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CVE-2021-25650

INDEX BUILT · 2026-09-20

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Avaya Aura Utility Services Privilege Escalation Vulnerability

CVE-2021-256504 of 4 sources documented this
24

rank 24 = 0 + 22 + 0 + 2 + 0

rank@v1 · backlog

Someone is already using it

CISA KEV catalog · public proof-of-concept · FIRST EPSS

EPSS 0.00511  ·  without this subject the record ranks 24

What it costs you if it fires

NVD CVSS base score, then the CNA's own

CVSS 8.8, from NVD  ·  without this subject the record ranks 2

It is getting worse, not staying still

FIRST EPSS series, rescorings and bad loads removed

no persisting rise in 365 days  ·  without this subject the record ranks 24

How much of the world it touches

NVD CPE configurations

1 product in the CPE ranges  ·  without this subject the record ranks 22

Someone else already set the date

CISA KEV remediation due date

no CISA due date  ·  without this subject the record ranks 24

Unaudited dollar value2 of 3 inputs carry a receipt
Exposure$22,500over the next 30 days, if this record is yours
Movementno material movementthe record holds only daily drift and scoring model releases
Basisassumeda published average, not your estate

$22,500 = $4.99M incident cost x 0.8814887365328109 exposure x 0.00511 likelihood

udv@v1 · unaudited · wrong for you until you say what you run

$4.99M is the cost of a breach that happened, from IBM Cost of a Data Breach Report 2026, global average. It is not the value of any asset of yours. That average already covers breaches of every severity, so scaling it by exposure understates a partial-impact record. That is an assumption, not a measurement. Your own asset value goes in the decision record.

Hindsight · the state

0.00511EPSSNOT IN KEVas of 2026-09-20
Severity7.7 HIGHreceipt
Harmpartial impactreceipt
Exploitationnone in held sources
Defenseno fix version held
Movementscoring model changedreceipt
PLATEAU10Minimal movement since 2021-06-24, 1817 days at 0.01, as of 2026-06-15. arc-rules@v1

Foresight · where to check next

VMware vCenterSonicWall SMA100025650

This record is one instance of CWE-250, execution with unnecessary privileges. The index holds 368 prior instances of this class, 2 KEV-listed. The nearest of its KEV-listed records are drawn beside this. taxonomy@v1

Full pattern panel

Prior records in this weakness class. Each is its own record, dated and receipted.
Color is a claim, not decoration:the hostile worldthe defenseno signalspoke length is how much of the record matches, not how bad it is

Sources disagree here.

Severity score
Avaya7.7 HIGHreceipt
NVD8.8 HIGHreceipt
What it costs
AvayaComplete confidentiality and integrity loss, with impact beyond the vulnerable componentreceipt
NVDComplete confidentiality, integrity and availability loss, with impact beyond the vulnerable componentreceipt

Both shown, dated. We don't pick winners. disagreement-rules@v1

Running Avaya Aura Utility Services? Check your version

A deterministic range check against the ranges this record publishes. It tells you where a version sits in the record, not whether your deployment is exploitable. No account needed.

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Harm, if it fires from the vector and the weakness

Written for the ticket you're about to file.

Reachnetwork-reachable · high privileges required · no user interaction · high attack complexityreceipt
ImpactComplete confidentiality and integrity loss, with impact beyond the vulnerable componentreceipt
Scored fromCVSS v3.1 · the CNA's vectorreceipt
Weakness classCWE-250 Execution with Unnecessary Privilegesreceipt
Published consequencesCWE-250: Confidentiality, Integrity, Availability, Access Control: Gain Privileges or Assume Identity, Execute Unauthorized Code or Commands, Read Application Data, DoS: Crash, Exit, or Restart[email protected]

CISA KEV & Federal Remediation Deadline from the record and CISA

The fix, and how long it's been waiting.

Fixed inNo fix version in held sources, as the index stood on 15 Jun 2026.
Patch available sinceNo dated patch-availability record in held sources. The index holds reference URLs without dates and only the current revision of the CVE record, so the day a fix first existed cannot be derived. Only the versions it landed in.

Exploit Status & Known PoCs a ladder, not a score

Current rung: Nothing observed in held sources.

  • RUNG 1Nothing observed in held sources
  • RUNG 2Proof-of-concept published
  • RUNG 3Exploited in the wild · CISA KEV listed
  • RUNG 4Ransomware campaign use known

Authority who says so

CVSS, the CNA7.7 HIGHreceipt
CVSS, NVD8.8 HIGHreceipt
Exploit probability0.00511 · top 57% of all CVEsreceipt
Blast breadth1 product across 1 vendorderived
Assigned byavayareceipt
Recorded changes15 · last 19 Sep 2026derived

Affected & Fixed Versions as published

Affected productAvaya Aura Utility Servicesreceipt
Published rangesavaya aura utility services >= 7.0 <= 7.1.3receipt

A rung lights from a row in the index, never from an assessment. "Held sources" is the true scope of the claim: this index reads the CVE record, NVD, CISA KEV, FIRST's EPSS and public proof-of-concept repositories, and it does not observe attacks.

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Attack path

Network requestrequires high privilegesAvaya Aura Utility ServicesCWE-250 weaknessAdjacent componentsscope changeConfidentiality and integrity lossC:H / I:Hexploits CWE-250scope changedata compromise

What it is stated by the CNA

A privilege escalation vulnerability was discovered in Avaya Aura Utility Services that may potentially allow a local user to execute specially crafted scripts as a privileged user. Affects all 7.x versions of Avaya Aura Utility Services receipt

NVD's analysis a second authority

severity
8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
weakness
CWE-250; CWE-269
affected versions
avaya aura utility services >= 7.0 <= 7.1.3
also scored by
[email protected] 7.7 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N

The CNA scored it 7.7 and NVD 8.8. Both are shown because both were published; we do not pick one.

check it yourself support.avaya.com receipt

Movement the material steps

24 Jun 20210.00221
7 Mar 20234.2e-4 · scoring model v2023.03.01
17 Mar 20250.0006 · scoring model v2025.03.14
15 Jun 20260.00511 · scoring model v2026.06.15
Show all 15 observations
24 Jun 20210.00221
6 Jan 20220.00985
4 Feb 20220.01404
1 Apr 20220.00885
7 Mar 20234.2e-4
8 Mar 20230.00042
17 Mar 20250.0006
19 Mar 20250.00068
29 Mar 20250.00053
30 Mar 20250.00068
8 Sep 20250.00209
11 Sep 20250.00225
18 Nov 20250.00121
21 Nov 20250.00225
15 Jun 20260.00511

15 observations held. A highlighted step crossed a promotion threshold. A step marked with a scoring model moved because the instrument was replaced, not because the vulnerability changed. receipt

The full biography

EPSS 0.00511Published2021-06-24Index as of2026-06-15

The record had been public for 4 years, 11 months when this index was last written.

Published 2021-06-24 receipt · Index as of 2026-06-15 derived

The pattern, elsewhere

This record is one instance of CWE-250, execution with unnecessary privileges. The index holds 368 prior instances of this class, 2 KEV-listed. The nearest of its KEV-listed records are drawn beside this. [email protected]

CVE-2024-38813 · VMware vCenter Servermatches 5 of 10KEV listed · 2024receipt
CVE-2025-40602 · SonicWall SMA1000only 2 attributes comparableKEV listed · 2025receipt

"Matches n of m" counts the attributes the two records can both be compared on: the CVSS metrics they share a version of, any weakness class beyond this one, and the vendor. fit-rules@v1

368 records in this class held. The six above are drawn from the ones CISA has listed as exploited, ranked by how much of the record matches this one. That is why every one of them is KEV-listed: the pool is, so the colour on those spokes says nothing the pool has not already said.

No curated product neighbourhood is held for this product, so the records above are the nearest this index can name. The neighbourhood table covers a small set of products and is extended by hand.

Siblings and hubs

Records related to this one

Its defect family

avaya aura utility services

Of the 3 records in this advisory that state one, this holds the highest NVD CVSS score: 8.8.

Grouped by shared product and weakness, not by shared vulnerability. Each record's own state is on its own page.

Family membership: held values

This record is one of a group, and the group's page describes all of them. This page is kept and dated, and the defect family's own page is the one we offer for indexing: the whole group.

Browse the index from here

These are index-wide views, not findings about CVE-2021-25650.

What usually comes next

Everything above needs no account. What is below is work: assembling it, scoping it to your estate, watching it, and handing it to someone else.

Everything on this page is free. Public data. Withholding it protects nothing.