CVE-2025-64097: NervesHub is a web service that allows users to manage over-the-air (OTA) firmware updates of devices in the f

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CRITICAL 9.8REMOTEUPGRADE

CVE-2025-64097 is a critical-severity flaw (CVSS 9.8) affecting nerveshub. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

NervesHub is a web service that allows users to manage over-the-air (OTA) firmware updates of devices in the field. A vulnerability present starting in version 1.0.0 and prior to version 2.3.0 allowed attackers to brute-force user API tokens due to the predictable format of previously issued tokens. Tokens included user-identifiable components and were not cryptographically secure, making them susceptible to guessing or enumeration. The vulnerabi

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 60%)
CISA exploited list	No
Weakness	CWE-330
Published	2026-01-22
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: nerves-hub

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

Am I affected?

Timeline

2026-01-22 15:16 UTCPublished CVE record published
2026-06-17 09:53 UTCUpdated Record last modified

nerves-hub nerveshub UPGRADE

Affected: >= 1.0.0 and < 2.3.0

Fixed in: 2.3.0

Safe to downgrade to: a release before 1.0.0

1. Check installed version

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

2. UPGRADE to 2.3.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nerveshub

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 nerveshub sudo apt install nerveshub=<VERSION_BEFORE_1.0.0> sudo apt-mark hold nerveshub

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

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

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-2025-64097?

nerveshub: upgrade to 2.3.0. Exact commands for each OS are on this page.

Is CVE-2025-64097 being exploited?

CVE-2025-64097 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-2025-64097 affect?

CVE-2025-64097 affects nerveshub. Severity is critical (CVSS 9.8). NervesHub is a web service that allows users to manage over-the-air (OTA) firmware updates of devices in the field. A vulnerability present starting in version 1.0.0 and prior to version 2.3.0 allowed attackers to brute-force user API token

How urgent is CVE-2025-64097?

Priority 49/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-28806 HIGH 8.8 UPGRADE Improper Authorization vulnerability in nerves-hub nerves_hub_web allows cross-organization device control via

References

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