CVE-2026-121958
HIGH
MEDIUM
Priority: 0.03
BB Relevance:
67/100
Published: 2026-11-04
Modified: 2026-11-05
First seen: 2026-11-04
Status: active
Attack Surface
Network
Low Complexity
No Auth
Conf. Impact
Integ. Impact
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
Passive
S:
X
AT:
None
VC:
High
VI:
High
VA:
High
Description
FreeRDP through 3.32.1 has a heap out-of-bounds write in the RDPGFX client because the delete_surface callback truncates surface hash keys to 16 bits, leaving the surface table inconsistent so HashTable_GetKeys writes past its allocated key array. A malicious or man-in-the-middle RDP server can exploit this by creating surfaceId 0xFFFF, closing the RDPGFX channel, sending repeated DELETESURFACE PDUs, and then sending ENDFRAME or RESETGRAPHICS.
Weakness Classification (1)
Affected Software (3)
References & Advisories (2)
vendor-advisory
third-party-advisory