CVE•Published 2026-07-21•Modified 2026-07-24•0 articles on news•4 live references•NVD data
CVE-2026-16403Mozilla · Firefox
Vulnerability data via NVD (ingested)
CVSS v3.1
6.5
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
EPSS percentile
3
Exploit Prediction Scoring System · top 97% of all CVEs
Description
Spoofing issue in the Address Bar component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.
Timeline
Published 2026-07-21
Modified 2026-07-24
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common). Live host counts are a Premium feature.
Shodan · vuln tag
vuln:CVE-2026-16403Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Mozilla Firefox"All exposed Mozilla Firefox instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Firefox"HTTP body or banner mentions "Firefox" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-16403Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-16403Censys host search filtered to this CVE id.
grep.app
CVE-2026-16403Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-16403GitHub code search for direct mentions.
Google dork
"CVE-2026-16403" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (1)
We haven't classified any articles referencing CVE-2026-16403 yet. The external references above still apply.