CVEDB API

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-11771

OpenVPN version 2.1.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows attackers via an off-by-one buffer write in the NTLM proxy authentication to potentially cause a crash via a crafted NTLM response from a malicious proxy server

Exploit prediction scoring system (EPSS) score

EPSS Score 0.003

EPSS Ranking 26.8%

CVSS Severity

CVSS v3 Score 7.5

References

Products affected by CVE-2026-11771

Openvpn » Openvpn » Version: 2.1.0

cpe:2.3:a:openvpn:openvpn:2.1.0
Openvpn » Openvpn » Version: 2.1.1

cpe:2.3:a:openvpn:openvpn:2.1.1
Openvpn » Openvpn » Version: 2.1.12

cpe:2.3:a:openvpn:openvpn:2.1.12
Openvpn » Openvpn » Version: 2.1.2

cpe:2.3:a:openvpn:openvpn:2.1.2
Openvpn » Openvpn » Version: 2.1.28.0

cpe:2.3:a:openvpn:openvpn:2.1.28.0
Openvpn » Openvpn » Version: 2.1.3

cpe:2.3:a:openvpn:openvpn:2.1.3
Openvpn » Openvpn » Version: 2.1.4

cpe:2.3:a:openvpn:openvpn:2.1.4
Openvpn » Openvpn » Version: 2.1.6

cpe:2.3:a:openvpn:openvpn:2.1.6
Openvpn » Openvpn » Version: 2.1.8

cpe:2.3:a:openvpn:openvpn:2.1.8
Openvpn » Openvpn » Version: 2.1.9

cpe:2.3:a:openvpn:openvpn:2.1.9
Openvpn » Openvpn » Version: 2.2.0

cpe:2.3:a:openvpn:openvpn:2.2.0
Openvpn » Openvpn » Version: 2.2.1

cpe:2.3:a:openvpn:openvpn:2.2.1
Openvpn » Openvpn » Version: 2.2.2

cpe:2.3:a:openvpn:openvpn:2.2.2
Openvpn » Openvpn » Version: 2.2.3

cpe:2.3:a:openvpn:openvpn:2.2.3
Openvpn » Openvpn » Version: 2.3.0

cpe:2.3:a:openvpn:openvpn:2.3.0
Openvpn » Openvpn » Version: 2.3.1

cpe:2.3:a:openvpn:openvpn:2.3.1
Openvpn » Openvpn » Version: 2.3.10

cpe:2.3:a:openvpn:openvpn:2.3.10
Openvpn » Openvpn » Version: 2.3.11

cpe:2.3:a:openvpn:openvpn:2.3.11
Openvpn » Openvpn » Version: 2.3.12

cpe:2.3:a:openvpn:openvpn:2.3.12
Openvpn » Openvpn » Version: 2.3.13

cpe:2.3:a:openvpn:openvpn:2.3.13
Openvpn » Openvpn » Version: 2.3.14

cpe:2.3:a:openvpn:openvpn:2.3.14
Openvpn » Openvpn » Version: 2.3.15

cpe:2.3:a:openvpn:openvpn:2.3.15
Openvpn » Openvpn » Version: 2.3.16

cpe:2.3:a:openvpn:openvpn:2.3.16
Openvpn » Openvpn » Version: 2.3.17

cpe:2.3:a:openvpn:openvpn:2.3.17
Openvpn » Openvpn » Version: 2.3.18

cpe:2.3:a:openvpn:openvpn:2.3.18
Openvpn » Openvpn » Version: 2.3.2

cpe:2.3:a:openvpn:openvpn:2.3.2
Openvpn » Openvpn » Version: 2.3.3

cpe:2.3:a:openvpn:openvpn:2.3.3
Openvpn » Openvpn » Version: 2.3.4

cpe:2.3:a:openvpn:openvpn:2.3.4
Openvpn » Openvpn » Version: 2.3.5

cpe:2.3:a:openvpn:openvpn:2.3.5
Openvpn » Openvpn » Version: 2.3.6

cpe:2.3:a:openvpn:openvpn:2.3.6
Openvpn » Openvpn » Version: 2.3.7

cpe:2.3:a:openvpn:openvpn:2.3.7
Openvpn » Openvpn » Version: 2.3.8

cpe:2.3:a:openvpn:openvpn:2.3.8
Openvpn » Openvpn » Version: 2.3.9

cpe:2.3:a:openvpn:openvpn:2.3.9
Openvpn » Openvpn » Version: 2.4.0

cpe:2.3:a:openvpn:openvpn:2.4.0
Openvpn » Openvpn » Version: 2.4.1

cpe:2.3:a:openvpn:openvpn:2.4.1
Openvpn » Openvpn » Version: 2.4.10

cpe:2.3:a:openvpn:openvpn:2.4.10
Openvpn » Openvpn » Version: 2.4.11

cpe:2.3:a:openvpn:openvpn:2.4.11
Openvpn » Openvpn » Version: 2.4.12

cpe:2.3:a:openvpn:openvpn:2.4.12
Openvpn » Openvpn » Version: 2.4.2

cpe:2.3:a:openvpn:openvpn:2.4.2
Openvpn » Openvpn » Version: 2.4.3

cpe:2.3:a:openvpn:openvpn:2.4.3
Openvpn » Openvpn » Version: 2.4.4

cpe:2.3:a:openvpn:openvpn:2.4.4
Openvpn » Openvpn » Version: 2.4.5

cpe:2.3:a:openvpn:openvpn:2.4.5
Openvpn » Openvpn » Version: 2.4.6

cpe:2.3:a:openvpn:openvpn:2.4.6
Openvpn » Openvpn » Version: 2.4.7

cpe:2.3:a:openvpn:openvpn:2.4.7
Openvpn » Openvpn » Version: 2.4.8

cpe:2.3:a:openvpn:openvpn:2.4.8
Openvpn » Openvpn » Version: 2.4.9

cpe:2.3:a:openvpn:openvpn:2.4.9
Openvpn » Openvpn » Version: 2.5.0

cpe:2.3:a:openvpn:openvpn:2.5.0
Openvpn » Openvpn » Version: 2.5.1

cpe:2.3:a:openvpn:openvpn:2.5.1
Openvpn » Openvpn » Version: 2.5.10

cpe:2.3:a:openvpn:openvpn:2.5.10
Openvpn » Openvpn » Version: 2.5.11

cpe:2.3:a:openvpn:openvpn:2.5.11
Openvpn » Openvpn » Version: 2.5.2

cpe:2.3:a:openvpn:openvpn:2.5.2
Openvpn » Openvpn » Version: 2.5.3

cpe:2.3:a:openvpn:openvpn:2.5.3
Openvpn » Openvpn » Version: 2.5.4

cpe:2.3:a:openvpn:openvpn:2.5.4
Openvpn » Openvpn » Version: 2.5.5

cpe:2.3:a:openvpn:openvpn:2.5.5
Openvpn » Openvpn » Version: 2.5.6

cpe:2.3:a:openvpn:openvpn:2.5.6
Openvpn » Openvpn » Version: 2.5.7

cpe:2.3:a:openvpn:openvpn:2.5.7
Openvpn » Openvpn » Version: 2.5.8

cpe:2.3:a:openvpn:openvpn:2.5.8
Openvpn » Openvpn » Version: 2.5.9

cpe:2.3:a:openvpn:openvpn:2.5.9
Openvpn » Openvpn » Version: 2.6.0

cpe:2.3:a:openvpn:openvpn:2.6.0
Openvpn » Openvpn » Version: 2.6.1

cpe:2.3:a:openvpn:openvpn:2.6.1
Openvpn » Openvpn » Version: 2.6.10

cpe:2.3:a:openvpn:openvpn:2.6.10
Openvpn » Openvpn » Version: 2.6.11

cpe:2.3:a:openvpn:openvpn:2.6.11
Openvpn » Openvpn » Version: 2.6.12

cpe:2.3:a:openvpn:openvpn:2.6.12
Openvpn » Openvpn » Version: 2.6.13

cpe:2.3:a:openvpn:openvpn:2.6.13
Openvpn » Openvpn » Version: 2.6.14

cpe:2.3:a:openvpn:openvpn:2.6.14
Openvpn » Openvpn » Version: 2.6.15

cpe:2.3:a:openvpn:openvpn:2.6.15
Openvpn » Openvpn » Version: 2.6.16

cpe:2.3:a:openvpn:openvpn:2.6.16
Openvpn » Openvpn » Version: 2.6.17

cpe:2.3:a:openvpn:openvpn:2.6.17
Openvpn » Openvpn » Version: 2.6.18

cpe:2.3:a:openvpn:openvpn:2.6.18
Openvpn » Openvpn » Version: 2.6.19

cpe:2.3:a:openvpn:openvpn:2.6.19
Openvpn » Openvpn » Version: 2.6.2

cpe:2.3:a:openvpn:openvpn:2.6.2
Openvpn » Openvpn » Version: 2.6.20

cpe:2.3:a:openvpn:openvpn:2.6.20
Openvpn » Openvpn » Version: 2.6.3

cpe:2.3:a:openvpn:openvpn:2.6.3
Openvpn » Openvpn » Version: 2.6.4

cpe:2.3:a:openvpn:openvpn:2.6.4
Openvpn » Openvpn » Version: 2.6.5

cpe:2.3:a:openvpn:openvpn:2.6.5
Openvpn » Openvpn » Version: 2.6.6

cpe:2.3:a:openvpn:openvpn:2.6.6
Openvpn » Openvpn » Version: 2.6.7

cpe:2.3:a:openvpn:openvpn:2.6.7
Openvpn » Openvpn » Version: 2.6.8

cpe:2.3:a:openvpn:openvpn:2.6.8
Openvpn » Openvpn » Version: 2.6.9

cpe:2.3:a:openvpn:openvpn:2.6.9
Openvpn » Openvpn » Version: 2.7

cpe:2.3:a:openvpn:openvpn:2.7
Openvpn » Openvpn » Version: 2.7.0

cpe:2.3:a:openvpn:openvpn:2.7.0
Openvpn » Openvpn » Version: 2.7.1

cpe:2.3:a:openvpn:openvpn:2.7.1
Openvpn » Openvpn » Version: 2.7.2

cpe:2.3:a:openvpn:openvpn:2.7.2
Openvpn » Openvpn » Version: 2.7.3

cpe:2.3:a:openvpn:openvpn:2.7.3
Openvpn » Openvpn » Version: 2.7.4

cpe:2.3:a:openvpn:openvpn:2.7.4

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-11771

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