How severe is CVE-2020-8797?

CVE-2020-8797 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-2020-8797 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8797?

CVE-2020-8797 affects Juplink Rx4-1500 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-8797?

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

When was CVE-2020-8797 published?

CVE-2020-8797 was published on 2020-04-23 and last updated on 2026-06-17.

CVE-2020-8797

CVE-2020-8797 is a medium-severity vulnerability in Juplink Rx4-1500 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: 6.9
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-78
Affected product: Juplink Rx4-1500 Firmware
Published: 2020-04-23
Last modified: 2026-06-17

Description

Juplink RX4-1500 v1.0.3 allows remote attackers to gain root access to the Linux subsystem via an unsanitized exec call (aka Command Line Injection), if the undocumented telnetd service is enabled and the attacker can authenticate as admin from the local network.

Frequently asked questions

What is CVE-2020-8797?: Juplink RX4-1500 v1.0.3 allows remote attackers to gain root access to the Linux subsystem via an unsanitized exec call (aka Command Line Injection), if the undocumented telnetd service is enabled and the attacker can authenticate as admin from the local network.
How severe is CVE-2020-8797?: CVE-2020-8797 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-2020-8797 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8797?: CVE-2020-8797 affects Juplink Rx4-1500 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-8797?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-8797 published?: CVE-2020-8797 was published on 2020-04-23 and last updated on 2026-06-17.

References

https://cerne.xyz/bugs/CVE-2020-8797.html

Affected products (1)

cpe:2.3:o:juplink:rx4-1500_firmware:1.0.3:*:*:*:*:*:*:*

More vulnerabilities in Juplink Rx4-1500 Firmware

CVE-2023-41028 — Critical (CVSS 9.0): A stack-based buffer overflow exists in Juplink RX4-1500, a WiFi router, in versions 1.0.2 through 1.0.5. An…
CVE-2023-41031 — High (CVSS 8.0): Command injection in homemng.htm in Juplink RX4-1500 versions V1.0.2, V1.0.3, V1.0.4, and V1.0.5 allows remote…
CVE-2023-41029 — High (CVSS 8.0): Command injection vulnerability in the homemng.htm endpoint in Juplink RX4-1500 Wifi router firmware…
CVE-2023-41027 — High (CVSS 8.0): Credential disclosure in the '/webs/userpasswd.htm' endpoint in Juplink RX4-1500 Wifi router firmware versions V1.0.4…
CVE-2023-41030 — Medium (CVSS 6.3): Hard-coded credentials in Juplink RX4-1500 versions V1.0.2 through V1.0.5 allow unauthenticated attackers to log in…
CVE-2020-8798 — Medium (CVSS 5.5): httpd in Juplink RX4-1500 v1.0.3-v1.0.5 allows remote attackers to change or access router settings by connecting to…

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