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01 Record

CVE-2024-1305

tap-windows6 driver version 9.26 and earlier does not properly check the size data of incomming write operations which an attacker can use to overflow memory buffers, resulting in a bug check and

CriticalPUBLISHEDCNA: OpenVPN
CNA base score9.8 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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02 Description

tap-windows6 driver version 9.26 and earlier does not properly check the size data of incomming write operations which an attacker can use to overflow memory buffers, resulting in a bug check and

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatableyesAn attacker can reliably automate reconnaissance through exploitation, so this scales.
  • Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
15.37% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 96.4% of scored records. A rank, not a probability.
NVD base score
9.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD analysis status
Analyzed. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2024-07-08 17:27Z2 YR AGO
Last updated
2024-08-23 03:55Z2 YR AGO
Reserved
2024-02-07
Assigning CNA
OpenVPN
Record state
PUBLISHED
Severity
Critical (CVSS 9.8)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses
  • CWE-190Integer Overflow or WraparoundBase
Data version
5.1
Document digest
2d31fa18d8720b3e6bd9427598eb80987ac1d03bdb1b250f4990477b1f43bfae

05 Affected products

VendorProductVersionsPlatforms
OpenVPNtap-windows69.26 or earlierWindows
OpenVPNOpenVPN-GUI2.6.9 and earlierWindows
openvpnopenvpn_gui0 to 2.6.9—
openvpntap_windows60 to 9.26—

06 References