CVE-2026-20463
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedIn Modem, there is a possible escalation of privilege due to a permissions bypass. This could lead to local escalation of privilege if a malicious actor has already obtained the System privilege. User interaction is not needed for exploitation. Patch ID: MOLY01716533; Issue ID: MSV-6309.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceIn the Modem component, a permissions bypass allows a local attacker with System privilege to further escalate privileges. The vulnerability permits unauthorized access to privileged operations within the modem, enabling escalation beyond the initially obtained System-level access. No user interaction is required for exploitation.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- High
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify modem component in your environmentLocate the modem firmware, modem module, or modem-related processes/services in your system. Check system inventory, firmware directories, or hardware listings for Modem, Baseband, or cellular modem components.Affected if A modem component is present and the firmware version is earlier than MOLY01716533 or cannot be determined
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Retrieve the modem firmware versionAccess the modem firmware version through vendor-specific commands (such as AT+CGMR for cellular modems, or via firmware dump/bootloader), or check system configuration files that expose modem version information.Affected if The installed modem firmware version is below MOLY01716533 or is unpatched
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Verify permission policy configurationReview modem permission policy files or configuration settings that control privilege separation. Check for any custom or hardened permission policies that may have been applied to the modem component.Affected if The modem permission policies are in default or unhardened configuration, allowing the documented bypass to function
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Check for System-level access exposureAudit accounts, processes, or services that hold System-level privileges on the device. Determine if any untrusted actors could obtain System access to the modem component.Affected if System-level privileges exist in the modem context and permission boundaries are not properly enforced
Your environment is affected if a modem component is present with firmware version earlier than MOLY01716533 and the permission policies allow the documented privilege escalation bypass.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataApply the vendor patch (MOLY01716533) to the modem firmware. Review and harden modem permission policies to ensure proper privilege separation and prevent bypass of access controls.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $6,176.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-20463 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-20463 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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