VDB-318708 · CVE-2025-21120 · dsa-2025-271

Dell Avamar Data Store Gen4T trusting http permission methods on the server side

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.9	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in Dell Avamar Data Store Gen4T, Avamar Data Store Gen5A, Avamar Virtual Edition for VMware ESXi and vSphere and Avamar Virtual Edition for VMware vSphere only. Impacted is an unknown function. The manipulation results in trusting http permission methods on the server side. This vulnerability was named CVE-2025-21120. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical has been found in Dell Avamar Data Store Gen4T, Avamar Data Store Gen5A, Avamar Virtual Edition for VMware ESXi and vSphere and Avamar Virtual Edition for VMware vSphere only (unknown version). Affected is an unknown code block. The manipulation with an unknown input leads to a trusting http permission methods on the server side vulnerability. CWE is classifying the issue as CWE-650. The server contains a protection mechanism that assumes that any URI that is accessed using HTTP GET will not cause a state change to the associated resource. This might allow attackers to bypass intended access restrictions and conduct resource modification and deletion attacks, since some applications allow GET to modify state. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Dell Avamar, versions prior to 19.10 SP1 with patch 338904, contains a Trusting HTTP Permission Methods on the Server-Side vulnerability in Security. A low privileged attacker with remote access could potentially exploit this vulnerability, leading to Information exposure.

The advisory is shared for download at dell.com. This vulnerability is traded as CVE-2025-21120 since 11/23/2024. The exploitability is told to be easy. It is possible to launch the attack remotely. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 02/26/2026).

Upgrading eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Virtualization Software

Vendor

Dell

Name

License

commercial

Website

Vendor: https://www.dell.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.9

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔒

CNA Base Score: 8.3
CNA Vector (dell): 🔒

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Trusting http permission methods on the server side
CWE: CWE-650
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

11/23/2024 CVE reserved
08/04/2025 +253 days Advisory disclosed
08/04/2025 +0 days VulDB entry created
02/26/2026 +206 days VulDB entry last update

Sourcesinfo

Vendor: dell.com

Advisory: dsa-2025-271
Status: Confirmed

CVE: CVE-2025-21120 (🔒)
GCVE (CVE): GCVE-0-2025-21120
GCVE (VulDB): GCVE-100-318708

Entryinfo

Created: 08/04/2025 21:43
Updated: 02/26/2026 11:13
Changes: 08/04/2025 21:43 (62), 02/17/2026 20:46 (2), 02/26/2026 11:13 (11)
Complete: 🔍
Cache ID: 216::103