Is CVE-2026-53408 in the CISA KEV catalog?

No. CVE-2026-53408 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2026-53408?

CVE-2026-53408 has a CVSS v3 base score of 8.1 (HIGH).

What is the EPSS score for CVE-2026-53408?

CVE-2026-53408 has an EPSS score of 0.21% (11th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2026-53408?

Upgrade meeting software development kit to 7.0.3 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2026-53408

HIGH

8.1

CVSS v3

NVD

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.

CWE-939

How to fix

Remediation Available

meeting software development kitNVD

Affected:< 7.0.3Fixed in:7.0.3CVE-2026-53408derived from NVD

Affected:< 7.0.4Fixed in:7.0.4CVE-2026-53408derived from NVD

workplaceNVD

Affected:< 7.0.3Fixed in:7.0.3CVE-2026-53408derived from NVD

Affected:< 7.0.4Fixed in:7.0.4CVE-2026-53408derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Exploit Intelligence

0.21%probability of exploitation in 30 days

11thpercentile

Low risk: more likely to be exploited than 11% of all known CVEs.

References

Vendor Advisory1

zoom.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-16.