Is CVE-2016-0739 in the CISA KEV catalog?

No. CVE-2016-0739 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2016-0739?

CVE-2016-0739 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2016-0739?

CVE-2016-0739 has an EPSS score of 2.43% (82th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2016-0739?

Upgrade libssh on debian 11 to 0.6.3-4.3 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2016-0739

MEDIUMEPSS 82th pctl

5.9

CVSS v3

NVD

Description

libssh before 0.7.3 improperly truncates ephemeral secrets generated for the (1) diffie-hellman-group1 and (2) diffie-hellman-group14 key exchange methods to 128 bits, which makes it easier for man-in-the-middle attackers to decrypt or intercept SSH sessions via unspecified vectors, aka a "bits/bytes confusion bug."

CWE-200Information Exposure

How to fix

Remediation Available

libsshDebian

Fixed in:0.6.3-4.3CVE-2016-0739

libsshUbuntu

Fixed in:0.6.1-0ubuntu3.3USN-2912-1

libssh-4Ubuntu

Fixed in:0.6.1-0ubuntu3.3USN-2912-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploit Intelligence

2.43%probability of exploitation in 30 days

82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

Vendor Advisory2

Third-Party Advisory1

security.gentoo.org

Other references7

Related Vulnerabilities

Other CWE-200 (Information Exposure) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-24919	High	8.6	100%	KEV + Ransom	-
CVE-2020-14181	Medium	5.3	100%	-	Fix
CVE-2021-34429	Medium	5.3	99%	-	Fix
CVE-2018-11409	Medium	5.3	98%	-	-
CVE-2021-41277	Critical	10.0	97%	KEV	-
CVE-2016-2183	High	7.5	96%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-05-06.