How severe is CVE-2021-29891?

CVE-2021-29891 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-2021-29891 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-29891?

CVE-2021-29891 primarily affects Ibm Power System Ac922 (8335-gtg) Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-29891?

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

When was CVE-2021-29891 published?

CVE-2021-29891 was published on 2022-08-22 and last updated on 2026-06-17.

CVE-2021-29891

CVE-2021-29891 is a medium-severity vulnerability in Ibm Power System Ac922 (8335-gtg) 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-434.

Key facts

Severity: Medium (CVSS 3.x base score 4.9)
EPSS exploit prediction: 0% (31st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-434
Affected product: Ibm Power System Ac922 (8335-gtg) Firmware
Published: 2022-08-22
Last modified: 2026-06-17

Description

IBM OPENBMC OP910 and OP940 could allow a privileged user to upload an improper site identity certificate that may cause it to lose network services. IBM X-Force ID: 207221.

Frequently asked questions

What is CVE-2021-29891?: IBM OPENBMC OP910 and OP940 could allow a privileged user to upload an improper site identity certificate that may cause it to lose network services. IBM X-Force ID: 207221.
How severe is CVE-2021-29891?: CVE-2021-29891 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-2021-29891 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (31st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-29891?: CVE-2021-29891 primarily affects Ibm Power System Ac922 (8335-gtg) Firmware. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-29891?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-29891 published?: CVE-2021-29891 was published on 2022-08-22 and last updated on 2026-06-17.

References

Affected products (6)

cpe:2.3:o:ibm:power_system_ac922_\(8335-gtg\)_firmware:op910:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_ac922_\(8335-gtx\)_firmware:op910:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_ac922_\(8335-gtx\)_firmware:op940:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_ac922_\(8335-gth\)_firmware:op910:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_ac922_\(8335-gth\)_firmware:op940:*:*:*:*:*:*:*
cpe:2.3:o:ibm:hardware_management_console_7063-cr2_firmware:op940:*:*:*:*:*:*:*

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