CVE-2026-85426: MOOS-IvP uMemWatch through 24.8.1 constructs shell commands from attacker-chosen MOOS client names without san

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CRITICAL 9.8REMOTE

CVE-2026-85426 is a critical-severity flaw (CVSS 9.8) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MOOS-IvP uMemWatch through 24.8.1 constructs shell commands from attacker-chosen MOOS client names without sanitization. Attackers can inject shell metacharacters into client names to execute arbitrary commands as the uMemWatch process user through unquoted redirection targets in system calls.

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	0.9% (top 40%)
CISA exploited list	No
Weakness	CWE-78
Published	2026-09-03
Last modified	2026-09-08

Publisher (CNA): VulnCheck

Last updated 2026-09-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

2026-09-03 23:17 UTCPublished CVE record published
2026-09-08 20:07 UTCUpdated Record last modified

Exact fixes by distribution

Fedora ELN · fonttools · FIXED · 4.68.0-1.eln159 · FEDORA-2026-37fa4b964c · source

sudo dnf upgrade --advisory=FEDORA-2026-37fa4b964c

Fedora 46 · fonttools · FIXED · 4.68.0-1.fc46 · FEDORA-2026-65d6c01c75 · source

sudo dnf upgrade --advisory=FEDORA-2026-65d6c01c75

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-2026-85426?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-85426 being exploited?

CVE-2026-85426 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-2026-85426 affect?

CVE-2026-85426 affects affected software. Severity is critical (CVSS 9.8). MOOS-IvP uMemWatch through 24.8.1 constructs shell commands from attacker-chosen MOOS client names without sanitization. Attackers can inject shell metacharacters into client names to execute arbitrary commands as the uMemWatch process user

How urgent is CVE-2026-85426?

Priority 57/100. Critical severity; CISA SSVC: automatable with total technical impact; Remotely exploitable, no login, no user action

References

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