CVE-2026-4396

Traffic interception via disabled certificate verification

Published Mar 18, 2026 · Updated Mar 18, 2026

Improper certificate validation in Devolutions Hub Reporting Service 2025.3.1.1 and earlier allows man-in-the-middle attackers to intercept traffic. The Reporting Service disables TLS certificate verification when establishing outbound connections, accepting an attacker's certificate instead of authenticating the peer. Exploitation requires attackers to occupy an adjacent network position and permits interception or modification of protected communications.

CVSS severity7.6
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Improper certificate validation in Devolutions Hub Reporting Service 2025.3.1.1 and earlier allows man-in-the-middle attackers to intercept traffic. The Reporting Service disables TLS certificate verification when establishing outbound connections, accepting an attacker's certificate instead of authenticating the peer. Exploitation requires attackers to occupy an adjacent network position and permits interception or modification of protected communications.

The record

CVE
CVE-2026-4396
Published
Mar 18, 2026
Updated
Mar 18, 2026
Vendor
Ironman Software
Product
Devolutions Hub Reporting Service
Classifications
CWE-295, T1557
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <=2025.3.1.1

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

Ironman Software · Devolutions Hub Reporting Serviceversion=0 <=2025.3.1.1

Published CVSS scores

7.6Devolutions Inc.CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
8.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
8.3CISA-ADPCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-295Improper Certificate Validation
T1557Adversary-in-the-Middle

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo