CVE-2018-16737

tinc before 1.0.30 has a broken authentication protocol, without even a partial mitigation.

5.3 MediumFix available

tinc before 1.0.30 has a broken authentication protocol, without even a partial mitigation.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: Low
Availability: None

Exploit likelihood

1.47%Up 0.8 points since Apr 14, 2021

What each source reports

NVD Score used 5.3

tinc before 1.0.30 has a broken authentication protocol, without even a partial mitigation.

Record: CVE-2018-16737
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:P/A:N
Weakness: CWE-287
Updated: 2026-11-02

CVE List No score

tinc before 1.0.30 has a broken authentication protocol, without even a partial mitigation.

Record: CVE-2018-16737
Updated: 2026-11-02

EUVDEUVD-2018-8537 No score

tinc before 1.0.30 has a broken authentication protocol, without even a partial mitigation.

Record: EUVD-2018-8537
Updated: 2026-11-03

GitHub AdvisoriesGHSA-86wc-mxwc-62wr 5.3

tinc before 1.0.30 has a broken authentication protocol, without even a partial mitigation.

tinc before 1.0.30 has a broken authentication protocol, without even a partial mitigation.

Record: GHSA-86wc-mxwc-62wr
CVSS 3.0: 5.3 MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Weakness: CWE-287
Updated: 2026-11-02

OSVALPINE-CVE-2018-16737 5.3

tinc before 1.0.30 has a broken authentication protocol, without even a partial mitigation.

Record: ALPINE-CVE-2018-16737
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSV 5.3

tinc before 1.0.30 has a broken authentication protocol, without even a partial mitigation.

Record: CVE-2018-16737
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2018-16737 5.3

tinc before 1.0.30 has a broken authentication protocol, without even a partial mitigation.

Record: DEBIAN-CVE-2018-16737
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2018-16737 5.3

tinc before 1.0.30 has a broken authentication protocol, without even a partial mitigation.

Record: UBUNTU-CVE-2018-16737
CVSS 3.1: 5.3 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Updated: 2026-11-02

OSVopenSUSE-SU-2024:11463-1 No score

tinc-1.0.36-1.9 on GA media

These are all security issues fixed in the tinc-1.0.36-1.9 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2024:11463-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`tinc` Alpine:v3.10	before 1.0.35-r0	1.0.35-r0
`tinc` Alpine:v3.11	before 1.0.35-r0	1.0.35-r0
`tinc` Alpine:v3.12	before 1.0.35-r0	1.0.35-r0
`tinc` Alpine:v3.13	before 1.0.35-r0	1.0.35-r0
`tinc` Alpine:v3.14	before 1.0.35-r0	1.0.35-r0
`tinc` Alpine:v3.15	before 1.0.35-r0	1.0.35-r0
`tinc` Alpine:v3.16	before 1.0.35-r0	1.0.35-r0
`tinc` Alpine:v3.17	before 1.0.35-r0	1.0.35-r0
`tinc` Alpine:v3.18	before 1.0.35-r0	1.0.35-r0
`tinc` Alpine:v3.19	before 1.0.35-r0	1.0.35-r0

Show 13 moreShow less

Affected packages
Package	Affected	Fixed
`tinc` Alpine:v3.20	before 1.0.35-r0	1.0.35-r0
`tinc` Alpine:v3.21	before 1.0.35-r0	1.0.35-r0
`tinc` Alpine:v3.22	before 1.0.35-r0	1.0.35-r0
`tinc` Alpine:v3.23	before 1.0.35-r0	1.0.35-r0
`tinc` Alpine:v3.24	before 1.0.35-r0	1.0.35-r0
`tinc` Alpine:v3.9	before 1.0.35-r0	1.0.35-r0
`tinc` Debian:12	before 1.0.31-1	1.0.31-1
`tinc` Debian:13	before 1.0.31-1	1.0.31-1
`tinc` Debian:14	before 1.0.31-1	1.0.31-1
`tinc` Debian:8	before 1.0.24-2+deb8u1	1.0.24-2+deb8u1
`tinc` Ubuntu:16.04:LTS	All versions, plus listed versions 1.0.26-1	None known
`tinc` Ubuntu:18.04:LTS	All versions, plus listed versions 1.0.31-11.0.32-11.0.33-11.0.33-1build1	None known
`tinc` openSUSE:Tumbleweed	before 1.0.36-1.9	1.0.36-1.9

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-16737 is a medium vulnerability (CVSS 5.3) in Tinc-vpn Tinc, published October 8, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.47%, the 73rd percentile. Fixed in tinc 1.0.35-r0.

References

Show 6 moreShow less