How severe is CVE-2020-35547?

CVE-2020-35547 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 high, integrity high, and availability none.

Is CVE-2020-35547 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35547?

CVE-2020-35547 affects Mitel Micollab. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-35547?

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-2020-35547 published?

CVE-2020-35547 was published on 2021-01-29 and last updated on 2026-06-17.

CVE-2020-35547

CVE-2020-35547 is a critical-severity vulnerability in Mitel Micollab 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.

Key facts

Severity: Critical (CVSS 3.x base score 9.1)
CVSS v2: 6.4
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Mitel Micollab
Published: 2021-01-29
Last modified: 2026-06-17

Description

A library index page in NuPoint Messenger in Mitel MiCollab before 9.2 FP1 could allow an unauthenticated attacker to gain access (view and modify) to user data.

Frequently asked questions

What is CVE-2020-35547?: A library index page in NuPoint Messenger in Mitel MiCollab before 9.2 FP1 could allow an unauthenticated attacker to gain access (view and modify) to user data.
How severe is CVE-2020-35547?: CVE-2020-35547 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 high, integrity high, and availability none.
Is CVE-2020-35547 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35547?: CVE-2020-35547 affects Mitel Micollab. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-35547?: 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-2020-35547 published?: CVE-2020-35547 was published on 2021-01-29 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:mitel:micollab:*:*:*:*:*:-:*:*

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