CVE-2021-25653
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 · uneditedA privilege escalation vulnerability was discovered in Avaya Aura Appliance Virtualization Platform Utilities (AVPU) that may potentially allow a local user to escalate privileges. Affects 8.0.0.0 through 8.1.3.1 versions of AVPU.
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 confidenceLocal privilege escalation vulnerability in Avaya Aura Appliance Virtualization Platform Utilities (AVPU) allows a local authenticated user to gain elevated privileges. The vulnerability affects versions 8.0.0.0 through 8.1.3.1 and requires local access to the system.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data>= 8.0.0.0, <= 8.1.3.1CVSS 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
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:L/AC:L/PR:L/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 installed AVPU versionUse the system management interface or run the product's version command (e.g., 'avpu --version' or check the about/status panel in the Avaya administration console) to determine the exact version number of Avaya Aura Virtualization Platform UtilitiesAffected if The installed version falls within 8.0.0.0 through 8.1.3.1 inclusive
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Confirm local user access existsVerify whether local user accounts are enabled on the system by checking /etc/passwd (Linux) or local user management console (Windows), or by attempting to establish a local authenticated sessionAffected if Local authenticated users can log in to the system (even with limited privileges)
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Check for untrusted local usersReview the list of local user accounts and their privilege levels using 'localusers' or the system user management tool. Identify any accounts that should not have elevated accessAffected if There are non-administrative local user accounts present on the system
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Verify AVPU service is runningCheck if the Avaya Aura Virtualization Platform Utilities service is active using 'systemctl status avpu' or equivalent service management command for your platformAffected if The AVPU service is running and the version is within the affected range
A system is affected if it runs Avaya Aura Virtualization Platform Utilities version 8.0.0.0 through 8.1.3.1 and allows local user authentication, as the privilege escalation requires a local authenticated user to exploit.
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 dataUpgrade AVPU to a version beyond 8.1.3.1 once a patched release is available, or implement strict access controls to limit local user privileges until the update can be applied.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2021-25653 — 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-2021-25653 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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