CVE-2025-66216: AIS-catcher is a multi-platform AIS receiver

Q: How do I fix CVE-2025-66216?

ais-catcher: upgrade to 0.64. Exact commands for each OS are on this page.

Q: Is CVE-2025-66216 being exploited?

CVE-2025-66216 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2025-66216 affect?

CVE-2025-66216 affects ais-catcher. Severity is critical (CVSS 9.8). AIS-catcher is a multi-platform AIS receiver. Prior to version 0.64, a heap buffer overflow vulnerability has been identified in the AIS::Message class of AIS-catcher. This vulnerability allows an attacker to write approximately 1KB of arbi

Q: How urgent is CVE-2025-66216?

Priority 58/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2025-66216 is a critical-severity flaw (CVSS 9.8) affecting ais-catcher. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

AIS-catcher is a multi-platform AIS receiver. Prior to version 0.64, a heap buffer overflow vulnerability has been identified in the AIS::Message class of AIS-catcher. This vulnerability allows an attacker to write approximately 1KB of arbitrary data into a 128-byte buffer. This issue has been patched in version 0.64.

Why this priority

Critical severity
Public exploit reference
CISA SSVC: automatable with total technical impact
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 57%)
CISA exploited list	No
Weakness	CWE-131, CWE-787
Published	2025-11-29
Last modified	2026-10-07

Publisher (CNA): GitHub, Inc. · Vendor: aiscatcher

Last updated 2026-10-07 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2025-11-29 03:15 UTCPublished CVE record published
2026-10-07 20:10 UTCUpdated Record last modified

aiscatcher ais-catcher UPGRADE

Affected: < 0.64

Fixed in: 0.64

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ais-catcher || rpm -q ais-catcher || ais-catcher --version

2. UPGRADE to 0.64 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ais-catcher

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ais-catcher

Note

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

Exact fixes by distribution

Fedora ELN · jgmenu · FIXED · 4.7.0-1.eln159 · FEDORA-2026-40fa69cb49 · source

sudo dnf upgrade --advisory=FEDORA-2026-40fa69cb49

Fedora 46 · trustedqsl · FIXED · 2.8.7-1.fc46 · FEDORA-2026-6b1bc90ebc · source

sudo dnf upgrade --advisory=FEDORA-2026-6b1bc90ebc

Public exploits and detection

Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.

Write-up: github.com/jvde-github/AIS-catcher/security/advisories/GHSA-v53x-f5hh-g2g6

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-2025-66216?

ais-catcher: upgrade to 0.64. Exact commands for each OS are on this page.

Is CVE-2025-66216 being exploited?

CVE-2025-66216 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-2025-66216 affect?

CVE-2025-66216 affects ais-catcher. Severity is critical (CVSS 9.8). AIS-catcher is a multi-platform AIS receiver. Prior to version 0.64, a heap buffer overflow vulnerability has been identified in the AIS::Message class of AIS-catcher. This vulnerability allows an attacker to write approximately 1KB of arbi

How urgent is CVE-2025-66216?

Priority 58/100. Critical severity; Public exploit reference; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

Related CVEs

CVE-2025-66217 HIGH 7.5 UPGRADE AIS-catcher is a multi-platform AIS receiver

References

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