How severe is CVE-2021-3809?

CVE-2021-3809 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-3809 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-3809?

CVE-2021-3809 primarily affects Hp Elite Dragonfly Firmware. In total, 181 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-3809?

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-2021-3809 published?

CVE-2021-3809 was published on 2023-02-01 and last updated on 2026-06-17.

CVE-2021-3809

CVE-2021-3809 is a high-severity vulnerability in Hp Elite Dragonfly Firmware with a CVSS 3.x base score of 7.8. 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-269.

Key facts

Severity: High (CVSS 3.x base score 7.8)
EPSS exploit prediction: 0% (16th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-269
Affected product: Hp Elite Dragonfly Firmware
Published: 2023-02-01
Last modified: 2026-06-17

Description

Potential security vulnerabilities have been identified in the BIOS (UEFI Firmware) for certain HP PC products, which might allow arbitrary code execution. HP is releasing firmware updates to mitigate these potential vulnerabilities.

Frequently asked questions

What is CVE-2021-3809?: Potential security vulnerabilities have been identified in the BIOS (UEFI Firmware) for certain HP PC products, which might allow arbitrary code execution. HP is releasing firmware updates to mitigate these potential vulnerabilities.
How severe is CVE-2021-3809?: CVE-2021-3809 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-3809 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (16th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-3809?: CVE-2021-3809 primarily affects Hp Elite Dragonfly Firmware. In total, 181 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-3809?: 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-2021-3809 published?: CVE-2021-3809 was published on 2023-02-01 and last updated on 2026-06-17.

References

https://support.hp.com/us-en/document/ish_6184733-6184761-16/hpsbhf03788

Affected products (181)

cpe:2.3:o:hp:elite_dragonfly_firmware:01.12.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elite_x2_1012_g2_firmware:1.41:*:*:*:*:*:*:*
cpe:2.3:o:hp:elite_x2_1013_g3_firmware:01.19.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elite_x2_g4_firmware:01.12.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_1040_g4_firmware:1.41:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_1050_g1_firmware:01.19.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_725_g4_firmware:1.4:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_735_g5_firmware:01.20.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_735_g6_firmware:01.19.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_745_g4_firmware:1.4:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_745_g5_firmware:01.20.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_745_g6_firmware:01.19.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_755_g4_firmware:1.4:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_755_g5_firmware:01.20.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_820_g4_firmware:1.41:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_828_g4_firmware:1.41:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_830_g5_firmware:01.19.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_830_g6_firmware:01.12.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_836_g5_firmware:01.19.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_836_g6_firmware:01.12.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_840_g4_firmware:1.41:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_840_g5_firmware:01.19.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_840_g6_firmware:01.12.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_840r_g4_firmware:01.19.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_846_g5_firmware:01.19.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_848_g4_firmware:1.41:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_850_g4_firmware:1.41:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_850_g5_firmware:01.19.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_850_g6_firmware:01.12.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_x360_1020_g2_firmware:1.41:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_x360_1030_g2_firmware:1.41:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_x360_1030_g3_firmware:01.19.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_x360_1030_g4_firmware:01.12.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_x360_1040_g5_firmware:01.19.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_x360_1040_g6_firmware:01.12.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_x360_830_g5_firmware:01.19.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:elitebook_x360_830_g6_firmware:01.12.00:*:*:*:*:*:*:*
cpe:2.3:o:hp:pro_x2_612_g2_firmware:1.41:*:*:*:*:*:*:*
cpe:2.3:o:hp:probook_11_ee_g2_firmware:1.55:*:*:*:*:*:*:*
cpe:2.3:o:hp:probook_430_g4_firmware:1.41:*:*:*:*:*:*:*

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