How severe is CVE-2020-26553?

CVE-2020-26553 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-2020-26553 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-26553?

CVE-2020-26553 affects Aviatrix Controller. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-26553?

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-2020-26553 published?

CVE-2020-26553 was published on 2020-11-17 and last updated on 2026-06-17.

CVE-2020-26553

CVE-2020-26553 is a critical-severity vulnerability in Aviatrix Controller 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-434.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Aviatrix Controller
Published: 2020-11-17
Last modified: 2026-06-17

Description

An issue was discovered in Aviatrix Controller before R6.0.2483. Several APIs contain functions that allow arbitrary files to be uploaded to the web tree.

Frequently asked questions

What is CVE-2020-26553?: An issue was discovered in Aviatrix Controller before R6.0.2483. Several APIs contain functions that allow arbitrary files to be uploaded to the web tree.
How severe is CVE-2020-26553?: CVE-2020-26553 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-2020-26553 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-26553?: CVE-2020-26553 affects Aviatrix Controller. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-26553?: 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-2020-26553 published?: CVE-2020-26553 was published on 2020-11-17 and last updated on 2026-06-17.

References

https://www.criticalstart.com/multiple-vulnerabilities-discovered-in-aviatrix/

Affected products (1)

cpe:2.3:a:aviatrix:controller:5.3.1516:*:*:*:*:*:*:*

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