How severe is CVE-2023-46263?

CVE-2023-46263 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-2023-46263 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 82% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-46263?

CVE-2023-46263 affects Ivanti Avalanche. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-46263?

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-2023-46263 published?

CVE-2023-46263 was published on 2023-12-19 and last updated on 2026-06-17.

CVE-2023-46263

CVE-2023-46263 is a critical-severity vulnerability in Ivanti Avalanche with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 82% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
EPSS exploit prediction: 82% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Ivanti Avalanche
Published: 2023-12-19
Last modified: 2026-06-17

Description

An unrestricted upload of file with dangerous type vulnerability exists in Avalanche versions 6.4.1 and below that could allow an attacker to achieve a remote code execution.

Frequently asked questions

What is CVE-2023-46263?: An unrestricted upload of file with dangerous type vulnerability exists in Avalanche versions 6.4.1 and below that could allow an attacker to achieve a remote code execution.
How severe is CVE-2023-46263?: CVE-2023-46263 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-2023-46263 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 82% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-46263?: CVE-2023-46263 affects Ivanti Avalanche. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-46263?: 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-2023-46263 published?: CVE-2023-46263 was published on 2023-12-19 and last updated on 2026-06-17.

References

https://download.wavelink.com/Files/avalanche_v6.4.2_release_notes.txt

Affected products (1)

cpe:2.3:a:ivanti:avalanche:*:*:*:*:premise:*:*:*

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