CVE-2020-7357 | Cayin CMS Command Injection

Exp

Cayin CMS suffers from an authenticated OS semi-blind command injection vulnerability using default credentials. This can be exploited to inject and execute arbitrary shell commands as the root user through the 'NTP_Server_IP' HTTP POST parameter in system.cgi page. This issue affects several branches and versions of the CMS application, including CME-SE, CMS-60, CMS-40, CMS-20, and CMS version 8.2, 8.0, and 7.5.

Published: 2020-08-06 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-7357 is rated High Exploit Risk (86.5/100): CVSS Critical severity, with high exploitation likelihood (EPSS 77.16%, 99th percentile). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2020-7357

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2020-7357

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-04-27 78.71% 77.16% -1.54%
2 2025-11-21 49.99% 78.71% +28.71%
3 2025-11-18 — 49.99% —

Full EPSS history (36 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-7357

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.6 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:N)
Service keeps running; no real outage angle.
 3.1 5.8 [email protected]
9.9 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.1 6.0 [email protected]
9.0 2.0 HIGH
AV:N/AC:L/Au:S/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:S)
A single authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.0 10.0 [email protected]

Weakness enumeration for CVE-2020-7357

Affected software / configurations for CVE-2020-7357

Vendor Product Version Raw CPE
cayintech cms-se_firmware 11.0 cpe:2.3:o:cayintech:cms-se_firmware:11.0:19179:*:*:*:*:*:*
cayintech cms-se_firmware 11.0 cpe:2.3:o:cayintech:cms-se_firmware:11.0:19025:*:*:*:*:*:*
cayintech cms-se_firmware 11.0 cpe:2.3:o:cayintech:cms-se_firmware:11.0:18325:*:*:*:*:*:*
cayintech cms-se-lxc_firmware — cpe:2.3:o:cayintech:cms-se-lxc_firmware:-:*:*:*:*:*:*:*
cayintech cms-60_firmware 11.0 cpe:2.3:o:cayintech:cms-60_firmware:11.0:19025:*:*:*:*:*:*
cayintech cms-40_firmware 9.0 cpe:2.3:o:cayintech:cms-40_firmware:9.0:14197:*:*:*:*:*:*
cayintech cms-40_firmware 9.0 cpe:2.3:o:cayintech:cms-40_firmware:9.0:14199:*:*:*:*:*:*
cayintech cms-40_firmware 9.0 cpe:2.3:o:cayintech:cms-40_firmware:9.0:14093:*:*:*:*:*:*
cayintech cms-20_firmware 9.0 cpe:2.3:o:cayintech:cms-20_firmware:9.0:14197:*:*:*:*:*:*
cayintech cms-20_firmware 9.0 cpe:2.3:o:cayintech:cms-20_firmware:9.0:14092:*:*:*:*:*:*
cayintech cms 7.5 cpe:2.3:o:cayintech:cms:7.5:11175:*:*:*:*:*:*
cayintech cms 8.0 cpe:2.3:o:cayintech:cms:8.0:11175:*:*:*:*:*:*
cayintech cms 8.2 cpe:2.3:o:cayintech:cms:8.2:12199:*:*:*:*:*:*

References for CVE-2020-7357

cvelogic Threat Intelligence