Review reviewHigh
CVE-2026-16404
Mozilla Firefox, firefox mobile
Spoofing issue in Firefox for Android. This vulnerability was fixed in Firefox 153.
- CVSS
- 7.4
- EPSS
- 0.16% 5.66% percentile
- CISA KEV
- Not listed
- Published
- 2026.07.21
Review review
The CVSS severity warrants an early asset and exposure review.
Known exploitationNot established by KEV
Exploit probability0.16%
Technical severityCVSS 7.4
Vulnerability overview
Spoofing issue in Firefox for Android. This vulnerability was fixed in Firefox 153.
Affected product and versions
- Product
- Mozilla Firefox, firefox mobile
- Affected versions
- < 153.0
- Fixed versions
- 153.0
Recommended response sequence
Confirm exposure before applying a vendor-supported change.
- 1Identify
Confirm that Mozilla Firefox, firefox mobile and an affected version are present.
- 2Prioritize
Combine exploitation signals with asset exposure and business criticality.
- 3Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
- 4Verify
Recheck the version, service health, access paths, and relevant logs.
Technical data
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N
- CWE
- CWE-290