[NEU] [mittel] OpenVPN: Mehrere Schwachstellen
Ein lokaler Angreifer kann mehrere Schwachstellen in OpenVPN ausnutzen, um Code auszuführen, Daten zu manipulieren oder einen Denial of Service zu verursachen.
Details
Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-3202
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-780430.17% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 7% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-782210.12% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 2% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-817380.33% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 26% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-823120.10% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 1% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-842260.14% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-842560.38% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 31% of all EPSS-scored CVEs.
- Low exploitation riskCVE-2026-847320.54% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 44% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-78043 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-78221 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-81738 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-82312 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-84226 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-84256 | coverage & exploitation status | NVD · CVE.org |
| CVE-2026-84732 | coverage & exploitation status | NVD · CVE.org |
Same CVEs, other sources
How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.
- unknownOpenVPN security advisory (AV26-889)cccs
- unknownCVE-2026-84732: Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthentica…nvd
- unknownCVE-2026-84256: An argument parsing issue in OpenVPN 2.1_rc10 through 2.6.22 and 2.7_alpha1 through 2.7.6 on W…nvd
- unknownCVE-2026-84226: OpenVPN version 2.5.0 through 2.6.22 and 2.7_alpha1 through 2.7.6 on Windows allows local auth…nvd
- unknownCVE-2026-82312: OpenVPN 2.0.0 through 2.6.22 and 2.7_alpha1 through 2.7.6 on Windows allows local authenticate…nvd
- unknownCVE-2026-81738: OpenVPN 2.5.0 through 2.7.6 on Windows using the tap-windows6 driver allows attackers to trigg…nvd
- unknownCVE-2026-78221: An incorrect buffer size calculation in the Windows Interactive Service in OpenVPN 2.7_alpha1 …nvd
- unknownCVE-2026-78043: The Windows Interactive Service in OpenVPN 2.7_alpha1 through 2.7.6 allows local authenticated…nvd
Recent advisories for OpenVPN
A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.
- high[UPDATE] [hoch] OpenVPN: Mehrere Schwachstellencert-bund · 2026-09-10
- medium[UPDATE] [mittel] OpenVPN: Mehrere Schwachstellencert-bund · 2026-09-10
- unknownOpenVPN security advisory (AV26-889)cccs · 2026-09-08
- unknownCVE-2026-82325: A use-after-free vulnerability in the OpenVPN ovpn-dco-win driver version 2.5.0 through 2.8.6 …nvd · 2026-09-07
- unknownCVE-2026-84732: Retransmissions of ACK packet ID in OpenVPN through 2.6.22 and 2.7.6 allow remote unauthentica…nvd · 2026-09-07
- unknownCVE-2026-84256: An argument parsing issue in OpenVPN 2.1_rc10 through 2.6.22 and 2.7_alpha1 through 2.7.6 on W…nvd · 2026-09-07
More from CERT-Bund (BSI) Security Advisories
- medium[UPDATE] [mittel] OpenSSH: Mehrere Schwachstellen2026-09-10
- medium[UPDATE] [mittel] Linux Kernel: Mehrere Schwachstellen2026-09-10
- high[UPDATE] [hoch] OpenVPN: Mehrere Schwachstellen2026-09-10
- medium[UPDATE] [mittel] gzip: Mehrere Schwachstellen2026-09-10
- medium[UPDATE] [mittel] Linux Kernel: Mehrere Schwachstellen2026-09-10