CVE•Published 2026-05-04•Modified 2026-05-11•0 articles on news•6 live references•NVD data
CVE-2026-43964Postfix · Postfix
Vulnerability data via NVD (ingested)
CVSS v3.1
3.7
LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS percentile
11
Exploit Prediction Scoring System · top 89% of all CVEs
Weaknesses (CWE)
Description
Postfix before 3.8.16, 3.9 before 3.9.10, and 3.10 before 3.10.9 sometimes allows a buffer over-read and process crash via an enhanced status code that lacks text after the third number.
Timeline
Published 2026-05-04
Modified 2026-05-11
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).
Shodan · vuln tag205 hosts
vuln:CVE-2026-43964Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Postfix Postfix"All exposed Postfix Postfix instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Postfix"HTTP body or banner mentions "Postfix" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-43964Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-43964Censys host search filtered to this CVE id.
grep.app
CVE-2026-43964Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-43964GitHub code search for direct mentions.
Google dork
"CVE-2026-43964" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-43964 on GitHub.
We haven't classified any articles referencing CVE-2026-43964 yet. The external references above still apply.