How severe is CVE-2020-25749?

CVE-2020-25749 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-25749 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-25749?

CVE-2020-25749 primarily affects Rubetek Rv-3406 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-2020-25749?

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

When was CVE-2020-25749 published?

CVE-2020-25749 was published on 2020-09-25 and last updated on 2026-06-17.

CVE-2020-25749

CVE-2020-25749 is a critical-severity vulnerability in Rubetek Rv-3406 Firmware with a CVSS 3.x base score of 9.8. 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-798.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Rubetek Rv-3406 Firmware
Published: 2020-09-25
Last modified: 2026-06-17

Description

The Telnet service of Rubetek cameras RV-3406, RV-3409, and RV-3411 cameras (firmware versions v342, v339) could allow an remote attacker to take full control of the device with a high-privileged account. The vulnerability exists because a system account has a default and static password. The Telnet service cannot be disabled and this password cannot be changed via standard functionality.

Frequently asked questions

What is CVE-2020-25749?: The Telnet service of Rubetek cameras RV-3406, RV-3409, and RV-3411 cameras (firmware versions v342, v339) could allow an remote attacker to take full control of the device with a high-privileged account. The vulnerability exists because a system account has a default and static password. The Telnet service cannot be disabled and this password cannot be changed via standard functionality.
How severe is CVE-2020-25749?: CVE-2020-25749 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-25749 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-25749?: CVE-2020-25749 primarily affects Rubetek Rv-3406 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-2020-25749?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-25749 published?: CVE-2020-25749 was published on 2020-09-25 and last updated on 2026-06-17.

References

https://github.com/jet-pentest/CVE-2020-25749

Affected products (6)

cpe:2.3:o:rubetek:rv-3406_firmware:339:*:*:*:*:*:*:*
cpe:2.3:o:rubetek:rv-3406_firmware:342:*:*:*:*:*:*:*
cpe:2.3:o:rubetek:rv-3409_firmware:339:*:*:*:*:*:*:*
cpe:2.3:o:rubetek:rv-3409_firmware:342:*:*:*:*:*:*:*
cpe:2.3:o:rubetek:rv-3411_firmware:339:*:*:*:*:*:*:*
cpe:2.3:o:rubetek:rv-3411_firmware:342:*:*:*:*:*:*:*

More vulnerabilities in Rubetek Rv-3406 Firmware

CVE-2020-25747 — Critical (CVSS 9.4): The Telnet service of Rubetek RV-3406, RV-3409, and RV-3411 cameras (firmware versions v342, v339) can allow a remote…
CVE-2020-25748 — High (CVSS 8.1): A Cleartext Transmission issue was discovered on Rubetek RV-3406, RV-3409, and RV-3411 cameras (firmware versions v342,…

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