How severe is CVE-2023-49899?

CVE-2023-49899 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-49899 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2023-49899?

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-2023-49899 published?

CVE-2023-49899 was published on 2026-07-16 and last updated on 2026-07-18.

CVE-2023-49899

CVE-2023-49899 is a critical-severity vulnerability with a CVSS 3.x base score of 9.8. 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-346.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-346
Published: 2026-07-16
Last modified: 2026-07-18

Description

An unauthenticated remote attacker can execute any command on the affected device due to not correctly verifying the origin of a communication channel.

Frequently asked questions

What is CVE-2023-49899?: An unauthenticated remote attacker can execute any command on the affected device due to not correctly verifying the origin of a communication channel.
How severe is CVE-2023-49899?: CVE-2023-49899 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2023-49899 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2023-49899?: 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-2023-49899 published?: CVE-2023-49899 was published on 2026-07-16 and last updated on 2026-07-18.

References

https://claroty.com/team82/disclosure-dashboard/cve-2023-49899

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