How severe is CVE-2021-28485?

CVE-2021-28485 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2021-28485 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28485?

CVE-2021-28485 affects Ericsson Mobile Switching Center Server Bc 18a Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28485?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-28485 published?

CVE-2021-28485 was published on 2023-09-14 and last updated on 2026-06-17.

CVE-2021-28485

CVE-2021-28485 is a medium-severity vulnerability in Ericsson Mobile Switching Center Server Bc 18a Firmware with a CVSS 3.x base score of 4.3. 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-22.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
EPSS exploit prediction: 1% (42nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-22
Affected product: Ericsson Mobile Switching Center Server Bc 18a Firmware
Published: 2023-09-14
Last modified: 2026-06-17

Description

In Ericsson Mobile Switching Center Server (MSC-S) before IS 3.1 CP22, the SIS web application allows relative path traversal via a specific parameter in the https request after authentication, which allows access to files on the system that are not intended to be accessible via the web application.

Frequently asked questions

What is CVE-2021-28485?: In Ericsson Mobile Switching Center Server (MSC-S) before IS 3.1 CP22, the SIS web application allows relative path traversal via a specific parameter in the https request after authentication, which allows access to files on the system that are not intended to be accessible via the web application.
How severe is CVE-2021-28485?: CVE-2021-28485 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2021-28485 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (42nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28485?: CVE-2021-28485 affects Ericsson Mobile Switching Center Server Bc 18a Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28485?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-28485 published?: CVE-2021-28485 was published on 2023-09-14 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:ericsson:mobile_switching_center_server_bc_18a_firmware:*:*:*:*:*:*:*:*

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