CVE-2020-21996

Exp

AVE DOMINAplus <=1.10.x suffers from an unauthenticated reboot command execution. Attackers can exploit this issue to cause a denial of service scenario.

Published: 2021-04-28 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2020-21996 is rated High Exploit Risk (73.4/100): CVSS High severity, with medium exploitation likelihood (EPSS 3.56%). 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-2020-21996

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-2020-21996

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 2026-06-15 5.91% 3.56% -2.34%
2 2025-11-21 4.07% 5.91% +1.83%
3 2025-11-18 — 4.07% —

Full EPSS history (23 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2020-21996

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P 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:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2020-21996

Affected software / configurations for CVE-2020-21996

Vendor Product Version Raw CPE
ave dominaplus >= 1.8.4, <= 1.10.77 cpe:2.3:a:ave:dominaplus:*:*:*:*:*:*:*:*
ave 53ab-wbs_firmware 1.10.62 cpe:2.3:o:ave:53ab-wbs_firmware:1.10.62:*:*:*:*:*:*:*
ave ts01_firmware 1.0.65 cpe:2.3:o:ave:ts01_firmware:1.0.65:*:*:*:*:*:*:*
ave ts03x-v_firmware 1.10.45a cpe:2.3:o:ave:ts03x-v_firmware:1.10.45a:*:*:*:*:*:*:*
ave ts04x-v_firmware 1.10.45a cpe:2.3:o:ave:ts04x-v_firmware:1.10.45a:*:*:*:*:*:*:*
ave ts05_firmware 1.10.36 cpe:2.3:o:ave:ts05_firmware:1.10.36:*:*:*:*:*:*:*
ave ts05n-v_firmware — cpe:2.3:o:ave:ts05n-v_firmware:-:*:*:*:*:*:*:*

References for CVE-2020-21996

URL Tags
https://cwe.mitre.org/data/definitions/306.html Technical Description
https://www.exploit-db.com/exploits/47820 Exploit Third Party Advisory VDB Entry
https://www.zeroscience.mk/en/vulnerabilities/ZSL-2019-5548.php Exploit Third Party Advisory
cvelogic Threat Intelligence