How severe is CVE-2020-8234?

CVE-2020-8234 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-2020-8234 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-8234?

CVE-2020-8234 affects Ui Edgemax Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-8234?

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-2020-8234 published?

CVE-2020-8234 was published on 2020-08-21 and last updated on 2026-06-17.

CVE-2020-8234

CVE-2020-8234 is a critical-severity vulnerability in Ui Edgemax 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-613.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 10.0
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-613
Affected product: Ui Edgemax Firmware
Published: 2020-08-21
Last modified: 2026-06-17

Description

A vulnerability exists in The EdgeMax EdgeSwitch firmware <v1.9.1 where the EdgeSwitch legacy web interface SIDSSL cookie for admin can be guessed, enabling the attacker to obtain high privileges and get a root shell by a Command injection.

Frequently asked questions

What is CVE-2020-8234?: A vulnerability exists in The EdgeMax EdgeSwitch firmware <v1.9.1 where the EdgeSwitch legacy web interface SIDSSL cookie for admin can be guessed, enabling the attacker to obtain high privileges and get a root shell by a Command injection.
How severe is CVE-2020-8234?: CVE-2020-8234 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-2020-8234 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-8234?: CVE-2020-8234 affects Ui Edgemax Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-8234?: 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-2020-8234 published?: CVE-2020-8234 was published on 2020-08-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:ui:edgemax_firmware:*:*:*:*:*:*:*:*

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