How severe is CVE-2020-5771?

CVE-2020-5771 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-5771 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-5771?

CVE-2020-5771 affects Teltonika-networks Trb245 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-5771?

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-2020-5771 published?

CVE-2020-5771 was published on 2020-08-03 and last updated on 2026-06-17.

CVE-2020-5771

CVE-2020-5771 is a high-severity vulnerability in Teltonika-networks Trb245 Firmware with a CVSS 3.x base score of 7.5. 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-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 7.1
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Teltonika-networks Trb245 Firmware
Published: 2020-08-03
Last modified: 2026-06-17

Description

Improper Input Validation in Teltonika firmware TRB2_R_00.02.04.01 allows a remote, authenticated attacker to gain root privileges by uploading a malicious backup archive.

Frequently asked questions

What is CVE-2020-5771?: Improper Input Validation in Teltonika firmware TRB2_R_00.02.04.01 allows a remote, authenticated attacker to gain root privileges by uploading a malicious backup archive.
How severe is CVE-2020-5771?: CVE-2020-5771 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-5771 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-5771?: CVE-2020-5771 affects Teltonika-networks Trb245 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-5771?: 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-2020-5771 published?: CVE-2020-5771 was published on 2020-08-03 and last updated on 2026-06-17.

References

https://www.tenable.com/security/research/tra-2020-48

Affected products (1)

cpe:2.3:o:teltonika-networks:trb245_firmware:00.02.04.01:*:*:*:*:*:*:*

More vulnerabilities in Teltonika-networks Trb245 Firmware

CVE-2020-5786 — High (CVSS 8.8): Cross-site request forgery in Teltonika firmware TRB2_R_00.02.04.3 allows a remote attacker to perform sensitive…
CVE-2020-5773 — High (CVSS 8.8): Improper Access Control in Teltonika firmware TRB2_R_00.02.04.01 allows a low privileged user to perform unauthorized…
CVE-2020-5770 — High (CVSS 8.8): Cross-site request forgery in Teltonika firmware TRB2_R_00.02.04.01 allows a remote attacker to perform sensitive…
CVE-2020-5772 — High (CVSS 7.5): Improper Input Validation in Teltonika firmware TRB2_R_00.02.04.01 allows a remote, authenticated attacker to gain root…
CVE-2020-5789 — Medium (CVSS 6.5): Relative Path Traversal in Teltonika firmware TRB2_R_00.02.04.3 allows a remote, authenticated attacker to read the…
CVE-2020-5788 — Medium (CVSS 6.5): Relative Path Traversal in Teltonika firmware TRB2_R_00.02.04.3 allows a remote, authenticated attacker to delete…

All CVEs affecting Teltonika-networks Trb245 Firmware →

Other CWE-20 (Improper Input Validation) vulnerabilities

CVE-2026-48056 — Critical (CVSS 10.0): Streambert is a cross-platform Electron Desktop App to stream and download video content. Versions prior to 2.5.0…
CVE-2026-33267 — Critical (CVSS 10.0): Improper Input Validation vulnerability in Apache Traffic Server. This issue affects Apache Traffic Server: from 9.2.0…
CVE-2026-47668 — Critical (CVSS 10.0): DbGate is cross-platform database manager. In versions 7.1.8 and prior, DbGate's JSON script runner (`POST…
CVE-2026-16117 — Critical (CVSS 10.0): Impact: @fastify/http-proxy versions up to and including 11.5.0 fail to rewrite the request prefix when the prefix…
CVE-2026-48316 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…
CVE-2026-48281 — Critical (CVSS 10.0): ColdFusion versions 2025.9, 2023.20 and earlier are affected by an Improper Input Validation vulnerability that could…

Browse all CWE-20 (Improper Input Validation) vulnerabilities →