How severe is CVE-2021-41530?

CVE-2021-41530 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-41530 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-41530?

CVE-2021-41530 primarily affects Forcepoint Next Generation Firewall. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-41530?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-41530 published?

CVE-2021-41530 was published on 2021-10-04 and last updated on 2026-06-17.

CVE-2021-41530

CVE-2021-41530 is a high-severity vulnerability in Forcepoint Next Generation Firewall with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 4.3
EPSS exploit prediction: 1% (55th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Forcepoint Next Generation Firewall
Published: 2021-10-04
Last modified: 2026-06-17

Description

Forcepoint NGFW Engine versions 6.5.11 and earlier, 6.8.6 and earlier, and 6.10.0 are vulnerable to TCP reflected amplification vulnerability, if HTTP User Response has been configured.

Frequently asked questions

What is CVE-2021-41530?: Forcepoint NGFW Engine versions 6.5.11 and earlier, 6.8.6 and earlier, and 6.10.0 are vulnerable to TCP reflected amplification vulnerability, if HTTP User Response has been configured.
How severe is CVE-2021-41530?: CVE-2021-41530 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-41530 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (55th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-41530?: CVE-2021-41530 primarily affects Forcepoint Next Generation Firewall. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-41530?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-41530 published?: CVE-2021-41530 was published on 2021-10-04 and last updated on 2026-06-17.

References

https://help.forcepoint.com/security/CVE/CVE-2021-41530.html

Affected products (2)

cpe:2.3:a:forcepoint:next_generation_firewall:*:*:*:*:*:*:*:*
cpe:2.3:a:forcepoint:next_generation_firewall:6.10.0:*:*:*:*:*:*:*

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