How severe is CVE-2020-29378?

CVE-2020-29378 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-29378 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-2020-29378?

CVE-2020-29378 primarily affects Vsolcn V1600d Firmware. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-29378?

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-2020-29378 published?

CVE-2020-29378 was published on 2020-11-29 and last updated on 2026-06-17.

CVE-2020-29378

CVE-2020-29378 is a high-severity vulnerability in Vsolcn V1600d Firmware with a CVSS 3.x base score of 8.8. 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-287.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 1% (61st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Vsolcn V1600d Firmware
Published: 2020-11-29
Last modified: 2026-06-17

Description

An issue was discovered on V-SOL V1600D V2.03.69 and V2.03.57, V1600D4L V1.01.49, V1600D-MINI V1.01.48, V1600G1 V2.0.7 and V1.9.7, and V1600G2 V1.1.4 OLT devices. It is possible to elevate the privilege of a CLI user (to full administrative access) by using the password !j@l#y$z%x6x7q8c9z) for the enable command.

Frequently asked questions

What is CVE-2020-29378?: An issue was discovered on V-SOL V1600D V2.03.69 and V2.03.57, V1600D4L V1.01.49, V1600D-MINI V1.01.48, V1600G1 V2.0.7 and V1.9.7, and V1600G2 V1.1.4 OLT devices. It is possible to elevate the privilege of a CLI user (to full administrative access) by using the password !j@l#y$z%x6x7q8c9z) for the enable command.
How severe is CVE-2020-29378?: CVE-2020-29378 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-29378 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-2020-29378?: CVE-2020-29378 primarily affects Vsolcn V1600d Firmware. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-29378?: 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-2020-29378 published?: CVE-2020-29378 was published on 2020-11-29 and last updated on 2026-06-17.

References

https://seclists.org/fulldisclosure/2020/Jul/14

Affected products (7)

cpe:2.3:o:vsolcn:v1600d_firmware:2.03.57:*:*:*:*:*:*:*
cpe:2.3:o:vsolcn:v1600d_firmware:2.03.69:*:*:*:*:*:*:*
cpe:2.3:o:vsolcn:v1600d4l_firmware:1.01.49:*:*:*:*:*:*:*
cpe:2.3:o:vsolcn:v1600d-mini_firmware:1.01.48:*:*:*:*:*:*:*
cpe:2.3:o:vsolcn:v1600g1_firmware:1.9.7:*:*:*:*:*:*:*
cpe:2.3:o:vsolcn:v1600g1_firmware:2.0.7:*:*:*:*:*:*:*
cpe:2.3:o:vsolcn:v1600g2_firmware:1.1.4:*:*:*:*:*:*:*

More vulnerabilities in Vsolcn V1600d Firmware

CVE-2020-29381 — Critical (CVSS 9.8): An issue was discovered on V-SOL V1600D V2.03.69 and V2.03.57, V1600D4L V1.01.49, V1600D-MINI V1.01.48, V1600G1 V2.0.7…
CVE-2020-29377 — Critical (CVSS 9.8): An issue was discovered on V-SOL V1600D V2.03.69 OLT devices. The string K0LTdi@gnos312$ is compared to the password…
CVE-2020-29376 — Critical (CVSS 9.8): An issue was discovered on V-SOL V1600D V2.03.69 and V2.03.57, V1600D4L V1.01.49, V1600D-MINI V1.01.48, V1600G1 V2.0.7…
CVE-2020-29375 — High (CVSS 8.8): An issue was discovered on V-SOL V1600D V2.03.69 and V2.03.57, V1600D4L V1.01.49, V1600D-MINI V1.01.48, V1600G1 V2.0.7…
CVE-2020-29382 — High (CVSS 7.8): An issue was discovered on V-SOL V1600D V2.03.69 and V2.03.57, V1600G1 V2.0.7 and V1.9.7, and V1600G2 V1.1.4 OLT…
CVE-2020-29380 — Medium (CVSS 5.9): An issue was discovered on V-SOL V1600D V2.03.69 and V2.03.57, V1600D4L V1.01.49, V1600D-MINI V1.01.48, V1600G1 V2.0.7…

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