CVE-2026-77178CWE-787

CVE-2026-77178

Critical · published October 6, 2026

CVSS v3.1
9.1
EPSS
0%
Percentile
26.1
In the wild
Unconfirmed
What it is

Oracle VM VirtualBox before 7.2.8 allows guest OS users to cause an out-of-bounds write in the host OS in pcnetReceiveNoSync in DevPCNet.cpp in the PCNet (Am79C970A) network device model.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00339 · 26.1th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-10-06T18:17Z
References (3)
https://gist.github.com/entropy1337/cd0d5b368445d20c43aca2590b313892 · [email protected]https://www.oracle.com/ · [email protected]https://www.virtualbox.org/wiki/Download_Old_Builds_7_0 · [email protected]
EPSS history
Timeline
  • 08 OCT 03:32Z
    EPSS moved — → 0%
    epss
  • 06 OCT 00:00Z
    Oracle VM VirtualBox before 7.2.8 allows guest OS users to cause an out-of-bounds write in the host OS in pcnetReceiveNoSync in DevPCNet.cpp in the PCNet…
    cvelistv5