CVE-2026-44194

CRITICALNVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.1 under NVD CVSS v3. EPSS exploit probability: 6.4%, top 7% 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
9.1
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 6%CVSS: 9.1Exploit: NoneExposed: 0

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

OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.8, an authenticated Remote Code Execution (RCE) vulnerability in the OPNsense core allows a user with user-management privileges to execute arbitrary system commands as root. An attacker can bypass input validation by formatting their malicious payload as a compliant email address, allowing shell commands to reach the underlying operating system. The flaw exists in the local user synchronization flow, within core/src/opnsense/scripts/auth/sync_user.php. This vulnerability is fixed in 26.1.8.

CVSS v3
9.1
EG Score
9.1(medium)
EPSS
92.9%
KEV
Not listed

Published

May 13, 2026

Last Modified

May 15, 2026

Advisory Details (1)

Auto-updated May 13, 2026
🔬 Proof of concept available. Patch available. Sources: github.
github Patch Available🟡 PoC Available

RCE on user managment · Advisory · opnsense/core · GitHub

https://github.com/opnsense/core/security/advisories/GHSA-f59w-m967-9rf6

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 7× in last 7d / 44× 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 166 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 02:00 UTCEPSS rescore
  3. 2026-07-13 22:30 UTCEPSS rescore
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  16. 2026-06-29 22:09 UTCEG score recompute
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  1. 2026-06-26 20:27 UTCEG score recompute
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  5. 2026-06-25 13:49 UTCEPSS rescore
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  14. 2026-06-17 20:37 UTCEG score recompute
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  19. 2026-06-16 17:52 UTCEPSS rescore
  20. 2026-06-16 11:24 UTCEG score recompute
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  23. 2026-06-15 17:49 UTCEPSS rescore
  24. 2026-06-15 05:44 UTCEG score recompute
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  26. 2026-06-14 21:39 UTCEG score recompute
  27. 2026-06-14 17:37 UTCEG score recompute
  28. 2026-06-14 13:33 UTCEG score recompute
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  36. 2026-06-12 23:12 UTCEPSS rescore
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  38. 2026-06-12 21:22 UTCEG score recompute
  39. 2026-06-12 17:16 UTCEG score recompute
  40. 2026-06-12 13:13 UTCEG score recompute
  41. 2026-06-12 09:02 UTCEG score recompute
  42. 2026-06-12 04:57 UTCEG score recompute
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  44. 2026-06-11 20:53 UTCEG score recompute
  45. 2026-06-11 16:51 UTCEG score recompute
  46. 2026-06-11 14:00 UTCEPSS rescore
  47. 2026-06-11 12:30 UTCEG score recompute
  48. 2026-06-11 08:28 UTCEG score recompute
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  50. 2026-06-11 00:22 UTCEG score recompute
  51. 2026-06-10 22:18 UTCEPSS rescore
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  53. 2026-06-10 16:18 UTCEG score recompute
  54. 2026-06-10 13:22 UTCEPSS rescore
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  56. 2026-06-10 12:17 UTCEG score recompute
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  60. 2026-06-09 20:08 UTCEG score recompute
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  65. 2026-06-08 23:59 UTCEG score recompute
  66. 2026-06-08 19:57 UTCEG score recompute
  67. 2026-06-08 14:17 UTCEPSS rescore
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  69. 2026-06-08 11:26 UTCEG score recompute
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  72. 2026-06-07 23:20 UTCEG score recompute
  73. 2026-06-07 19:18 UTCEG score recompute
  74. 2026-06-07 15:25 UTCEPSS rescore
  75. 2026-06-07 15:25 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-44194?
CVE-2026-44194 is a critical vulnerability published on May 13, 2026. OPNsense is a FreeBSD based firewall and routing platform. Prior to 26.1.8, an authenticated Remote Code Execution (RCE) vulnerability in the OPNsense core allows a user with user-management privileges to execute arbitrary system commands as root. An attacker can bypass input validation by…
When was CVE-2026-44194 disclosed?
CVE-2026-44194 was first published in the National Vulnerability Database on May 13, 2026, with the most recent update on May 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-44194 actively exploited?
CVE-2026-44194 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 92.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-44194?
CVE-2026-44194 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-44194?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-44194, 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.

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