially exploit this vulnerability, leading to Information disclosure.

Detection & mitigation playbook

Vulnerability

Detect
Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).
Remediation status
No fixed release is recorded for CVE-2026-78018 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.
Mitigate without a patch
Assume what was exposed is already known: rotate any credential, token or key that the affected component could return, restrict the endpoint to callers that genuinely need it, and strip sensitive fields from responses and error output at the boundary rather than relying on the client not to read them.

Frequently Asked Questions

O3 Security · Impact-Aware SCA

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