CVE•Published 2016-12-09•Modified 2026-05-29•1 article on news•6 live references•NVD data
CVE-2016-8858Openbsd · Openssh
Vulnerability data via NVD (ingested)
CVSS v3.1
7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS percentile
96
Exploit Prediction Scoring System · top 4% of all CVEs
Weaknesses (CWE)
Description
The kex_input_kexinit function in kex.c in OpenSSH 6.x and 7.x through 7.3 allows remote attackers to cause a denial of service (memory consumption) by sending many duplicate KEXINIT requests. NOTE: a third party reports that "OpenSSH upstream does not consider this as a security issue."
Timeline
Published 2016-12-09
Modified 2026-05-29
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 tag35,969 hosts
vuln:CVE-2016-8858Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product + version
product:"Openbsd Openssh" version:"6.8"Version-pinned fingerprint from NVD's first vulnerable CPE.
Shodan · banner/body mention
http.html:"Openssh"HTTP body or banner mentions "Openssh" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2016-8858Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2016-8858Censys host search filtered to this CVE id.
grep.app
CVE-2016-8858Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2016-8858GitHub code search for direct mentions.
Google dork
"CVE-2016-8858" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.