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CVE-2020-12839

24
FAUCET Score

CVE-2020-12839 describes a critical privilege escalation vulnerability in ismartgate PRO firmware version 1.5.9, allowing attackers to append malicious PHP code to a cron job file. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network without authentication, leading to complete compromise of confidentiality, integrity, and availability. Despite its severity, there is currently no public exploit code available, nor any evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
1.5.9CPE matchmatch criteria
cpe:2.3:o:gogogate:ismartgate_pro_firmware:1.5.9:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.55%
Probability of exploitation in next 30 days
EPSS Percentile
72.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0155 is in the 60th percentile among its peer group of 36,835 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

ismartgate.com / secure-garage-door
ProductVendor Advisory
kth.diva-portal.org / smash/get/diva2:1464458/FULLTEXT01.pdf
ExploitThird Party Advisory