CVE catalog
CVE-2026-78221
openvpn: CVE-2026-78221
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.12% · Oct 25, 2026
An incorrect buffer size calculation in the Windows Interactive Service in OpenVPN 2.7_alpha1 through 2.7.6 allows local authenticated users to cause memory corruption or disclose sensitive information via crafted NRPT inputs.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | openvpn | sid | 2.7.8-1 | not affected |
| Debian | openvpn | forky | 2.7.8-1 | not affected |
| Debian | openvpn | trixie | 2.6.14-1+deb13u3 | not affected |
| Debian | openvpn | trixie-security | 2.6.14-1+deb13u3 | not affected |
| Debian | openvpn | bookworm | 2.6.14-0+deb12u2 | not affected |
| Debian | openvpn | bookworm-security | 2.6.14-0+deb12u2 | not affected |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | openvpn | source | sid | Not affected | unimportant | Not reported | Not reported |
| Debian | openvpn | source | forky | Not affected | unimportant | Not reported | Not reported |
| Debian | openvpn | source | trixie | Not affected | unimportant | Not reported | Not reported |
| Debian | openvpn | source | bookworm | Not affected | unimportant | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [openvpn]Not affected
Details (4)
2.6.14-0+deb12u2· amd64 · bookwormNot affected
dsa · openvpn · debian · bookworm
2.6.14-0+deb12u2· arm64 · bookwormNot affected
dsa · openvpn · debian · bookworm
2.6.14-0+deb12u2· amd64 · bookworm-securityNot affected
dsa · openvpn · debian · bookworm
2.6.14-0+deb12u2· arm64 · bookworm-securityNot affected
dsa · openvpn · debian · bookworm
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-78221]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2026-78221]
- [https://security-tracker.debian.org/tracker/CVE-2026-78221]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-78221.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-3202.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]