CVE-2026-45322

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 1.7%, top 25% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Elevated
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 7.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Microsoft UFO open-source framework for intelligent automation across devices and platforms. Microsoft UFO tagged releases up to and including v3.0.0 contain an OS command injection vulnerability in the shell action replay path. In affected releases, ShellReceiver.run_shell() passes a command string from action parameters directly to subprocess.Popen() with shell=True and executable=powershell.exe. The same shell-execution behavior is also reachable through ShellReceiver.execute_command(). The shell receiver is invoked by action classes such as RunShellCommand.execute() and ExecuteCommand.execute(), which forward stored action parameters to the shell receiver. Because UFO stores planned and executed actions in per-session JSON records, an attacker who can write or modify a session/action JSON file can plant a shell action. When the session is resumed or replayed, UFO executes the attacker's command as the UFO process user.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
74.9%
KEV
Not listed

Published

May 27, 2026

Last Modified

May 28, 2026

Advisory Details (1)

Auto-updated May 28, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

OS Command Injection in Microsoft UFO Shell Action Replay via Stored Session JSON · Advisory · microsoft/UFO · GitHub

https://github.com/microsoft/UFO/security/advisories/GHSA-wj72-7w8h-695f

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 7× in last 7d / 48× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 107 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
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  3. 2026-07-13 22:30 UTCEPSS rescore
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  1. 2026-06-28 04:56 UTCEPSS rescore
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  26. 2026-06-15 17:49 UTCEPSS rescore
  27. 2026-06-15 13:16 UTCEG score recompute
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  30. 2026-06-13 23:00 UTCEPSS rescore
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  40. 2026-06-10 22:18 UTCEPSS rescore
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  45. 2026-06-09 15:15 UTCEG score recompute
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  73. 2026-06-01 13:52 UTCEPSS rescore
  74. 2026-06-01 13:52 UTCEPSS rescore
  75. 2026-06-01 01:19 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-45322?
CVE-2026-45322 is a high vulnerability published on May 27, 2026. Microsoft UFO open-source framework for intelligent automation across devices and platforms. Microsoft UFO tagged releases up to and including v3.0.0 contain an OS command injection vulnerability in the shell action replay path. In affected releases, ShellReceiver.runshell() passes a command string…
When was CVE-2026-45322 disclosed?
CVE-2026-45322 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on May 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45322 actively exploited?
CVE-2026-45322 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 74.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45322?
CVE-2026-45322 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-45322?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45322, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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