CVE-2026-85425: MOOS-IvP iSay through 24.8.1 contains a remote code execution vulnerability in the SAY_MOOS variable handler t

Q: How do I fix CVE-2026-85425?

moos-ivp: upgrade to newer than 24.8.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-85425 being exploited?

CVE-2026-85425 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-2026-85425 affect?

CVE-2026-85425 affects moos-ivp. Severity is critical (CVSS 9.8). MOOS-IvP iSay through 24.8.1 contains a remote code execution vulnerability in the SAY_MOOS variable handler that passes unsanitized text to a shell command. Attackers can publish SAY_MOOS messages containing backticks or command substituti

Q: How urgent is CVE-2026-85425?

Priority 62/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

This week

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-85425 is a critical-severity flaw (CVSS 9.8) affecting moos-ivp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MOOS-IvP iSay through 24.8.1 contains a remote code execution vulnerability in the SAY_MOOS variable handler that passes unsanitized text to a shell command. Attackers can publish SAY_MOOS messages containing backticks or command substitution syntax to execute arbitrary commands as the iSay process user.

Why this priority

Critical severity
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	1.8% (top 22%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-09-03
Last modified	2026-10-14

Publisher (CNA): VulnCheck · Vendor: mit

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

Am I affected?

Timeline

2026-09-03 23:17 UTCPublished CVE record published
2026-10-14 15:09 UTCUpdated Record last modified

mit moos-ivp UPGRADE

Affected: <= 24.8.1

Fixed in: newer than 24.8.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy moos-ivp || rpm -q moos-ivp || moos-ivp --version

2. UPGRADE to newer than 24.8.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade moos-ivp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade moos-ivp

Note

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

Exact fixes by distribution

Fedora 46 · ddnet · FIXED · 20.2-1.fc46 · FEDORA-2026-6991b4ab14 · source

sudo dnf upgrade --advisory=FEDORA-2026-6991b4ab14

Fedora ELN · libplacebo · FIXED · 7.360.1-5.eln159 · FEDORA-2026-92226f221e · source

sudo dnf upgrade --advisory=FEDORA-2026-92226f221e

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-2026-85425?

moos-ivp: upgrade to newer than 24.8.1. Exact commands for each OS are on this page.

Is CVE-2026-85425 being exploited?

CVE-2026-85425 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-2026-85425 affect?

CVE-2026-85425 affects moos-ivp. Severity is critical (CVSS 9.8). MOOS-IvP iSay through 24.8.1 contains a remote code execution vulnerability in the SAY_MOOS variable handler that passes unsanitized text to a shell command. Attackers can publish SAY_MOOS messages containing backticks or command substituti

How urgent is CVE-2026-85425?

Priority 62/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

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References

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