How severe is CVE-2019-11355?

CVE-2019-11355 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-11355 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-11355?

CVE-2019-11355 affects Polycom Hdx System Software. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2019-11355?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2019-11355 published?

CVE-2019-11355 was published on 2020-03-12 and last updated on 2026-06-17.

CVE-2019-11355

CVE-2019-11355 is a high-severity vulnerability in Polycom Hdx System Software with a CVSS 3.x base score of 7.2. 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: High (CVSS 3.x base score 7.2)
CVSS v2: 9.0
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Polycom Hdx System Software
Published: 2020-03-12
Last modified: 2026-06-17

Description

An issue was discovered in Poly (formerly Polycom) HDX 3.1.13. A feature exists that allows the creation of a server / client certificate, or the upload of the user certificate, on the administrator's page. The value received from the user is the factor value of a shell script on the equipment. By entering a special character (such as a single quote) in a CN or other CSR field, one can insert a command into a factor value. A system command can be executed as root.

Frequently asked questions

What is CVE-2019-11355?: An issue was discovered in Poly (formerly Polycom) HDX 3.1.13. A feature exists that allows the creation of a server / client certificate, or the upload of the user certificate, on the administrator's page. The value received from the user is the factor value of a shell script on the equipment. By entering a special character (such as a single quote) in a CN or other CSR field, one can insert a command into a factor value. A system command can be executed as root.
How severe is CVE-2019-11355?: CVE-2019-11355 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-11355 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (61st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-11355?: CVE-2019-11355 affects Polycom Hdx System Software. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2019-11355?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2019-11355 published?: CVE-2019-11355 was published on 2020-03-12 and last updated on 2026-06-17.

References

https://support.polycom.com/content/dam/polycom-support/global/documentation/hdx-3-1-14-advisory.pdf

Affected products (1)

cpe:2.3:a:polycom:hdx_system_software:*:*:*:*:*:*:*:*

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