How severe is CVE-2026-53408?

CVE-2026-53408 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2026-53408 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-53408?

CVE-2026-53408 primarily affects Zoom Meeting Software Development Kit. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-53408?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-53408 have an EU (EUVD) identifier?

Yes. CVE-2026-53408 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36523.

When was CVE-2026-53408 published?

CVE-2026-53408 was published on 2026-06-12 and last updated on 2026-06-17.

CVE-2026-53408

CVE-2026-53408 is a high-severity vulnerability in Zoom Meeting Software Development Kit with a CVSS 3.x base score of 8.1. 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-939.

Key facts

Severity: High (CVSS 3.x base score 8.1)
EPSS exploit prediction: 0% (11th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-36523
Weakness: CWE-939
Affected product: Zoom Meeting Software Development Kit
Published: 2026-06-12
Last modified: 2026-06-17

Description

Improper Authorization in Handler for Custom URL Scheme in Zoom Workplace before version 7.0.4 for Android and before 7.0.3 for iOS may allow an unauthenticated user to conduct an escalation of privilege via network access.

Frequently asked questions

What is CVE-2026-53408?: Improper Authorization in Handler for Custom URL Scheme in Zoom Workplace before version 7.0.4 for Android and before 7.0.3 for iOS may allow an unauthenticated user to conduct an escalation of privilege via network access.
How severe is CVE-2026-53408?: CVE-2026-53408 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2026-53408 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (11th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-53408?: CVE-2026-53408 primarily affects Zoom Meeting Software Development Kit. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-53408?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-53408 have an EU (EUVD) identifier?: Yes. CVE-2026-53408 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-36523.
When was CVE-2026-53408 published?: CVE-2026-53408 was published on 2026-06-12 and last updated on 2026-06-17.

References

https://www.zoom.com/en/trust/security-bulletin/zsb-26010

Affected products (4)

cpe:2.3:a:zoom:meeting_software_development_kit:*:*:*:*:*:iphone_os:*:*
cpe:2.3:a:zoom:meeting_software_development_kit:*:*:*:*:*:android:*:*
cpe:2.3:a:zoom:workplace:*:*:*:*:*:iphone_os:*:*
cpe:2.3:a:zoom:workplace:*:*:*:*:*:android:*:*

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