CVE-2026-84732: openvpn Integer Overflow or Wraparound
CVSS: 8.7v4.0HighAwaiting analysis
AliasesALPINE-CVE-2026-84732SUSE-SU-2026:4242-1UBUNTU-CVE-2026-84732DEBIAN-CVE-2026-84732
Published 07-09-2026Last modified 08-09-2026
Vulnerability summary
CVE-2026-84732 is a high (CVSS 8.7) Integer Overflow or Wraparound vulnerability in openvpn. EPSS estimates a 0.54% chance of exploitation in the next 30 days, higher than 44.8% of scored vulnerabilities.
CVSS score
8.7/10
010
High · v4.0 (CVE.org)EPSS score
0.54%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 5 · Related 4Timeline
- 07-09-2026PublishedVulnerability first disclosed.
- 08-09-2026Last modifiedVulnerability information updated.
Description
Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthenticated attackers to cause a denial of service via crafted inputs that trigger a timeout integer overflow
CVSS metrics
5 scores · 5 sources · 1 versionHigh 8.7Preferred score · CVE.org (CNA)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:LSourcesAll 5 agree
- OSV · AlpineEcosystem advisory · calculated8.7HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/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
- OSV · UbuntuEcosystem advisory · calculated8.7HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L
- OSV · DebianEcosystem advisory · calculated8.7HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/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
- NVDNIST8.7HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L/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
EPSS trend
Probability
0.54%
Chance of exploitation in the next 30 days
Percentile
45%
Versus all other CVEs
30-day change
0.00 pp
From 0.54% on 21-09-2026
21-09-202621-10-2026
EPSS score0.54%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Suse2 products
- openvpn&distro=SUSE Linux Enterprise Server 12 SP5-LTSS< 2.3.8-16.38.1
- openvpn&distro=SUSE Linux Enterprise Server LTSS Extended Security 12 SP5< 2.3.8-16.38.1
Alpine1 product
- openvpn< 2.7.7-r0
Debian1 product
- openvpnAll versions (No fix recorded) | < 2.7.7-1
Openvpn1 product
- openvpn≤ 2.6.22 | ≤ 2.7.6
Ubuntu1 product
- openvpnAll versions (No fix recorded) | < 2.5.11-0ubuntu0.22.04.5 | < 2.6.19-0ubuntu0.24.04.4 | < 2.7.0-1ubuntu1.3
5 vendors · 6 products
