PT-2026-3703 · Oracle+1 · Virtualbox+1

Gangnam Kim + 2 · CVE-2026-21955 · Published 2026-01-01 · Updated 2026-07-16

Positive Technologies (AI Summary)

CVSS v3.1

8.2

High

Base vector

AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Oracle VM VirtualBox versions 7.1.14 and 7.2.4

Description An easily exploitable issue exists in the Oracle VM VirtualBox Core component, potentially allowing a high-privileged attacker with access to the system where Oracle VM VirtualBox runs to compromise the software. Successful exploitation can lead to a takeover of Oracle VM VirtualBox, and may significantly impact additional products.

Recommendations Update Oracle VM VirtualBox version 7.1.14 to a later version. Update Oracle VM VirtualBox version 7.2.4 to a later version.

Exploit

Fix

DoS

LPE

RCE

Resource Exhaustion

Weakness Enumeration

CWE-20

CWE-400

Related Identifiers

BDU:2026-00844

CVE-2026-21955

ZDI-26-098

Affected Products

Virtualbox

Red Os

References · 21

• 🔥 https://github.com/minq0x1412/CVE-2026-21955 · Exploit
• https://zerodayinitiative.com/advisories/ZDI-26-098 · Security Note
• https://ubuntu.com/security/CVE-2026-21955 · Vendor Advisory
• https://oracle.com/security-alerts/cpujan2026.html · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-21955 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-21955 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-21955 · Security Note
• https://osv.dev/vulnerability/CVE-2026-21955 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-00844 · Security Note
• https://twitter.com/ptdbugs/status/2077707837510185239 · Twitter Post
• https://redos.red-soft.ru/search/?iblock_id=24&q=CVE-2026-21955 · Note
• https://twitter.com/CVEnew/status/2013783003823251779 · Twitter Post
• https://redos.red-soft.ru/support/secure/uyazvimosti/support/secure/uyazvimosti-red-os-8-0/uyazvimost-virtualbox-guest-additions-cve-2026-21955-8.0 · Note
• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-21955 · Note
• https://twitter.com/ptdbugs/status/2077712875104129174 · Twitter Post