How severe is CVE-2020-35464?

CVE-2020-35464 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-2020-35464 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35464?

CVE-2020-35464 affects Weave Cloud Agent. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-35464?

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-2020-35464 published?

CVE-2020-35464 was published on 2020-12-15 and last updated on 2026-06-17.

CVE-2020-35464

CVE-2020-35464 is a critical-severity vulnerability in Weave Cloud Agent 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-306.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Weave Cloud Agent
Published: 2020-12-15
Last modified: 2026-06-17

Description

Version 1.3.0 of the Weave Cloud Agent Docker image contains a blank password for the root user. Systems deployed using affected versions of the Weave Cloud Agent container may allow a remote attacker to achieve root access with a blank password.

Frequently asked questions

What is CVE-2020-35464?: Version 1.3.0 of the Weave Cloud Agent Docker image contains a blank password for the root user. Systems deployed using affected versions of the Weave Cloud Agent container may allow a remote attacker to achieve root access with a blank password.
How severe is CVE-2020-35464?: CVE-2020-35464 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-2020-35464 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35464?: CVE-2020-35464 affects Weave Cloud Agent. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-35464?: 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-2020-35464 published?: CVE-2020-35464 was published on 2020-12-15 and last updated on 2026-06-17.

References

https://github.com/donghyunlee00/CVE/blob/main/CVE-2020-35464

Affected products (1)

cpe:2.3:a:weave:cloud_agent:1.3.0:*:*:*:*:*:*:*

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