How severe is CVE-2018-20392?

CVE-2018-20392 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-2018-20392 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-20392?

CVE-2018-20392 affects Cisco Dpc2100 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-20392?

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-2018-20392 published?

CVE-2018-20392 was published on 2018-12-23 and last updated on 2026-06-17.

CVE-2018-20392

CVE-2018-20392 is a critical-severity vulnerability in Cisco Dpc2100 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-522.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 5.0
EPSS exploit prediction: 2% (74th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-522
Affected product: Cisco Dpc2100 Firmware
Published: 2018-12-23
Last modified: 2026-06-17

Description

S-A WebSTAR DPC2100 v2.0.2r1256-060303 devices allow remote attackers to discover credentials via iso.3.6.1.4.1.4491.2.4.1.1.6.1.1.0 and iso.3.6.1.4.1.4491.2.4.1.1.6.1.2.0 SNMP requests.

Frequently asked questions

What is CVE-2018-20392?: S-A WebSTAR DPC2100 v2.0.2r1256-060303 devices allow remote attackers to discover credentials via iso.3.6.1.4.1.4491.2.4.1.1.6.1.1.0 and iso.3.6.1.4.1.4491.2.4.1.1.6.1.2.0 SNMP requests.
How severe is CVE-2018-20392?: CVE-2018-20392 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-2018-20392 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (74th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-20392?: CVE-2018-20392 affects Cisco Dpc2100 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-20392?: 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-2018-20392 published?: CVE-2018-20392 was published on 2018-12-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:cisco:dpc2100_firmware:2.0.2r1256-060303:*:*:*:*:*:*:*

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