CVE-2026-16832 — Stack-based Buffer Overflow in Ibm Power System E1080 (9080-hex) Firmware
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.
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
How the score was calculated
- Technical severity (high)+6
The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.
Remediation
Fixes and mitigations documented by the sources — linked to the original advisory.
No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.
First 24 hours
Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.
- Identify exposed assets running the affected vendor/product/version combinations (Ibm Power System E1080 (9080-hex) Firmware, Ibm Power System E1180 (9080-heu) Firmware, Ibm Power System E950 (9040-mr9) Firmware…).
- No fix documented in the sources: reduce exposure and monitor the vendor advisory.
- Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Ibm | Power System E1080 (9080-hex) Firmware | ≥ fw1060.00 and < fw1060.81 | Vulnerable | NIST National Vulnerability Database |
| Ibm | Power System E1180 (9080-heu) Firmware | ≥ fw1110.00 and < fw1110.31version fw1120.00 | Vulnerable | NIST National Vulnerability Database |
| Ibm | Power System E950 (9040-mr9) Firmware | ≥ fw950.00 and < fw950.h3 | Vulnerable | NIST National Vulnerability Database |
| Ibm | Power System E980 (9080-m9s) Firmware | ≥ fw950.00 and < fw950.h3 | Vulnerable | NIST National Vulnerability Database |
| Ibm | Power System H922 (9223-22s) Firmware | ≥ fw950.00 and < fw950.h3 | Vulnerable | NIST National Vulnerability Database |
| Ibm | Power System H924 (9223-42s) Firmware | ≥ fw950.00 and < fw950.h3 | Vulnerable | NIST National Vulnerability Database |
| Ibm | Power System S914 (9009-41g) Firmware | ≥ fw950.00 and < fw950.h3 | Vulnerable | NIST National Vulnerability Database |
| Ibm | Power System S922 (9009-22g) Firmware | ≥ fw950.00 and < fw950.h3 | Vulnerable | NIST National Vulnerability Database |
| Ibm | Power System S924 (9009-42g) Firmware | ≥ fw950.00 and < fw950.h3 | Vulnerable | NIST National Vulnerability Database |
Attack characteristics
The CVSS vector, decoded. It describes the attack, not your exposure to it.
Every base score collected
Sources score independently and may disagree; each row says who scored it and under which version.
| Score | Version | Severity | Expl. | Impact | Scored by |
|---|---|---|---|---|---|
| 8.4 | CVSS 3.1 | High | 1.7 | 6.0 | psirt@us.ibm.com via NIST National Vulnerability Database |
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H (score shown at the top: psirt@us.ibm.com) Weakness MITRE
Weakness class according to MITRE’s CWE catalog.
Detection
Read off the CVSS vector and the weakness class. Starting points, not tested rules.
- Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.
Timeline
What happened to this CVE, newest first.
- 2026
- Record published
- CVSS changed · 8.4
- Source status changed · → Analyzed
- Record created in this database
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 1× Official description updated · Oct 15, 2026 – Oct 15, 2026
References
1 on the record
Elsewhere on this site
Related CVEs (same products)
- High CVE-2026-93306 This Power System update is being released to address 20d
- Low CVE-2026-19492 This Power System update is being released to address 21d
- Medium CVE-2026-18870 This Power System update is being released to address 21d
- Medium CVE-2026-17504 This Power System update is being released to address 21d
- Low CVE-2026-17511 This Power System update is being released to address 21d
- Medium CVE-2026-17503 This Power System update is being released to address 21d
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No FIRST EPSS score.
- No fixed version, patch or mitigation documented.
- No CISA SSVC assessment.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.
Answered from this record
Text assembled only from the fields above — no additional claims.
What should defenders know first?
CVE-2026-16832 is "Stack-based Buffer Overflow in Ibm Power System E1080 (9080-hex) Firmware", rated High. It affects Power System E1080 (9080-hex) Firmware (Ibm); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 8.4 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.
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