How severe is CVE-2018-12571?

CVE-2018-12571 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-2018-12571 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 30% (98th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-12571?

CVE-2018-12571 affects Microsoft Forefront Unified Access Gateway. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-12571?

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-2018-12571 published?

CVE-2018-12571 was published on 2018-07-05 and last updated on 2026-06-17.

CVE-2018-12571

CVE-2018-12571 is a critical-severity vulnerability in Microsoft Forefront Unified Access Gateway with a CVSS 3.x base score of 9.8. Its EPSS exploit-prediction score of 30% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-918.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 30% (98th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-918
Affected product: Microsoft Forefront Unified Access Gateway
Published: 2018-07-05
Last modified: 2026-06-17

Description

uniquesig0/InternalSite/InitParams.aspx in Microsoft Forefront Unified Access Gateway 2010 allows remote attackers to trigger outbound DNS queries for arbitrary hosts via a comma-separated list of URLs in the orig_url parameter, possibly causing a traffic amplification and/or SSRF outcome.

Frequently asked questions

What is CVE-2018-12571?: uniquesig0/InternalSite/InitParams.aspx in Microsoft Forefront Unified Access Gateway 2010 allows remote attackers to trigger outbound DNS queries for arbitrary hosts via a comma-separated list of URLs in the orig_url parameter, possibly causing a traffic amplification and/or SSRF outcome.
How severe is CVE-2018-12571?: CVE-2018-12571 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-2018-12571 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 30% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-12571?: CVE-2018-12571 affects Microsoft Forefront Unified Access Gateway. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-12571?: 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-2018-12571 published?: CVE-2018-12571 was published on 2018-07-05 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:microsoft:forefront_unified_access_gateway:2010:*:*:*:*:*:*:*

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