How severe is CVE-2025-40836?

CVE-2025-40836 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-2025-40836 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-40836?

CVE-2025-40836 affects Ericsson Indoor Connect 8855 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-40836?

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-2025-40836 have an EU (EUVD) identifier?

Yes. CVE-2025-40836 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31099.

When was CVE-2025-40836 published?

CVE-2025-40836 was published on 2025-09-25 and last updated on 2026-06-17.

CVE-2025-40836

CVE-2025-40836 is a critical-severity vulnerability in Ericsson Indoor Connect 8855 Firmware 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-20.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v4: 8.7
EPSS exploit prediction: 0% (34th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-31099
Weakness: CWE-20
Affected product: Ericsson Indoor Connect 8855 Firmware
Published: 2025-09-25
Last modified: 2026-06-17

Description

Ericsson Indoor Connect 8855 contains an improper input validation vulnerability which if exploited can allow an attacker to execute commands with escalated privileges.

Frequently asked questions

What is CVE-2025-40836?: Ericsson Indoor Connect 8855 contains an improper input validation vulnerability which if exploited can allow an attacker to execute commands with escalated privileges.
How severe is CVE-2025-40836?: CVE-2025-40836 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-2025-40836 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (34th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-40836?: CVE-2025-40836 affects Ericsson Indoor Connect 8855 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-40836?: 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-2025-40836 have an EU (EUVD) identifier?: Yes. CVE-2025-40836 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-31099.
When was CVE-2025-40836 published?: CVE-2025-40836 was published on 2025-09-25 and last updated on 2026-06-17.

References

https://www.ericsson.com/en/about-us/security/psirt/e2025-09-25

Affected products (1)

cpe:2.3:o:ericsson:indoor_connect_8855_firmware:*:*:*:*:*:*:*:*

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