Security readout for executives and security teams
Plain-English summary
CVE-2021-25652 can expose sensitive Avaya Aura AVPU system functionality and configuration information to users who should not have it. The business risk is unauthorized visibility into infrastructure details, not direct system takeover. Scope appears limited to specific AVPU 8.0.0.0 through 8.1.3.1 deployments.
Executive priority
Prioritize remediation during normal vulnerability management, faster for telecom or call-center systems with broad administrator access. The main concern is disclosure of configuration details that could support later attacks.
Technical view
The issue is a CWE-200 information disclosure flaw in AVPU directory and file management. Sources describe unintended access to privileged functionality and configuration information. CVSS 3.1 is 4.9 with high confidentiality impact, no integrity or availability impact, and high privileges required.
Likely exposure
Organizations using Avaya Aura Appliance Virtualization Platform Utilities versions 8.0.0.0 through 8.1.3.1 are potentially exposed. Exposure is most relevant where non-privileged or over-broad local user access exists on AVPU-managed systems.
Exploitation context
The provided bundle does not show CISA KEV listing, active exploitation, or public exploit evidence. Treat this as a controlled-access confidentiality weakness requiring authenticated or local access context, based on the description and CVSS privileges requirement.
Researcher notes
Evidence is limited to official CVE data and the Avaya advisory reference. The description mentions local users, while the CVSS vector lists network attack vector and high privileges required; preserve that ambiguity when assessing exploitability.
Mitigation direction
- Review Avaya advisory 101076479 for fixed versions and vendor remediation instructions.
- Inventory AVPU deployments and flag versions 8.0.0.0 through 8.1.3.1.
- Restrict AVPU system access to users with a clear operational need.
- Review local account assignments and remove unnecessary access.
- Monitor vendor guidance before making architecture or configuration assumptions.
Validation and detection
- Confirm whether Avaya Aura AVPU is deployed in the environment.
- Record installed AVPU versions and compare against 8.0.0.0 through 8.1.3.1.
- Review user and group permissions on AVPU-managed hosts.
- Check whether vendor-recommended remediation from Avaya advisory 101076479 is applied.
- Document any exposed configuration data and affected business services.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2021-25652 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 4.9 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N1.23.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
4.9MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://support.avaya.com/css/P8/documents/101076479CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.