How severe is CVE-2026-4936?

CVE-2026-4936 has a CVSS 3.x base score of 5.1, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-4936 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4936?

CVE-2026-4936 primarily affects Ibm Power System S1122 (9824-22a) Firmware. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-4936?

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

When was CVE-2026-4936 published?

CVE-2026-4936 was published on 2026-08-19 and last updated on 2026-08-25.

CVE-2026-4936

CVE-2026-4936 is a medium-severity vulnerability in Ibm Power System S1122 (9824-22a) Firmware with a CVSS 3.x base score of 5.1. 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-331.

Key facts

Severity: Medium (CVSS 3.x base score 5.1)
EPSS exploit prediction: 0% (1st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-331
Affected product: Ibm Power System S1122 (9824-22a) Firmware
Published: 2026-08-19
Last modified: 2026-08-25

Description

IBM PowerVM Hypervisor Platform KeyStore (PKS) and virtual TPM FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H2 use persistent storage key seeds that result in an AES key with reduced strength. An attacker with access to the service processor or HMC could exploit this weakness to derive the encryption key and access the data.

Frequently asked questions

What is CVE-2026-4936?: IBM PowerVM Hypervisor Platform KeyStore (PKS) and virtual TPM FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H2 use persistent storage key seeds that result in an AES key with reduced strength. An attacker with access to the service processor or HMC could exploit this weakness to derive the encryption key and access the data.
How severe is CVE-2026-4936?: CVE-2026-4936 has a CVSS 3.x base score of 5.1, rated medium severity. It is exploitable over an adjacent network with high attack complexity, requires high privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-4936 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (1st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4936?: CVE-2026-4936 primarily affects Ibm Power System S1122 (9824-22a) Firmware. In total, 34 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-4936?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2026-4936 published?: CVE-2026-4936 was published on 2026-08-19 and last updated on 2026-08-25.

References

https://www.ibm.com/support/pages/node/7283890

Affected products (34)

cpe:2.3:o:ibm:power_system_s1122_\(9824-22a\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s1122_\(9824-22a\)_firmware:fw1120.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s1124_\(9824-42a\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s1124_\(9824-42a\)_firmware:fw1120.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s1122s_\(9824-22b\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s1122s_\(9824-22b\)_firmware:fw1120.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s1114_\(9824-41b\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s1114_\(9824-41b\)_firmware:fw1120.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_l1122_\(9856-22h\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_l1122_\(9856-22h\)_firmware:fw1120.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_l1124_\(9856-42h\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_l1124_\(9856-42h\)_firmware:fw1120.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_e1150_\(9043-mru\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_e1150_\(9043-mru\)_firmware:fw1120.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s1112_\(9242-21b\)_firmware:fw1120.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s1112_\(9242-21t\)_firmware:fw1120.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_e1080_\(9080-hex\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s1022_\(9105-22a\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s1024_\(9105-42a\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s1022s_\(9105-22b\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s1014_\(9105-41b\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_l1022_\(9786-22h\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_l1024_\(9786-42h\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_e1050_\(9043-mrx\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s1012_\(9028-21b\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_e1180_\(9080-heu\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_e1180_\(9080-heu\)_firmware:fw1120.00:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s922_\(9009-22g\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_h922_\(9223-22s\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s914_\(9009-41g\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_s924_\(9009-42g\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_h924_\(9223-42s\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_e950_\(9040-mr9\)_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:ibm:power_system_e980_\(9080-m9s\)_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Ibm Power System S1122 (9824-22a) Firmware

CVE-2026-17091 — High (CVSS 8.4): IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through…
CVE-2026-11885 — High (CVSS 8.4): IBM PowerVM Hypervisor FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H1 A…
CVE-2026-16933 — High (CVSS 8.2): IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, FW950.00 through…
CVE-2026-16707 — High (CVSS 8.2): IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through…
CVE-2026-16661 — High (CVSS 8.2): IBM PowerVM Hypervisor FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through…
CVE-2026-17494 — High (CVSS 8.2): IBM Power Systems Firmware FW1120.00, and FW1110.00 through FW1110.30 is affected by a vulnerability in the interface…

All CVEs affecting Ibm Power System S1122 (9824-22a) Firmware →

Other CWE-331 vulnerabilities

CVE-2026-13639 — Critical (CVSS 9.8): An insufficient entropy vulnerability in login logic in Synology DiskStation Manager (DSM) before 7.2.1-69057-12,…
CVE-2026-38447 — Critical (CVSS 9.8): osTicket 1.18.3 generates API keys using a predictable construction based on MD5 hashing. The use of MD5, combined with…
CVE-2020-36925 — Critical (CVSS 9.8): Arteco Web Client DVR/NVR contains a session hijacking vulnerability with insufficient session ID complexity that…
CVE-2025-47781 — Critical (CVSS 9.8): Rallly is an open-source scheduling and collaboration tool. Versions up to and including 3.22.1 of the application…
CVE-2024-47945 — Critical (CVSS 9.8): The devices are vulnerable to session hijacking due to insufficient entropy in its session ID generation algorithm.…
CVE-2024-25730 — Critical (CVSS 9.8): Hitron CODA-4582 and CODA-4589 devices have default PSKs that are generated from 5-digit hex values concatenated with a…

Browse all CWE-331 vulnerabilities →