CVE-2016-20037

xwpe 1.5.30a-2.1 Stack-based Buffer Overflow

8.6 High

xwpe 1.5.30a-2.1 and prior contains a stack-based buffer overflow vulnerability that allows local attackers to execute arbitrary code by supplying overly long input strings that exceed buffer boundaries. Attackers can craft malicious command-line arguments with 262 bytes of junk data followed by shellcode to overwrite the instruction pointer and achieve code execution or denial of service.

Attack profile

How easy it is to exploit

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

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.15%Up 0.1 points since Mar 28, 2026

What each source reports

CVE List Score used 8.6

xwpe 1.5.30a-2.1 Stack-based Buffer Overflow

Record: CVE-2016-20037
CVSS 4.0: 8.6 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-787
Updated: 2026-11-02

EUVDEUVD-2016-10829 8.6

Record: EUVD-2016-10829
CVSS 4.0: 8.6 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-h5rx-j6xv-4329 8.6

xwpe 1.5.30a-2.1 and prior contains a stack-based buffer overflow vulnerability that allows local...

Record: GHSA-h5rx-j6xv-4329
CVSS 4.0: 8.6 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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: 8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-787
Updated: 2026-11-02

NVD 8.6

Record: CVE-2016-20037
CVSS 4.0: 8.6 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/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: 8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-787
Updated: 2026-11-02

OSVDEBIAN-CVE-2016-20037 8.4

Record: DEBIAN-CVE-2016-20037
CVSS 3.1: 8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVUBUNTU-CVE-2016-20037 8.6

Record: UBUNTU-CVE-2016-20037
CVSS 4.0: 8.6 HighCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 8.4 HighCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

identicalsoftware xwpe

Affected packages

Affected packages
Package	Affected	Fixed
`xwpe` Ubuntu:16.04:LTS	All versions, plus listed versions 1.5.30a-2.11.5.30a-2.1build1	None known
`xwpe` Ubuntu:18.04:LTS	All versions, plus listed versions 1.5.30a-2.1build11.5.30a-2.1build2	None known
`xwpe` Ubuntu:20.04:LTS	All versions, plus listed versions 1.5.30a-2.1build3	None known
`xwpe` Ubuntu:22.04:LTS	All versions, plus listed versions 1.5.30a-3	None known
`xwpe` Ubuntu:24.04:LTS	All versions, plus listed versions 1.5.30a-31.5.30a-41.5.30a-4build1	None known
`xwpe` Ubuntu:25.10	All versions, plus listed versions 1.5.30a-4build1	None known
`xwpe` Ubuntu:26.10	All versions, plus listed versions 1.5.30a-4build11.5.30a-4.11.6.3-11.6.6-1	None known
`xwpe` Ubuntu:26.04:LTS	All versions, plus listed versions 1.5.30a-4build1	None known

History

History
Recorded	Changed	Sources
Nov 10, 2026	facts
Nov 3, 2026	affected
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-2016-20037 is a high vulnerability (CVSS 8.6) in Identicalsoftware Xwpe, published March 28, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.15%, the 4th percentile. No source names a fixed version.