How severe is CVE-2018-4923?

CVE-2018-4923 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2018-4923 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-4923?

CVE-2018-4923 affects Adobe Connect. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-4923?

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-2018-4923 published?

CVE-2018-4923 was published on 2018-05-19 and last updated on 2026-06-17.

CVE-2018-4923

CVE-2018-4923 is a critical-severity vulnerability in Adobe Connect with a CVSS 3.x base score of 9.1. 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 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 10% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Adobe Connect
Published: 2018-05-19
Last modified: 2026-06-17

Description

Adobe Connect versions 9.7 and earlier have an exploitable OS Command Injection. Successful exploitation could lead to arbitrary file deletion.

Frequently asked questions

What is CVE-2018-4923?: Adobe Connect versions 9.7 and earlier have an exploitable OS Command Injection. Successful exploitation could lead to arbitrary file deletion.
How severe is CVE-2018-4923?: CVE-2018-4923 has a CVSS 3.x base score of 9.1, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2018-4923 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 10% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-4923?: CVE-2018-4923 affects Adobe Connect. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-4923?: 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-2018-4923 published?: CVE-2018-4923 was published on 2018-05-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:adobe:connect:*:*:*:*:*:*:*:*

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