How severe is CVE-2015-7923?

CVE-2015-7923 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2015-7923 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2015-7923?

CVE-2015-7923 affects Westermo Weos. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2015-7923?

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.

When was CVE-2015-7923 published?

CVE-2015-7923 was published on 2016-01-30 and last updated on 2026-06-17.

CVE-2015-7923

CVE-2015-7923 is a critical-severity vulnerability in Westermo Weos with a CVSS 3.x base score of 9.0. 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-310.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
CVSS v2: 9.3
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-310
Affected product: Westermo Weos
Published: 2016-01-30
Last modified: 2026-06-17

Description

Westermo WeOS before 4.19.0 uses the same SSL private key across different customers' installations, which makes it easier for man-in-the-middle attackers to defeat cryptographic protection mechanisms by leveraging knowledge of a key.

Frequently asked questions

What is CVE-2015-7923?: Westermo WeOS before 4.19.0 uses the same SSL private key across different customers' installations, which makes it easier for man-in-the-middle attackers to defeat cryptographic protection mechanisms by leveraging knowledge of a key.
How severe is CVE-2015-7923?: CVE-2015-7923 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2015-7923 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2015-7923?: CVE-2015-7923 affects Westermo Weos. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2015-7923?: 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.
When was CVE-2015-7923 published?: CVE-2015-7923 was published on 2016-01-30 and last updated on 2026-06-17.

References

https://ics-cert.us-cert.gov/advisories/ICSA-16-028-01

Affected products (1)

cpe:2.3:o:westermo:weos:4.18.0:*:*:*:*:*:*:*

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