CVE-2025-46658: An issue was discovered in ExonautWeb in 4C Strategies Exonaut 21.6

This month

CRITICAL 9.8REMOTEDOWNGRADE

CVE-2025-46658 is a critical-severity flaw (CVSS 9.8) affecting exonaut. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An issue was discovered in ExonautWeb in 4C Strategies Exonaut 21.6. There are verbose error messages.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 67%)
CISA exploited list	No
Weakness	CWE-209
Published	2025-08-05
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: 4cstrategies

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

Am I affected?

Timeline

2025-08-05 16:15 UTCPublished CVE record published
2026-06-17 09:26 UTCUpdated Record last modified

4cstrategies exonaut DOWNGRADE

Affected: 21.6

Fixed in: no fixed release known

Safe to downgrade to: a release before 21.6

1. Check installed version

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

2. No fixed release: DOWNGRADE to a release before 21.6 (Debian / Ubuntu)

apt-cache madison exonaut sudo apt install exonaut=<VERSION_BEFORE_21.6> sudo apt-mark hold exonaut

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

dnf --showduplicates list exonaut sudo dnf downgrade exonaut-<VERSION_BEFORE_21.6> sudo dnf versionlock add exonaut

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-2025-46658?

exonaut: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-46658 being exploited?

CVE-2025-46658 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-2025-46658 affect?

CVE-2025-46658 affects exonaut. Severity is critical (CVSS 9.8). An issue was discovered in ExonautWeb in 4C Strategies Exonaut 21.6. There are verbose error messages.

How urgent is CVE-2025-46658?

Priority 48/100. Critical severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2024-55402 MEDIUM 5.3 UPGRADE 4C Strategies Exonaut before v22.4 was discovered to contain an access control issue.
CVE-2024-55401 MEDIUM 6.5 UPGRADE An issue in 4C Strategies Exonaut before v22.4 allows attackers to execute a directory traversal.
CVE-2024-55399 MEDIUM 6.5 UPGRADE 4C Strategies Exonaut before v21.6.2.1-1 was discovered to contain a Server-Side Request Forgery (SSRF).
CVE-2024-55398 MEDIUM 6.5 UPGRADE 4C Strategies Exonaut before v22.4 was discovered to contain insecure permissions.
CVE-2025-46660 MEDIUM 5.3 DOWNGRADE An issue was discovered in 4C Strategies Exonaut 21.6

References

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