How severe is CVE-2025-6273?

CVE-2025-6273 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2025-6273 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-6273?

CVE-2025-6273 affects Webassembly Wabt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-6273?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-6273 have an EU (EUVD) identifier?

Yes. CVE-2025-6273 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18694.

When was CVE-2025-6273 published?

CVE-2025-6273 was published on 2025-06-19 and last updated on 2026-06-17.

CVE-2025-6273

CVE-2025-6273 is a low-severity vulnerability in Webassembly Wabt with a CVSS 3.x base score of 3.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-617.

Key facts

Severity: Low (CVSS 3.x base score 3.3)
CVSS v2: 1.7
CVSS v4: 1.9
EPSS exploit prediction: 0% (9th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-18694
Weakness: CWE-617
Affected product: Webassembly Wabt
Published: 2025-06-19
Last modified: 2026-06-17

Description

A vulnerability was found in WebAssembly wabt up to 1.0.37 and classified as problematic. This issue affects the function LogOpcode of the file src/binary-reader-objdump.cc. The manipulation leads to reachable assertion. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The code maintainer explains that this issue might not affect "real world wasm programs".

Frequently asked questions

What is CVE-2025-6273?: A vulnerability was found in WebAssembly wabt up to 1.0.37 and classified as problematic. This issue affects the function LogOpcode of the file src/binary-reader-objdump.cc. The manipulation leads to reachable assertion. Local access is required to approach this attack. The exploit has been disclosed to the public and may be used. The real existence of this vulnerability is still doubted at the moment. The code maintainer explains that this issue might not affect "real world wasm programs".
How severe is CVE-2025-6273?: CVE-2025-6273 has a CVSS 3.x base score of 3.3, rated low severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2025-6273 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (9th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-6273?: CVE-2025-6273 affects Webassembly Wabt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-6273?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-6273 have an EU (EUVD) identifier?: Yes. CVE-2025-6273 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18694.
When was CVE-2025-6273 published?: CVE-2025-6273 was published on 2025-06-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:webassembly:wabt:*:*:*:*:*:*:*:*

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