Power System Buffer Overflow

published 2026-08-19 2 mo ago modified 2026-08-25 2 mo ago also EUVD-2026-62690

cvss: 8.4; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.3%; EPSS 0.3% chance of exploitation in 30 days, percentile 24%
public exploits: 0; none known

IBM Power Systems Firmware FW1120.00, FW1110.00 through FW1110.30, FW1060.00 through FW1060.80, and FW950.00 through FW950.H2 is affected by a vulnerability in the FSP management network protocol. An attacker with authenticated HMC administrator access can execute arbitrary code on the service processor, giving full control over the managed system, resulting in a confidentiality, integrity, and availability impact.

Patch / fix

fixed in 9 links 1

ibm power_system_e1080_(9080-hex)_firmware fw1060.81
ibm power_system_e1180_(9080-heu)_firmware fw1110.31
ibm power_system_s922_(9009-22g)_firmware fw950.h3
ibm power_system_h922_(9223-22s)_firmware fw950.h3
ibm power_system_s914_(9009-41g)_firmware fw950.h3
ibm power_system_s924_(9009-42g)_firmware fw950.h3
ibm power_system_h924_(9223-42s)_firmware fw950.h3
ibm power_system_e950_(9040-mr9)_firmware fw950.h3
ibm power_system_e980_(9080-m9s)_firmware fw950.h3

ibm.com/support/pages/node/7283895 advisory

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 2 mo ago (2026-08-21)

Exploit prediction

0.32% chance of exploitation in the next 30 days, higher than 24% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	8.4	CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

IBM Power Systems Firmware

Classification

Weakness

CWE-121 Stack-based Buffer Overflow

References

ibm.com /support/pages/node/7283895
vendor-advisory, patch

Sources

CVE List CVE-2026-16832
NVD CVE-2026-16832

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary