How severe is CVE-2025-61739?

CVE-2025-61739 has a CVSS 4.0 base score of 7.2, rated high severity.

Is CVE-2025-61739 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-61739?

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

Does CVE-2025-61739 have an EU (EUVD) identifier?

Yes. CVE-2025-61739 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204703.

When was CVE-2025-61739 published?

CVE-2025-61739 was published on 2025-12-22 and last updated on 2026-06-17.

CVE-2025-61739

CVE-2025-61739 is a high-severity vulnerability with a CVSS 4.0 base score of 7.2. 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-323.

Key facts

Severity: High (CVSS 4.0 base score 7.2)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-204703
Weakness: CWE-323
Published: 2025-12-22
Last modified: 2026-06-17

Description

Due to Nonce reuse, attackers can perform reply attack or decrypt captured packets.

Frequently asked questions

What is CVE-2025-61739?: Due to Nonce reuse, attackers can perform reply attack or decrypt captured packets.
How severe is CVE-2025-61739?: CVE-2025-61739 has a CVSS 4.0 base score of 7.2, rated high severity.
Is CVE-2025-61739 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-61739?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-61739 have an EU (EUVD) identifier?: Yes. CVE-2025-61739 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-204703.
When was CVE-2025-61739 published?: CVE-2025-61739 was published on 2025-12-22 and last updated on 2026-06-17.

References

Other CWE-323 vulnerabilities

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CVE-2026-49952 — Critical (CVSS 9.1): Discuz! X5.0 releases 20260320 through 20260501 contains an authentication bypass vulnerability that allows…
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CVE-2025-47345 — High (CVSS 8.4): Cryptographic issue may occur while encrypting license data.
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