CVE-2021-42128
CVE-2021-42128 is a critical-severity vulnerability in Ivanti Avalanche 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-749.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 4% (90th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-749
- Affected product: Ivanti Avalanche
- Published:
- Last modified:
Description
An exposed dangerous function vulnerability exists in Ivanti Avalanche before 6.3.3 using inforail Service allows Privilege Escalation via Enterprise Server Service.
Frequently asked questions
- What is CVE-2021-42128?
- An exposed dangerous function vulnerability exists in Ivanti Avalanche before 6.3.3 using inforail Service allows Privilege Escalation via Enterprise Server Service.
- How severe is CVE-2021-42128?
- CVE-2021-42128 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-2021-42128 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (90th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-42128?
- CVE-2021-42128 affects Ivanti Avalanche. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-42128?
- 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-2021-42128 published?
- CVE-2021-42128 was published on 2021-12-07 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:ivanti:avalanche:*:*:*:*:*:*:*:*
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