How severe is CVE-2018-3881?

CVE-2018-3881 has a CVSS 3.x base score of 9.4, 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 low, and availability high.

Is CVE-2018-3881 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-3881?

CVE-2018-3881 affects Focalscope. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-3881?

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-2018-3881 published?

CVE-2018-3881 was published on 2018-08-01 and last updated on 2026-06-17.

CVE-2018-3881

CVE-2018-3881 is a critical-severity vulnerability in Focalscope with a CVSS 3.x base score of 9.4. 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-611.

Key facts

Severity: Critical (CVSS 3.x base score 9.4)
CVSS v2: 7.5
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-611
Affected product: Focalscope
Published: 2018-08-01
Last modified: 2026-06-17

Description

An exploitable unauthenticated XML external injection vulnerability was identified in FocalScope v2416. A unauthenticated attacker could submit a specially crafted web request to FocalScope's server that could cause an XXE, and potentially result in data compromise.

Frequently asked questions

What is CVE-2018-3881?: An exploitable unauthenticated XML external injection vulnerability was identified in FocalScope v2416. A unauthenticated attacker could submit a specially crafted web request to FocalScope's server that could cause an XXE, and potentially result in data compromise.
How severe is CVE-2018-3881?: CVE-2018-3881 has a CVSS 3.x base score of 9.4, 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 low, and availability high.
Is CVE-2018-3881 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-3881?: CVE-2018-3881 affects Focalscope. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-3881?: 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-2018-3881 published?: CVE-2018-3881 was published on 2018-08-01 and last updated on 2026-06-17.

References

https://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0559

Affected products (1)

cpe:2.3:a:focalscope:focalscope:2416:*:*:*:*:*:*:*

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