Vulnary
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Critical· 9.1

CVE-2025-10263

This vulnerability allows an attacker to write to memory or resources that belong to a higher privilege level on a range of Arm processors. It can be triggered over the network without authentication or user interaction, potentially letting a malicious actor modify system data or code.

publishedJun 9, 2026
last modifiedAug 3, 2026
sourcesNVD
severity · cvss
9.1
critical · how bad it is
exploitation · epss
<1%
43th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Sep 5, 2026

No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.

01

Who is affected

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.

02

Real-world impact

An attacker could overwrite protected memory or configuration, potentially taking control of the device or corrupting its operation.

03

Why this severity

The CVSS score of 9.1 reflects that the flaw is network‑exposed, requires no authentication, and gives the attacker full confidentiality and integrity compromise. The low attack complexity and lack of user interaction make it highly dangerous.

04

What to do about it

no official fix yet

No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.

No fix documented in sources

05

Timeline

  1. Jun 9, 2026 · Jun 9, 2026
    Published
    Disclosed and added to the National Vulnerability Database.
  2. Aug 3, 2026 · 16h ago
    Advisory updated
    The NVD record was last revised.
06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactNone
07

References & advisories

(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →