CVE-2022-40494: NPS before v0.26.10 was discovered to contain an authentication bypass vulnerability via constantly generating

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2022-40494 is a critical-severity flaw (CVSS 9.8) affecting nps. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

NPS before v0.26.10 was discovered to contain an authentication bypass vulnerability via constantly generating and sending the Auth key and Timestamp parameters.

Why this priority

Critical severity
Public exploit reference
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	2.1% (top 18%)
CISA exploited list	No
Weakness	CWE-287
Published	2022-10-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ehang-io

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

Am I affected?

Timeline

2022-10-06 22:15 UTCPublished CVE record published
2026-06-17 05:01 UTCUpdated Record last modified

ehang-io nps UPGRADE

Affected: >= 0.19.0 and <= 0.26.10

Fixed in: newer than 0.26.10

Safe to downgrade to: a release before 0.19.0

1. Check installed version

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

2. UPGRADE to newer than 0.26.10 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nps

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 0.19.0 (Debian / Ubuntu)

apt-cache madison nps sudo apt install nps=<VERSION_BEFORE_0.19.0> sudo apt-mark hold nps

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

dnf --showduplicates list nps sudo dnf downgrade nps-<VERSION_BEFORE_0.19.0> sudo dnf versionlock add nps

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-2022-40494?

nps: upgrade to newer than 0.26.10. Exact commands for each OS are on this page.

Is CVE-2022-40494 being exploited?

CVE-2022-40494 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-2022-40494 affect?

CVE-2022-40494 affects nps. Severity is critical (CVSS 9.8). NPS before v0.26.10 was discovered to contain an authentication bypass vulnerability via constantly generating and sending the Auth key and Timestamp parameters.

How urgent is CVE-2022-40494?

Priority 65/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

← Back to latest CVEs