How severe is CVE-2026-66372?

CVE-2026-66372 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-66372 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-66372?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2026-66372 published?

CVE-2026-66372 was published on 2026-09-15 and last updated on 2026-09-18.

CVE-2026-66372

CVE-2026-66372 is a medium-severity vulnerability with a CVSS 3.x base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-337.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
CVSS v4: 7.6
EPSS exploit prediction: 0% (18th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-337
Published: 2026-09-15
Last modified: 2026-09-18

Description

The affected products use insufficiently random values, which allows web session tokens to be predictable, bounding token entropy to the seed space.

Frequently asked questions

What is CVE-2026-66372?: The affected products use insufficiently random values, which allows web session tokens to be predictable, bounding token entropy to the seed space.
How severe is CVE-2026-66372?: CVE-2026-66372 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-66372 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (18th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-66372?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-66372 published?: CVE-2026-66372 was published on 2026-09-15 and last updated on 2026-09-18.

References

Other CWE-337 vulnerabilities

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