CVE-2026-15637: Improper authorization in the PAM SSH key and certificate retrieval endpoints in Devolutions Server 2026.2.11

Routine

HIGH 7.5REMOTEUPGRADE

CVE-2026-15637 is a high-severity flaw (CVSS 7.5) affecting devolutions server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Improper authorization in the PAM SSH key and certificate retrieval endpoints in Devolutions Server 2026.2.11, 2026.1.22 allows an authenticated low-privileged user to disclose the private key of an SSH key or certificate PAM credential via a direct object reference to the credential identifier.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 84%)
CISA exploited list	No
Weakness	CWE-639
Published	2026-07-14
Last modified	2026-10-24

Publisher (CNA): Devolutions Inc. · Vendor: devolutions

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-14 19:16 UTCPublished CVE record published
2026-10-24 21:10 UTCUpdated Record last modified

devolutions devolutions server UPGRADE

Affected: < 2026.1.23.0 · >= 2026.2.0.0 and < 2026.2.12.0

Fixed in: 2026.1.23.0, 2026.2.12.0

Safe to downgrade to: a release before 2026.2.0.0

1. Check installed version

apt-cache policy devolutions-server || rpm -q devolutions-server || devolutions-server --version

2. UPGRADE to 2026.1.23.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade devolutions-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade devolutions-server

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 2026.2.0.0 (Debian / Ubuntu)

apt-cache madison devolutions-server sudo apt install devolutions-server=<VERSION_BEFORE_2026.2.0.0> sudo apt-mark hold devolutions-server

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

dnf --showduplicates list devolutions-server sudo dnf downgrade devolutions-server-<VERSION_BEFORE_2026.2.0.0> sudo dnf versionlock add devolutions-server

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-2026-15637?

devolutions server: upgrade to 2026.1.23.0, 2026.2.12.0. Exact commands for each OS are on this page.

Is CVE-2026-15637 being exploited?

CVE-2026-15637 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-2026-15637 affect?

CVE-2026-15637 affects devolutions server. Severity is high (CVSS 7.5). Improper authorization in the PAM SSH key and certificate retrieval endpoints in Devolutions Server 2026.2.11, 2026.1.22 allows an authenticated low-privileged user to disclose the private key of an SSH key or certificate PAM credential

How urgent is CVE-2026-15637?

Priority 35/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

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CVE-2026-17568 HIGH 8.8 UPGRADE Improper access control in the role membership management endpoint in Devolutions Server allows an authenticat
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References

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