CVE-2026-1842Network attack vector

Prolonged unauthorized access via refresh-token acceptance

Published Feb 20, 2026 · Updated Feb 20, 2026

Improper session management in SoftIron HyperCloud 2.3.5 through 2.6.8 allows remote authenticated users to retain resource access. The Manifold REST API accepts long-lived refresh tokens as authorization tokens and does not invalidate previously issued access tokens when refreshing a session. Possession of a disclosed token is required; a refresh token remains usable for its default one-year lifetime, while older access tokens can continue concurrent access.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper session management in SoftIron HyperCloud 2.3.5 through 2.6.8 allows remote authenticated users to retain resource access. The Manifold REST API accepts long-lived refresh tokens as authorization tokens and does not invalidate previously issued access tokens when refreshing a session. Possession of a disclosed token is required; a refresh token remains usable for its default one-year lifetime, while older access tokens can continue concurrent access.

The record

CVE
CVE-2026-1842
Published
Feb 20, 2026
Updated
Feb 20, 2026
Vendor
SoftIron
Product
HyperCloud
Classifications
CWE-613, CAPEC-593, T1550.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 20, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=2.3.5 <2.6.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SoftIron · HyperCloudversion=2.3.5 <2.6.9

Published CVSS scores

6.2SoftIronCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-613Insufficient Session Expiration
CAPEC-593Session Hijacking
T1550.001Application Access Token

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

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Your stack

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