CVE-2020-37182

Redir 3.3 - Denial of Service

8.7 High

Redir 3.3 contains a stack overflow vulnerability in the doproxyconnect() function that allows attackers to crash the application by sending oversized input. Attackers can exploit the sprintf() buffer without proper length checking to overwrite memory and cause a segmentation fault, resulting in program termination.

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: None
Availability: High

Exploit likelihood

0.57%Up 0.5 points since Feb 12, 2026

What each source reports

CVE List Score used 8.7

Redir 3.3 - Denial of Service

Record: CVE-2020-37182
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-121
Updated: 2026-11-02

EUVDEUVD-2020-31129 8.7

Record: EUVD-2020-31129
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-64v7-64h5-r58h 8.7

Redir 3.3 contains a stack overflow vulnerability in the doproxyconnect() function that allows...

Record: GHSA-64v7-64h5-r58h
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-121
Updated: 2026-11-02

NVD 8.7

Record: CVE-2020-37182
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-121
Updated: 2026-11-02

OSV 7.5

Record: CVE-2020-37182
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2020-37182 8.7

Record: DEBIAN-CVE-2020-37182
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Updated: 2026-11-02

OSVUBUNTU-CVE-2020-37182 8.7

Record: UBUNTU-CVE-2020-37182
CVSS 4.0: 8.7 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

troglobit redir

Affected packages

Affected packages
Package	Affected	Fixed
`redir` Debian:12	All versions, plus listed versions 3.3-1	None known
`redir` Debian:13	All versions, plus listed versions 3.3-1	None known
`redir` Debian:14	All versions, plus listed versions 3.3-1	None known
`redir` Ubuntu:16.04:LTS	All versions, plus listed versions 2.2.1-13	None known
`redir` Ubuntu:18.04:LTS	All versions, plus listed versions 3.1-1	None known
`redir` Ubuntu:20.04:LTS	All versions, plus listed versions 3.2-1	None known
`redir` Ubuntu:22.04:LTS	All versions, plus listed versions 3.3-1	None known
`redir` Ubuntu:24.04:LTS	All versions, plus listed versions 3.3-1	None known
`redir` Ubuntu:25.10	All versions, plus listed versions 3.3-1	None known
`redir` Ubuntu:26.10	All versions, plus listed versions 3.3-1build1	None known
`redir` Ubuntu:26.04:LTS	All versions, plus listed versions 3.3-13.3-1build1	None known

History

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

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

In short

CVE-2020-37182 is a high vulnerability (CVSS 8.7) in Troglobit Redir, published February 11, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.57%, the 47th percentile. No source names a fixed version.