CVE-2026-27653: The installers for multiple products provided by Soliton Systems K.K

Routine

MEDIUM 6.7DOWNGRADEUPGRADEUPGRADE

CVE-2026-27653 is a medium-severity flaw (CVSS 6.7) affecting securebrowser for onegate, securebrowser ii, secureworkspace. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The installers for multiple products provided by Soliton Systems K.K. contain an issue with incorrect default permissions, which may allow arbitrary code to be executed with SYSTEM privileges.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.7 (Medium)
Attack vector	Local
Attack complexity	High
Privileges needed	Low
User interaction	Required
EPSS exploit chance	0.1% (top 99%)
CISA exploited list	No
Weakness	CWE-276, CWE-863
Published	2026-02-27
Last modified	2026-06-17

Publisher (CNA): JPCERT/CC · Vendor: soliton

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-02-27 06:17 UTCPublished CVE record published
2026-06-17 10:27 UTCUpdated Record last modified

soliton securebrowser for onegate DOWNGRADE

Affected: 1.0.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.0.0

1. Check installed version

apt-cache policy securebrowser-for-onegate || rpm -q securebrowser-for-onegate || securebrowser-for-onegate --version

2. No fixed release: DOWNGRADE to a release before 1.0.0 (Debian / Ubuntu)

apt-cache madison securebrowser-for-onegate sudo apt install securebrowser-for-onegate=<VERSION_BEFORE_1.0.0> sudo apt-mark hold securebrowser-for-onegate

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list securebrowser-for-onegate sudo dnf downgrade securebrowser-for-onegate-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add securebrowser-for-onegate

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

soliton securebrowser ii UPGRADE

Affected: >= 2.0.0 and < 2.0.15

Fixed in: 2.0.15

Safe to downgrade to: a release before 2.0.0

1. Check installed version

apt-cache policy securebrowser-ii || rpm -q securebrowser-ii || securebrowser-ii --version

2. UPGRADE to 2.0.15 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade securebrowser-ii

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade securebrowser-ii

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 2.0.0 (Debian / Ubuntu)

apt-cache madison securebrowser-ii sudo apt install securebrowser-ii=<VERSION_BEFORE_2.0.0> sudo apt-mark hold securebrowser-ii

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list securebrowser-ii sudo dnf downgrade securebrowser-ii-<VERSION_BEFORE_2.0.0> sudo dnf versionlock add securebrowser-ii

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

soliton secureworkspace UPGRADE

Affected: >= 1.0.0 and < 1.4.8

Fixed in: 1.4.8

Safe to downgrade to: a release before 1.0.0

1. Check installed version

apt-cache policy secureworkspace || rpm -q secureworkspace || secureworkspace --version

2. UPGRADE to 1.4.8 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade secureworkspace

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade secureworkspace

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.0.0 (Debian / Ubuntu)

apt-cache madison secureworkspace sudo apt install secureworkspace=<VERSION_BEFORE_1.0.0> sudo apt-mark hold secureworkspace

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list secureworkspace sudo dnf downgrade secureworkspace-<VERSION_BEFORE_1.0.0> sudo dnf versionlock add secureworkspace

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-27653?

securebrowser for onegate: downgrade or apply the listed mitigation; securebrowser ii: upgrade to 2.0.15; secureworkspace: upgrade to 1.4.8. Exact commands for each OS are on this page.

Is CVE-2026-27653 being exploited?

CVE-2026-27653 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-27653 affect?

CVE-2026-27653 affects securebrowser for onegate, securebrowser ii, secureworkspace. Severity is medium (CVSS 6.7). The installers for multiple products provided by Soliton Systems K.K. contain an issue with incorrect default permissions, which may allow arbitrary code to be executed with SYSTEM privileges.

How urgent is CVE-2026-27653?

Priority 24/100. No elevated risk signals yet.

References

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