How severe is CVE-2025-43879?

CVE-2025-43879 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-2025-43879 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2025-43879?

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-2025-43879 have an EU (EUVD) identifier?

Yes. CVE-2025-43879 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18997.

When was CVE-2025-43879 published?

CVE-2025-43879 was published on 2025-06-24 and last updated on 2026-06-17.

CVE-2025-43879

CVE-2025-43879 is a critical-severity vulnerability 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-78.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 9.3
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-18997
Weakness: CWE-78
Published: 2025-06-24
Last modified: 2026-06-17

Description

WRH-733GBK and WRH-733GWH contain an improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability in the telnet function. If a remote unauthenticated attacker sends a specially crafted request to the affected product, an arbitrary OS command may be executed.

Frequently asked questions

What is CVE-2025-43879?: WRH-733GBK and WRH-733GWH contain an improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability in the telnet function. If a remote unauthenticated attacker sends a specially crafted request to the affected product, an arbitrary OS command may be executed.
How severe is CVE-2025-43879?: CVE-2025-43879 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-2025-43879 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2025-43879?: 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-2025-43879 have an EU (EUVD) identifier?: Yes. CVE-2025-43879 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-18997.
When was CVE-2025-43879 published?: CVE-2025-43879 was published on 2025-06-24 and last updated on 2026-06-17.

References

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