How severe is CVE-2026-64878?

CVE-2026-64878 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-64878 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-64878?

CVE-2026-64878 affects Tenable Security Center. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-64878?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2026-64878 published?

CVE-2026-64878 was published on 2026-07-21 and last updated on 2026-08-18.

CVE-2026-64878

CVE-2026-64878 is a critical-severity vulnerability in Tenable Security Center with a CVSS 3.x base score of 9.9. 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.9)
CVSS v4: 9.4
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Tenable Security Center
Published: 2026-07-21
Last modified: 2026-08-18

Description

Unvalidated input in asset filter parameters allows shell metacharacters to escape command argument handling, resulting in remote code execution as a low-privileged OS user via the Analysis REST endpoint.

Frequently asked questions

What is CVE-2026-64878?: Unvalidated input in asset filter parameters allows shell metacharacters to escape command argument handling, resulting in remote code execution as a low-privileged OS user via the Analysis REST endpoint.
How severe is CVE-2026-64878?: CVE-2026-64878 has a CVSS 3.x base score of 9.9, rated critical severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-64878 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-64878?: CVE-2026-64878 affects Tenable Security Center. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-64878?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2026-64878 published?: CVE-2026-64878 was published on 2026-07-21 and last updated on 2026-08-18.

References

https://www.tenable.com/security/tns-2026-19

Affected products (1)

cpe:2.3:a:tenable:security_center:*:*:*:*:*:*:*:*

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