How severe is CVE-2020-12839?

CVE-2020-12839 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-2020-12839 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-12839?

CVE-2020-12839 affects Gogogate Ismartgate Pro Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-12839?

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-2020-12839 published?

CVE-2020-12839 was published on 2020-09-24 and last updated on 2026-06-17.

CVE-2020-12839

CVE-2020-12839 is a critical-severity vulnerability in Gogogate Ismartgate Pro 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-732.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (72nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-732
Affected product: Gogogate Ismartgate Pro Firmware
Published: 2020-09-24
Last modified: 2026-06-17

Description

ismartgate PRO 1.5.9 is vulnerable to privilege escalation by appending PHP code to /cron/checkExpirationDate.php.

Frequently asked questions

What is CVE-2020-12839?: ismartgate PRO 1.5.9 is vulnerable to privilege escalation by appending PHP code to /cron/checkExpirationDate.php.
How severe is CVE-2020-12839?: CVE-2020-12839 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-2020-12839 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (72nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-12839?: CVE-2020-12839 affects Gogogate Ismartgate Pro Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-12839?: 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-2020-12839 published?: CVE-2020-12839 was published on 2020-09-24 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:gogogate:ismartgate_pro_firmware:1.5.9:*:*:*:*:*:*:*

More vulnerabilities in Gogogate Ismartgate Pro Firmware

CVE-2020-12843 — Critical (CVSS 9.8): ismartgate PRO 1.5.9 is vulnerable to malicious file uploads via the form for uploading sounds to garage doors. The…
CVE-2020-12842 — Critical (CVSS 9.8): ismartgate PRO 1.5.9 is vulnerable to privilege escalation by appending PHP code to /cron/checkUserExpirationDate.php.
CVE-2020-12838 — Critical (CVSS 9.8): ismartgate PRO 1.5.9 is vulnerable to privilege escalation by appending PHP code to /cron/mailAdmin.php.
CVE-2020-12282 — High (CVSS 8.8): iSmartgate PRO 1.5.9 is vulnerable to CSRF via the busca parameter in the form used for searching for users, accessible…
CVE-2020-13119 — High (CVSS 8.1): ismartgate PRO 1.5.9 is vulnerable to clickjacking.
CVE-2020-12837 — High (CVSS 7.5): ismartgate PRO 1.5.9 is vulnerable to malicious file uploads via the form for uploading images to garage doors. The…

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