CVE•Published 2026-04-30•Modified 2026-05-01•0 articles on news•5 live references•NVD data
CVE-2026-40685Exim · Exim
Vulnerability data via NVD (ingested)
CVSS v3.1
6.5
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
EPSS percentile
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Description
In Exim before 4.99.2, when JSON lookup is enabled, an out-of-bounds heap write can occur when a JSON operator encounters malformed JSON in an untrusted header, because of an incorrect implementation of \ skipping.
Timeline
Published 2026-04-30
Modified 2026-05-01
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 tag524,838 hosts
vuln:CVE-2026-40685Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Exim Exim"All exposed Exim Exim instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Exim"HTTP body or banner mentions "Exim" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-40685Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-40685Censys host search filtered to this CVE id.
grep.app
CVE-2026-40685Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-40685GitHub code search for direct mentions.
Google dork
"CVE-2026-40685" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-40685 on GitHub.
We haven't classified any articles referencing CVE-2026-40685 yet. The external references above still apply.