How severe is CVE-2021-28196?

CVE-2021-28196 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-28196 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28196?

CVE-2021-28196 primarily affects Asus Asmb9-ikvm Firmware. In total, 44 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-28196?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-28196 published?

CVE-2021-28196 was published on 2021-04-06 and last updated on 2026-06-17.

CVE-2021-28196

CVE-2021-28196 is a medium-severity vulnerability in Asus Asmb9-ikvm Firmware with a CVSS 3.x base score of 4.9. 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-120.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
CVSS v2: 4.0
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Asus Asmb9-ikvm Firmware
Published: 2021-04-06
Last modified: 2026-06-17

Description

The specific function in ASUS BMC’s firmware Web management page (Generate SSL certificate function) does not verify the string length entered by users, resulting in a Buffer overflow vulnerability. As obtaining the privileged permission, remote attackers use the leakage to abnormally terminate the Web service.

Frequently asked questions

What is CVE-2021-28196?: The specific function in ASUS BMC’s firmware Web management page (Generate SSL certificate function) does not verify the string length entered by users, resulting in a Buffer overflow vulnerability. As obtaining the privileged permission, remote attackers use the leakage to abnormally terminate the Web service.
How severe is CVE-2021-28196?: CVE-2021-28196 has a CVSS 3.x base score of 4.9, rated medium severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-28196 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28196?: CVE-2021-28196 primarily affects Asus Asmb9-ikvm Firmware. In total, 44 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-28196?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-28196 published?: CVE-2021-28196 was published on 2021-04-06 and last updated on 2026-06-17.

References

Affected products (44)

cpe:2.3:o:asus:asmb9-ikvm_firmware:1.11.12:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs720a-e9-rs24-e_firmware:1.10.3:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs700a-e9-rs4_firmware:1.10.0:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs700-e9-rs4_firmware:1.09:*:*:*:*:*:*:*
cpe:2.3:o:asus:esc4000_g4x_firmware:1.11.6:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs700-e9-rs12_firmware:1.11.5:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs100-e10-pi2_firmware:1.13.6:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs300-e10-ps4_firmware:1.13.6:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs300-e10-rs4_firmware:1.13.6:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs500a-e9-ps4_firmware:1.14.1:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs500a-e9-rs4_firmware:1.14.1:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs500a-e9_rs4_u_firmware:1.14.1:*:*:*:*:*:*:*
cpe:2.3:o:asus:e700_g4_firmware:1.14.1:*:*:*:*:*:*:*
cpe:2.3:o:asus:ws_c422_pro\/se_firmware:1.14.1:*:*:*:*:*:*:*
cpe:2.3:o:asus:ws_x299_pro\/se_firmware:1.14.1:*:*:*:*:*:*:*
cpe:2.3:o:asus:z11pa-u12_firmware:1.15.1:*:*:*:*:*:*:*
cpe:2.3:o:asus:z11pa-u12\/10g-2s_firmware:1.15.1:*:*:*:*:*:*:*
cpe:2.3:o:asus:knpa-u16_firmware:1.13.4:*:*:*:*:*:*:*
cpe:2.3:o:asus:esc4000_dhd_g4_firmware:1.13.7:*:*:*:*:*:*:*
cpe:2.3:o:asus:esc4000_g4_firmware:1.15.2:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs720q-e9-rs24-s_firmware:1.15.0:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs720q-e9-rs8_firmware:1.15.0:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs720q-e9-rs8-s_firmware:1.15.0:*:*:*:*:*:*:*
cpe:2.3:o:asus:z11pa-d8_firmware:1.14.1:*:*:*:*:*:*:*
cpe:2.3:o:asus:z11pa-d8c_firmware:1.14.1:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs720-e9-rs24-u_firmware:1.14.3:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs720-e9-rs8-g_firmware:1.15.2:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs500-e9-ps4_firmware:1.15.4:*:*:*:*:*:*:*
cpe:2.3:o:asus:pro_e800_g4_firmware:1.14.2:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs500-e9-rs4_firmware:1.15.4:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs500-e9-rs4-u_firmware:1.15.4:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs520-e9-rs12-e_firmware:1.15.3:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs520-e9-rs8_firmware:1.15.3:*:*:*:*:*:*:*
cpe:2.3:o:asus:esc8000_g4_firmware:1.15.4:*:*:*:*:*:*:*
cpe:2.3:o:asus:esc8000_g4\/10g_firmware:1.15.4:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs720-e9-rs12-e_firmware:1.15.2:*:*:*:*:*:*:*
cpe:2.3:o:asus:ws_c621e_sage_firmware:1.15.1:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs500a-e10-ps4_firmware:1.15.2:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs500a-e10-rs4_firmware:1.15.2:*:*:*:*:*:*:*
cpe:2.3:o:asus:rs700a-e9-rs12v2_firmware:1.15.1:*:*:*:*:*:*:*

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