Enter Software Iperius Backup up to 8.7.3 NTLM2 information disclosure

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 (≈)
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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.
2.3$0-$5k0.17

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Enter Software Iperius Backup up to 8.7.3. Affected by this issue is some unknown functionality of the component NTLM2 Handler. The manipulation leads to information disclosure. This vulnerability is listed as CVE-2026-4823. The attack must be carried out locally. In addition, an exploit is available. It is advisable to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Detailsinfo

A vulnerability was found in Enter Software Iperius Backup up to 8.7.3. It has been rated as problematic. This issue affects an unknown functionality of the component NTLM2 Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. Using CWE to declare the problem leads to CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. Impacted is confidentiality.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-4823. The exploitation is known to be difficult. Attacking locally is a requirement. Technical details are unknown but a public exploit is available. The attack technique deployed by this issue is T1592 according to MITRE ATT&CK.

The exploit is available at github.com. It is declared as proof-of-concept. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Upgrading to version 8.7.4 eliminates this vulnerability. The upgrade is hosted for download at iperiusbackup.com.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-16005). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 2.5
VulDB Meta Temp Score: 2.3

VulDB Base Score: 2.5
VulDB Temp Score: 2.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Iperius Backup 8.7.4

Timelineinfo

03/25/2026 Advisory disclosed
03/25/2026 +0 days VulDB entry created
03/26/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-4823 (🔒)
GCVE (CVE): GCVE-0-2026-4823
GCVE (VulDB): GCVE-100-353123
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/25/2026 15:01
Updated: 03/26/2026 00:58
Changes: 03/25/2026 15:01 (59), 03/26/2026 00:58 (1)
Complete: 🔍
Submitter: 0truust
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #774218: Enter Software Iperius Backup <= 8.7.2 Authentication Bypass by Capture-replay (by 0truust)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion

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