Critical severity · published Jun 9, 2026
CVE-2025-10263
Arm C1-Ultra, C1-Premium, Neoverse V3 & V3AE, Neoverse V2, Neoverse V1, Neoverse-N2, Neoverse-N1, Cortex-X925, Cortex-X4, Cortex-X3, Cortex-X2, Cortex-X1 & X1C, Cortex-A710,…
9.1
CVSS
0.5%
EPSS
No
On KEV
Description
Arm C1-Ultra, C1-Premium, Neoverse V3 & V3AE, Neoverse V2, Neoverse V1, Neoverse-N2, Neoverse-N1, Cortex-X925, Cortex-X4, Cortex-X3, Cortex-X2, Cortex-X1 & X1C, Cortex-A710, Cortex-A78, A78AE & A78C, Cortex-A77, Cortex-A76 & A76A may allow writes to resources owned by a higher exception level.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
C1
C1-Premium · Arm
0 · source: vendor
C1
C1-Ultra · Arm
0 · source: vendor
CO
Cortex-A710 · Arm
0 · source: vendor
CO
Cortex-A76 · Arm
0 · source: vendor
CO
Cortex-A76AE · Arm
0 · source: vendor
CO
Cortex-A77 · Arm
0 · source: vendor
CO
Cortex-A78 · Arm
0 · source: vendor
CO
Cortex-A78AE · Arm
0 · source: vendor
CO
Cortex-A78C · Arm
0 · source: vendor
CO
Cortex-X1 · Arm
0 · source: vendor
CO
Cortex-X1C · Arm
0 · source: vendor
CO
Cortex-X2 · Arm
0 · source: vendor