CVE-2025-65086: An Out-of-Bounds Write vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Sha

Q: How do I fix CVE-2025-65086?

argon: upgrade to newer than 12.6.1204.216; cobalt: upgrade to newer than 12.6.1204.216; cobalt share: upgrade to newer than 12.6.1204.216. Exact commands for each OS are on this page.

Q: Is CVE-2025-65086 being exploited?

CVE-2025-65086 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-2025-65086 affect?

CVE-2025-65086 affects argon, cobalt, cobalt share. Severity is high (CVSS 7.8). An Out-of-Bounds Write vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share versions 12.6.1204.216 and prior that could allow an attacker to execute arbitrary code when a specially crafted VC6 file is be

Routine

HIGH 7.8UPGRADEUPGRADEUPGRADE

CVE-2025-65086 is a high-severity flaw (CVSS 7.8) affecting argon, cobalt, cobalt share. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An Out-of-Bounds Write vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share versions 12.6.1204.216 and prior that could allow an attacker to execute arbitrary code when a specially crafted VC6 file is being parsed.

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.2% (top 94%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-05-12
Last modified	2026-10-14

Publisher (CNA): ICS-CERT · Vendor: ashlar

Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-12 21:16 UTCPublished CVE record published
2026-10-14 13:10 UTCUpdated Record last modified

ashlar argon UPGRADE

Affected: <= 12.6.1204.216

Fixed in: newer than 12.6.1204.216

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 12.6.1204.216 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade argon

Note

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

ashlar cobalt UPGRADE

Affected: <= 12.6.1204.216

Fixed in: newer than 12.6.1204.216

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 12.6.1204.216 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cobalt

Note

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

ashlar cobalt share UPGRADE

Affected: <= 12.6.1204.216

Fixed in: newer than 12.6.1204.216

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy cobalt-share || rpm -q cobalt-share || cobalt-share --version

2. UPGRADE to newer than 12.6.1204.216 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade cobalt-share

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade cobalt-share

Note

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

ashlar lithium UPGRADE

Affected: <= 12.6.1204.216

Fixed in: newer than 12.6.1204.216

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 12.6.1204.216 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade lithium

Note

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

ashlar xenon UPGRADE

Affected: <= 12.6.1204.216

Fixed in: newer than 12.6.1204.216

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to newer than 12.6.1204.216 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade xenon

Note

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

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-2025-65086?

argon: upgrade to newer than 12.6.1204.216; cobalt: upgrade to newer than 12.6.1204.216; cobalt share: upgrade to newer than 12.6.1204.216. Exact commands for each OS are on this page.

Is CVE-2025-65086 being exploited?

CVE-2025-65086 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-2025-65086 affect?

CVE-2025-65086 affects argon, cobalt, cobalt share. Severity is high (CVSS 7.8). An Out-of-Bounds Write vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Share versions 12.6.1204.216 and prior that could allow an attacker to execute arbitrary code when a specially crafted VC6 file is be

How urgent is CVE-2025-65086?

Priority 29/100. High severity

Related CVEs

CVE-2025-65087 HIGH 7.8 UPGRADE UPGRADE An Out-of-Bounds Read vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Shar
CVE-2025-65088 HIGH 7.8 UPGRADE UPGRADE An Out-of-Bounds Read vulnerability is present in Ashlar-Vellum Cobalt, Xenon, Argon, Lithium, and Cobalt Shar

References

← Back to latest CVEs