How severe is CVE-2025-14957?

CVE-2025-14957 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-2025-14957 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-14957?

CVE-2025-14957 affects Webassembly Binaryen. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-14957?

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

Does CVE-2025-14957 have an EU (EUVD) identifier?

Yes. CVE-2025-14957 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204582.

When was CVE-2025-14957 published?

CVE-2025-14957 was published on 2025-12-19 and last updated on 2026-06-17.

CVE-2025-14957

CVE-2025-14957 is a low-severity vulnerability in Webassembly Binaryen 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-476.

Key facts

Severity: Low (CVSS 3.x base score 3.3)
CVSS v2: 1.7
CVSS v4: 1.9
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-204582
Weakness: CWE-476
Affected product: Webassembly Binaryen
Published: 2025-12-19
Last modified: 2026-06-17

Description

A vulnerability was identified in WebAssembly Binaryen up to 125. This affects the function IRBuilder::makeLocalGet/IRBuilder::makeLocalSet/IRBuilder::makeLocalTee of the file src/wasm/wasm-ir-builder.cpp of the component IRBuilder. Such manipulation of the argument Index leads to null pointer dereference. Local access is required to approach this attack. The exploit is publicly available and might be used. The name of the patch is 6fb2b917a79578ab44cf3b900a6da4c27251e0d4. Applying a patch is advised to resolve this issue.

Frequently asked questions

What is CVE-2025-14957?: A vulnerability was identified in WebAssembly Binaryen up to 125. This affects the function IRBuilder::makeLocalGet/IRBuilder::makeLocalSet/IRBuilder::makeLocalTee of the file src/wasm/wasm-ir-builder.cpp of the component IRBuilder. Such manipulation of the argument Index leads to null pointer dereference. Local access is required to approach this attack. The exploit is publicly available and might be used. The name of the patch is 6fb2b917a79578ab44cf3b900a6da4c27251e0d4. Applying a patch is advised to resolve this issue.
How severe is CVE-2025-14957?: CVE-2025-14957 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-2025-14957 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-14957?: CVE-2025-14957 affects Webassembly Binaryen. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-14957?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-14957 have an EU (EUVD) identifier?: Yes. CVE-2025-14957 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204582.
When was CVE-2025-14957 published?: CVE-2025-14957 was published on 2025-12-19 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:webassembly:binaryen:*:*:*:*:*:*:*:*

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