CVE-2016-0787

5.9 MEDIUM 3% exploit odds Fix listed

What it is

The diffie_hellman_sha256 function in kex.c in libssh2 before 1.7.0 improperly truncates secrets to 128 or 256 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."

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure.
Exploit odds: 2.6% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2016-04-13 17:59 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 00:38 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 2.6% in the next 30 days (EPSS).
Severity: 5.9 MEDIUM (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2016-04-13 17:59 UTC
Last modified: 2026-06-17 00:38 UTC
Exploit probability: 2.6% · EPSS, next 30 days
Weakness: CWE-200 · Information exposure
Record status: Modified

Affected

Fedoraproject Fedora 22
Fedoraproject Fedora 23
Opensuse 13.2
libssh2 ≤ 1.6.0
Debian Linux 7.0
Debian Linux 8.0

Attack profile CVSS 3.0 · 5.9

Attack vector: Network
Complexity: High
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Raw vector

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

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2016-0787.md and follow it. Check whether this project is affected by CVE-2016-0787. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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Fix and advisories

References

NVD record · CVE.org record