CVE-2021-25848

Improper validation of the length field of LLDP-MED TLV in userdisk/vport_lldpd in Moxa Camera VPort 06EC-2V Series, version 1.1, allows information disclosure to attackers due to using fixed loop counter variable without checking the actual available length via a crafted lldp packet.

Published: 2021-05-10 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-25848 is rated Moderate Risk (59.5/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 1.19%). Review affected assets and schedule remediation.

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

Exploit prediction scoring system (EPSS) score for CVE-2021-25848

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 0.38% 1.19% +0.80%
2 2025-03-30 0.89% 0.38% -0.51%
3 2025-03-29 — 0.89% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-25848

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.1 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/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:H)
Serious risk that confidential data gets exposed in a big 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 5.2 [email protected]
8.5 2.0 HIGH
AV:N/AC:L/Au:N/C:P/I:N/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:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 7.8 [email protected]

Weakness enumeration for CVE-2021-25848

Affected software / configurations for CVE-2021-25848

Vendor Product Version Raw CPE
moxa vport_06ec-2v26m_firmware <= 1.1 cpe:2.3:o:moxa:vport_06ec-2v26m_firmware:*:*:*:*:*:*:*:*
moxa vport_06ec-2v36m-t_firmware <= 1.1 cpe:2.3:o:moxa:vport_06ec-2v36m-t_firmware:*:*:*:*:*:*:*:*
moxa vport_06ec-2v36m-ct_firmware <= 1.1 cpe:2.3:o:moxa:vport_06ec-2v36m-ct_firmware:*:*:*:*:*:*:*:*
moxa vport_06ec-2v36m-ct-t_firmware <= 1.1 cpe:2.3:o:moxa:vport_06ec-2v36m-ct-t_firmware:*:*:*:*:*:*:*:*
moxa vport_06ec-2v42m_firmware <= 1.1 cpe:2.3:o:moxa:vport_06ec-2v42m_firmware:*:*:*:*:*:*:*:*
moxa vport_06ec-2v42m-t_firmware <= 1.1 cpe:2.3:o:moxa:vport_06ec-2v42m-t_firmware:*:*:*:*:*:*:*:*
moxa vport_06ec-2v42m-ct_firmware <= 1.1 cpe:2.3:o:moxa:vport_06ec-2v42m-ct_firmware:*:*:*:*:*:*:*:*
moxa vport_06ec-2v42m-ct-t_firmware <= 1.1 cpe:2.3:o:moxa:vport_06ec-2v42m-ct-t_firmware:*:*:*:*:*:*:*:*
moxa vport_06ec-2v60m_firmware <= 1.1 cpe:2.3:o:moxa:vport_06ec-2v60m_firmware:*:*:*:*:*:*:*:*
moxa vport_06ec-2v60m-t_firmware <= 1.1 cpe:2.3:o:moxa:vport_06ec-2v60m-t_firmware:*:*:*:*:*:*:*:*
moxa vport_06ec-2v60m-ct_firmware <= 1.1 cpe:2.3:o:moxa:vport_06ec-2v60m-ct_firmware:*:*:*:*:*:*:*:*
moxa vport_06ec-2v60m-ct-t_firmware <= 1.1 cpe:2.3:o:moxa:vport_06ec-2v60m-ct-t_firmware:*:*:*:*:*:*:*:*
moxa vport_06ec-2v80m_firmware <= 1.1 cpe:2.3:o:moxa:vport_06ec-2v80m_firmware:*:*:*:*:*:*:*:*
moxa vport_06ec-2v80m-t_firmware <= 1.1 cpe:2.3:o:moxa:vport_06ec-2v80m-t_firmware:*:*:*:*:*:*:*:*
moxa vport_06ec-2v80m-ct_firmware <= 1.1 cpe:2.3:o:moxa:vport_06ec-2v80m-ct_firmware:*:*:*:*:*:*:*:*
moxa vport_06ec-2v80m-ct-t_firmware <= 1.1 cpe:2.3:o:moxa:vport_06ec-2v80m-ct-t_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-25848

cvelogic Threat Intelligence