How severe is CVE-2025-48057?

CVE-2025-48057 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2025-48057 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-48057?

CVE-2025-48057 affects Icinga. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-48057?

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-2025-48057 have an EU (EUVD) identifier?

Yes. CVE-2025-48057 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-28141.

When was CVE-2025-48057 published?

CVE-2025-48057 was published on 2025-05-27 and last updated on 2026-06-17.

CVE-2025-48057

CVE-2025-48057 is a critical-severity vulnerability in Icinga with a CVSS 3.x base score of 9.8. 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-296.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-28141
Weakness: CWE-296
Affected product: Icinga
Published: 2025-05-27
Last modified: 2026-06-17

Description

Icinga 2 is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. Prior to versions 2.12.12, 2.13.12, and 2.14.6, the VerifyCertificate() function can be tricked into incorrectly treating certificates as valid. This allows an attacker to send a malicious certificate request that is then treated as a renewal of an already existing certificate, resulting in the attacker obtaining a valid certificate that can be used to impersonate trusted nodes. This only occurs when Icinga 2 is built with OpenSSL older than version 1.1.0. This issue has been patched in versions 2.12.12, 2.13.12, and 2.14.6.

Frequently asked questions

What is CVE-2025-48057?: Icinga 2 is a monitoring system which checks the availability of network resources, notifies users of outages, and generates performance data for reporting. Prior to versions 2.12.12, 2.13.12, and 2.14.6, the VerifyCertificate() function can be tricked into incorrectly treating certificates as valid. This allows an attacker to send a malicious certificate request that is then treated as a renewal of an already existing certificate, resulting in the attacker obtaining a valid certificate that can be used to impersonate trusted nodes. This only occurs when Icinga 2 is built with OpenSSL older than version 1.1.0. This issue has been patched in versions 2.12.12, 2.13.12, and 2.14.6.
How severe is CVE-2025-48057?: CVE-2025-48057 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2025-48057 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-48057?: CVE-2025-48057 affects Icinga. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-48057?: 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-2025-48057 have an EU (EUVD) identifier?: Yes. CVE-2025-48057 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-28141.
When was CVE-2025-48057 published?: CVE-2025-48057 was published on 2025-05-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:icinga:icinga:*:*:*:*:*:*:*:*

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