CVE-2018-10933

CRITICALNVD 9.19.1—Trending — 4 sources updated this weekWeaponized

9.1

A vulnerability was found in libssh's server-side state machine before versions 0.7.6 and 0.8.4. A malicious client could create channels without first performing authentication, resulting in unauthorized access.

CVSS v3: 9.1
EG Score: 9.1(medium)
EPSS: 99.0%
KEV: Not listed

Published

October 17, 2018

Last Modified

November 21, 2024

References (22)

secalert@redhathttp://www.securityfocus.com/bid/105677
secalert@redhathttps://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10933
secalert@redhathttps://lists.debian.org/debian-lts-announce/2018/10/msg00010.html
secalert@redhathttps://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0016
secalert@redhathttps://security.netapp.com/advisory/ntap-20190118-0002/
secalert@redhathttps://usn.ubuntu.com/3795-1/
secalert@redhathttps://usn.ubuntu.com/3795-2/
secalert@redhathttps://www.debian.org/security/2018/dsa-4322
secalert@redhathttps://www.exploit-db.com/exploits/45638/
secalert@redhathttps://www.libssh.org/security/advisories/CVE-2018-10933.txt
secalert@redhathttps://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/105677
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10933
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2018/10/msg00010.html
af854a3a-2127-422b-91ae-364da2661108https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2018-0016

Patch Availability(3)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	libssh-4 (0.8.1-1ubuntu0.1) @ cosmic	2026-05-28	ubuntu
ubuntu	libssh-gcrypt-dev (0.6.3-4.3ubuntu0.1) @ xenial	2026-05-28	ubuntu
redhat	libssh-0:0.7.1-7.el7	2018-11-28	redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(3)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 9× in last 7d / 12× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-01 13:49 UTCepss_batch
2026-06-01 13:49 UTCepss_batch
2026-05-31 22:28 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:41 UTCepss_batch
2026-05-28 01:55 UTCEG score recompute
2026-05-28 01:55 UTCVendor advisory
2026-05-28 01:55 UTCGHSA enrichment
2026-05-27 13:38 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-26 00:16 UTCOSV refresh

Publicly available exploits

(10 references)

Working exploit code is in the public domain (8 GitHub PoCs) (2 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCHSw109/CVE-2018-10933
First seen Apr 1, 2024
Education purpose for CVE-2018-10933
Open source ↗
GitHub PoCnikhil1232/LibSSH-Authentication-Bypass
First seen Dec 19, 2018
LibSSH Authentication Bypass CVE-2018-10933
Open source ↗
Exploit-DBEDB-46307✓ verified
First seen Oct 20, 2018
LibSSH 0.7.6 / 0.8.4 - Unauthorized Access
Open source ↗
GitHub PoCjas502n/CVE-2018-10933
First seen Oct 20, 2018
libssh CVE-2018-10933
Open source ↗
GitHub PoCVirgula0/POC-CVE-2018-10933
First seen Oct 20, 2018
LibSSH Authentication Bypass Exploit using RCE
Open source ↗
Exploit-DBEDB-45638
First seen Oct 18, 2018
libSSH - Authentication Bypass
Open source ↗
GitHub PoChackerhouse-opensource/cve-2018-10933
First seen Oct 18, 2018
cve-2018-10933 libssh authentication bypass
Open source ↗
GitHub PoCmarco-lancini/hunt-for-cve-2018-10933
First seen Oct 18, 2018
Hunt for and Exploit the libSSH Authentication Bypass (CVE-2018-10933)
Open source ↗
GitHub PoCSoledaD208/CVE-2018-10933
First seen Oct 17, 2018
CVE-2018-10933 very simple POC
Open source ↗
GitHub PoCblacknbunny/CVE-2018-10933
First seen Oct 17, 2018
Spawn to shell without any credentials by using CVE-2018-10933 (LibSSH)
Open source ↗

Frequently asked(5)

What is CVE-2018-10933?

CVE-2018-10933 is a critical vulnerability published on October 17, 2018. A vulnerability was found in libssh's server-side state machine before versions 0.7.6 and 0.8.4. A malicious client could create channels without first performing authentication, resulting in unauthorized access.

When was CVE-2018-10933 disclosed?

CVE-2018-10933 was first published in the National Vulnerability Database on October 17, 2018, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2018-10933 actively exploited?

CVE-2018-10933 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2018-10933?

CVE-2018-10933 has a CVSS v3 base score of 9.1 (NVD).

How do I remediate CVE-2018-10933?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2018-10933, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2018-10933

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CVE-2018-10933

Published

Last Modified

References (22)

Patch Availability(3)

Weakness Classification(2)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-10933?

Same vendor

Same CWE

CVE-2018-10933

📅 Published

🔄 Last Modified

🔗 References (22)

Patch Availability(3)

Weakness Classification(2)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2018-10933?

🔗 Related CVEs(same vendor + same CWE)

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References (22)

Frequently asked(5)

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