VDB-355201 · CVE-2026-28767 · icsa-26-055-03

Gardyn Cloud API up to 2.12.2025 Administrative Endpoint missing authentication

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.
5.2	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Gardyn Cloud API up to 2.12.2025. It has been rated as critical. Affected by this vulnerability is an unknown functionality of the component Administrative Endpoint. This manipulation causes missing authentication. This vulnerability is handled as CVE-2026-28767. The attack can be initiated remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Gardyn Cloud API up to 2.12.2025. It has been declared as critical. Affected by this vulnerability is an unknown function of the component Administrative Endpoint. The manipulation with an unknown input leads to a missing authentication vulnerability. The CWE definition for the vulnerability is CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. As an impact it is known to affect confidentiality. The summary by CVE is:

A specific administrative endpoint notifications is accessible without proper authentication.

The weakness was released by Michael Groberman as icsa-26-055-03. The advisory is shared at cisa.gov. This vulnerability is known as CVE-2026-28767 since 03/17/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

Upgrading to version 2.12.2026 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-18841). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Cloud Software

Vendor

Gardyn

Name

Cloud API

Version

2.12.2025

CPE 2.3info

🔒

CPE 2.2info

🔒

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector (icscert): 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing authentication
CWE: CWE-306 / CWE-287
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: 🔒

Upgrade: Cloud API 2.12.2026

Timelineinfo

03/17/2026 CVE reserved
04/03/2026 +16 days Advisory disclosed
04/03/2026 +0 days VulDB entry created
04/04/2026 +1 days VulDB entry last update

Sourcesinfo

Advisory: icsa-26-055-03
Researcher: Michael Groberman
Status: Confirmed

CVE: CVE-2026-28767 (🔒)
GCVE (CVE): GCVE-0-2026-28767
GCVE (VulDB): GCVE-100-355201
EUVD: 🔒

Entryinfo

Created: 04/03/2026 23:24
Updated: 04/04/2026 02:37
Changes: 04/03/2026 23:24 (79), 04/04/2026 02:37 (1)
Complete: 🔍
Cache ID: 216:9B2:103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.