How severe is CVE-2018-15426?

CVE-2018-15426 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2018-15426 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-15426?

CVE-2018-15426 affects Cisco Unity Connection. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-15426?

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

When was CVE-2018-15426 published?

CVE-2018-15426 was published on 2018-10-05 and last updated on 2026-06-17.

CVE-2018-15426

CVE-2018-15426 is a medium-severity vulnerability in Cisco Unity Connection with a CVSS 3.x base score of 4.8. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 4.8)
CVSS v2: 3.5
EPSS exploit prediction: 1% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Cisco Unity Connection
Published: 2018-10-05
Last modified: 2026-06-17

Description

A vulnerability in the web-based interface of Cisco Unity Connection could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the web-based interface of the affected software. The vulnerability is due to insufficient validation of user-supplied input that is processed by the web-based interface of the affected software. An attacker could exploit this vulnerability by persuading a user of the web-based interface to click a malicious link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the interface or access sensitive, browser-based information.

Frequently asked questions

What is CVE-2018-15426?: A vulnerability in the web-based interface of Cisco Unity Connection could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the web-based interface of the affected software. The vulnerability is due to insufficient validation of user-supplied input that is processed by the web-based interface of the affected software. An attacker could exploit this vulnerability by persuading a user of the web-based interface to click a malicious link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the interface or access sensitive, browser-based information.
How severe is CVE-2018-15426?: CVE-2018-15426 has a CVSS 3.x base score of 4.8, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2018-15426 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-15426?: CVE-2018-15426 affects Cisco Unity Connection. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-15426?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-15426 published?: CVE-2018-15426 was published on 2018-10-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:cisco:unity_connection:vmo-11.5\(1\):*:*:*:*:*:*:*

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