How severe is CVE-2019-1839?

CVE-2019-1839 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2019-1839 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2019-1839?

CVE-2019-1839 primarily affects Cisco Remote Phy 120 Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2019-1839?

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

When was CVE-2019-1839 published?

CVE-2019-1839 was published on 2019-08-21 and last updated on 2026-06-17.

CVE-2019-1839

CVE-2019-1839 is a medium-severity vulnerability in Cisco Remote Phy 120 Firmware with a CVSS 3.x base score of 6.7. 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: Medium (CVSS 3.x base score 6.7)
CVSS v2: 7.2
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Cisco Remote Phy 120 Firmware
Published: 2019-08-21
Last modified: 2026-06-17

Description

A vulnerability in Cisco Remote PHY Device Software could allow an authenticated, local attacker to execute commands on the underlying Linux shell of an affected device with root privileges. The vulnerability occurs because the affected software improperly sanitizes user-supplied input. An attacker who has valid administrator access to an affected device could exploit this vulnerability by supplying various CLI commands with crafted arguments. A successful exploit could allow the attacker to run arbitrary commands as the root user, allowing complete compromise of the system.

Frequently asked questions

What is CVE-2019-1839?: A vulnerability in Cisco Remote PHY Device Software could allow an authenticated, local attacker to execute commands on the underlying Linux shell of an affected device with root privileges. The vulnerability occurs because the affected software improperly sanitizes user-supplied input. An attacker who has valid administrator access to an affected device could exploit this vulnerability by supplying various CLI commands with crafted arguments. A successful exploit could allow the attacker to run arbitrary commands as the root user, allowing complete compromise of the system.
How severe is CVE-2019-1839?: CVE-2019-1839 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2019-1839 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2019-1839?: CVE-2019-1839 primarily affects Cisco Remote Phy 120 Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-1839?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2019-1839 published?: CVE-2019-1839 was published on 2019-08-21 and last updated on 2026-06-17.

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190821-rphy

Affected products (6)

cpe:2.3:o:cisco:remote_phy_120_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:remote_phy_220_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:remote_phy_shelf_7200_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:cisco:cbr-8_firmware:1.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:cbr-8_firmware:6.1:*:*:*:*:*:*:*
cpe:2.3:o:cisco:cbr-8_firmware:6.2:*:*:*:*:*:*:*

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