CVE-2025-43853

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.5 under NVD CVSS v3. EPSS exploit probability: 0.1%, top 70% 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
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0

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

The WebAssembly Micro Runtime's (WAMR) iwasm package is the executable binary built with WAMR VMcore which supports WebAssembly System Interface (WASI) and command line interface. Anyone running WAMR up to and including version 2.2.0 or WAMR built with libc-uvwasi on Windows is affected by a symlink following vulnerability. On WAMR running in Windows, creating a symlink pointing outside of the preopened directory and subsequently opening it with create flag will create a file on host outside of the sandbox. If the symlink points to an existing host file, it's also possible to open it and read its content. Version 2.3.0 fixes the issue.

CVSS v3
5.5
EG Score
5.5(medium)
EPSS
15.3%
KEV
Not listed

Published

May 15, 2025

Last Modified

September 19, 2025

References (2)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 49× 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.

  1. 2026-07-22 14:07 UTCEPSS rescore
  2. 2026-07-22 14:07 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
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Show 67 more
  1. 2026-07-07 01:21 UTCOSV refresh
  2. 2026-07-06 16:27 UTCEPSS rescore
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  4. 2026-07-06 02:23 UTCEPSS rescore
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  8. 2026-07-02 17:01 UTCEPSS rescore
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  18. 2026-06-27 03:08 UTCEPSS rescore
  19. 2026-06-25 13:49 UTCEPSS rescore
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  21. 2026-06-24 14:04 UTCEPSS rescore
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  23. 2026-06-23 21:32 UTCEPSS rescore
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  35. 2026-06-18 12:35 UTCOSV refresh
  36. 2026-06-17 17:52 UTCEPSS rescore
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  40. 2026-06-15 17:48 UTCEPSS rescore
  41. 2026-06-14 23:17 UTCEPSS rescore
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  43. 2026-06-12 23:11 UTCEPSS rescore
  44. 2026-06-11 14:00 UTCEPSS rescore
  45. 2026-06-11 14:00 UTCEPSS rescore
  46. 2026-06-10 22:18 UTCEPSS rescore
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  48. 2026-06-10 13:22 UTCEPSS rescore
  49. 2026-06-08 14:16 UTCEPSS rescore
  50. 2026-06-08 14:16 UTCEPSS rescore
  51. 2026-06-07 15:24 UTCEPSS rescore
  52. 2026-06-06 13:47 UTCEPSS rescore
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  54. 2026-06-05 22:46 UTCEPSS rescore
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  65. 2026-05-31 00:16 UTCEPSS rescore
  66. 2026-05-30 05:25 UTCEG score recompute
  67. 2026-05-29 13:44 UTCEPSS rescore

Frequently asked(5)

What is CVE-2025-43853?
CVE-2025-43853 is a medium vulnerability published on May 15, 2025. The WebAssembly Micro Runtime's (WAMR) iwasm package is the executable binary built with WAMR VMcore which supports WebAssembly System Interface (WASI) and command line interface. Anyone running WAMR up to and including version 2.2.0 or WAMR built with libc-uvwasi on Windows is affected by a…
When was CVE-2025-43853 disclosed?
CVE-2025-43853 was first published in the National Vulnerability Database on May 15, 2025, with the most recent update on September 19, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-43853 actively exploited?
CVE-2025-43853 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-43853?
CVE-2025-43853 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2025-43853?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-43853, 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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