CVE-2021-44513

Insecure creation of temporary directories in tmate-ssh-server 2.3.0 allows a local attacker to...

7.0 HighFix available

Insecure creation of temporary directories in tmate-ssh-server 2.3.0 allows a local attacker to compromise the integrity of session handling.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: High
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.22%Down 0.1 points since Dec 7, 2021

What each source reports

NVD Score used 7.0

Insecure creation of temporary directories in tmate-ssh-server 2.3.0 allows a local attacker to compromise the integrity of session handling.

Record: CVE-2021-44513
CVSS 3.1: 7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0: 4.4 MediumAV:L/AC:M/Au:N/C:P/I:P/A:P
Weakness: CWE-362
Updated: 2026-11-02

CVE List No score

Insecure creation of temporary directories in tmate-ssh-server 2.3.0 allows a local attacker to compromise the integrity of session handling.

Record: CVE-2021-44513
Updated: 2026-11-02

EUVDEUVD-2021-31346 No score

Insecure creation of temporary directories in tmate-ssh-server 2.3.0 allows a local attacker to compromise the integrity of session handling.

Record: EUVD-2021-31346
Updated: 2026-11-03

GitHub AdvisoriesGHSA-hhg7-mpgg-68qf No score

Insecure creation of temporary directories in tmate-ssh-server 2.3.0 allows a local attacker to...

Insecure creation of temporary directories in tmate-ssh-server 2.3.0 allows a local attacker to compromise the integrity of session handling.

Record: GHSA-hhg7-mpgg-68qf
Weakness: CWE-362
Updated: 2026-11-02

OSV 7.0

Insecure creation of temporary directories in tmate-ssh-server 2.3.0 allows a local attacker to compromise the integrity of session handling.

Record: CVE-2021-44513
CVSS 3.1: 7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2021-44513 7.0

Insecure creation of temporary directories in tmate-ssh-server 2.3.0 allows a local attacker to compromise the integrity of session handling.

Record: DEBIAN-CVE-2021-44513
CVSS 3.1: 7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2021-44513 7.0

Insecure creation of temporary directories in tmate-ssh-server 2.3.0 allows a local attacker to compromise the integrity of session handling.

Record: UBUNTU-CVE-2021-44513
CVSS 3.1: 7.0 HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

tmate tmate-ssh-server

Affected packages

Affected packages
Package	Affected	Fixed
`tmate-ssh-server` Debian:13	before 2.3.0-68-gd7334ee4-1	2.3.0-68-gd7334ee4-1
`tmate-ssh-server` Debian:14	before 2.3.0-68-gd7334ee4-1	2.3.0-68-gd7334ee4-1
`tmate-ssh-server` Ubuntu:22.04:LTS	All versions, plus listed versions 2.3.0-49-g97d20249-1	None known
`tmate-ssh-server` Ubuntu:24.04:LTS	All versions, plus listed versions 2.3.0-68-gd7334ee4-12.3.0-68-gd7334ee4-1build1	None known
`tmate-ssh-server` Ubuntu:25.10	All versions, plus listed versions 2.3.0-68-gd7334ee4-2	None known
`tmate-ssh-server` Ubuntu:26.10	All versions, plus listed versions 2.3.0-68-gd7334ee4-2build1	None known
`tmate-ssh-server` Ubuntu:26.04:LTS	All versions, plus listed versions 2.3.0-68-gd7334ee4-22.3.0-68-gd7334ee4-2build1	None known

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-2021-44513 is a high vulnerability (CVSS 7.0) in Tmate Tmate-ssh-server, published December 7, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.22%, the 12th percentile. Fixed in tmate-ssh-server 2.3.0-68-gd7334ee4-1.

Attack profile

How easy it is to exploit

What an attacker can affect

Exploit likelihood

What each source reports

Affected products

Affected packages

History

In short

References