How severe is CVE-2021-45735?

CVE-2021-45735 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-45735 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-45735?

CVE-2021-45735 affects Totolink X5000r Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-45735?

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-2021-45735 published?

CVE-2021-45735 was published on 2022-02-04 and last updated on 2026-06-17.

CVE-2021-45735

CVE-2021-45735 is a high-severity vulnerability in Totolink X5000r 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-319.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 4% (89th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-319
Affected product: Totolink X5000r Firmware
Published: 2022-02-04
Last modified: 2026-06-17

Description

TOTOLINK X5000R v9.1.0u.6118_B20201102 was discovered to use the HTTP protocol for authentication into the admin interface, allowing attackers to intercept user credentials via packet capture software.

Frequently asked questions

What is CVE-2021-45735?: TOTOLINK X5000R v9.1.0u.6118_B20201102 was discovered to use the HTTP protocol for authentication into the admin interface, allowing attackers to intercept user credentials via packet capture software.
How severe is CVE-2021-45735?: CVE-2021-45735 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-45735 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-45735?: CVE-2021-45735 affects Totolink X5000r Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-45735?: 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-2021-45735 published?: CVE-2021-45735 was published on 2022-02-04 and last updated on 2026-06-17.

References

https://github.com/pjqwudi/my_vuln/blob/main/totolink/vuln_12/12.md

Affected products (1)

cpe:2.3:o:totolink:x5000r_firmware:9.1.0u.6118_b20201102:*:*:*:*:*:*:*

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