How severe is CVE-2025-54426?

CVE-2025-54426 has a CVSS 4.0 base score of 9.9, rated critical severity.

Is CVE-2025-54426 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-54426?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2025-54426 have an EU (EUVD) identifier?

Yes. CVE-2025-54426 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22944.

When was CVE-2025-54426 published?

CVE-2025-54426 was published on 2025-07-28 and last updated on 2026-06-17.

CVE-2025-54426

CVE-2025-54426 is a critical-severity vulnerability with a CVSS 4.0 base score of 9.9. 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-327.

Key facts

Severity: Critical (CVSS 4.0 base score 9.9)
EPSS exploit prediction: 0% (23rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-22944
Weakness: CWE-327
Published: 2025-07-28
Last modified: 2026-06-17

Description

Polkadot Frontier is an Ethereum and EVM compatibility layer for Polkadot and Substrate. In versions prior to commit 36f70d1, the Curve25519Add and Curve25519ScalarMul precompiles incorrectly handle invalid Ristretto point representations. Instead of returning an error, they silently treat invalid input bytes as the Ristretto identity element, leading to potentially incorrect cryptographic results. This is fixed in commit 36f70d1.

Frequently asked questions

What is CVE-2025-54426?: Polkadot Frontier is an Ethereum and EVM compatibility layer for Polkadot and Substrate. In versions prior to commit 36f70d1, the Curve25519Add and Curve25519ScalarMul precompiles incorrectly handle invalid Ristretto point representations. Instead of returning an error, they silently treat invalid input bytes as the Ristretto identity element, leading to potentially incorrect cryptographic results. This is fixed in commit 36f70d1.
How severe is CVE-2025-54426?: CVE-2025-54426 has a CVSS 4.0 base score of 9.9, rated critical severity.
Is CVE-2025-54426 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (23rd percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-54426?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2025-54426 have an EU (EUVD) identifier?: Yes. CVE-2025-54426 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-22944.
When was CVE-2025-54426 published?: CVE-2025-54426 was published on 2025-07-28 and last updated on 2026-06-17.

References

Other CWE-327 (Use of a Broken or Risky Cryptographic Algorithm) vulnerabilities

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CVE-2024-51478 — Critical (CVSS 9.9): YesWiki is a wiki system written in PHP. Prior to 4.4.5, the use of a weak cryptographic algorithm and a hard-coded…
CVE-2026-28252 — Critical (CVSS 9.8): A Use of a Broken or Risky Cryptographic Algorithm vulnerability in Trane Tracer SC, Tracer SC+, and Tracer Concierge…
CVE-2025-13476 — Critical (CVSS 9.8): Rakuten Viber Cloak mode in Android v25.7.2.0g and Windows v25.6.0.0–v25.8.1.0 uses a static and predictable TLS…
CVE-2025-69929 — Critical (CVSS 9.8): An issue in N3uron Web User Interface v.1.21.7-240207.1047 allows a remote attacker to escalate privileges via the…

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