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NVD / CVE Program· CNA ibm

CVE-2026-18681: This Power System Buffer Overflow

MediumCVSS 6.8 · v3.1—No exploit No fix recorded

Noroxi assessment

Priority: Monitor (action score 27/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.33% (FIRST EPSS).
  • Someone on the same network segment can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Low priority for now. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

IBM Server 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 firmware update process. An attacker with authenticated administrator-level access to the FSP can, under specific conditions, execute arbitrary code, resulting in a confidentiality, integrity, and availability impact.

Published
Aug 19, 2026
Updated
Aug 25, 2026
EPSS
0.3% · 27th percentile

Report tools

JSON

Action score

27

Monitor

Low priority for now.

CVSS
27 / 40 · 6.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · ibm
6.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-18681

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
ibmpower system s922 \(9009-22g\) firmware
ibmpower system s922 \(9009-22g\)
ibmpower system h922 \(9223-22s\) firmware
ibmpower system h922 \(9223-22s\)
ibmpower system s914 \(9009-41g\) firmware
ibmpower system s914 \(9009-41g\)
ibmpower system s924 \(9009-42g\) firmware
ibmpower system s924 \(9009-42g\)
ibmpower system h924 \(9223-42s\) firmware
ibmpower system h924 \(9223-42s\)
ibmpower system e950 \(9040-mr9\) firmware
ibmpower system e950 \(9040-mr9\)

and 6 more

Versions reported by the vendor

Affected version ranges reported by the assigning authority (ibm). Independent of NVD's CPE analysis and usually ahead of it.

  • IBM Server Firmware

    • FW1120.00affected
    • FW1110.00 and later · up to and including FW1110.30affected · semver
    • FW1060.00 and later · up to and including FW1060.80affected · semver
    • FW950.00 and later · up to and including FW950.H2affected · semver
Affected versions · NVD (10)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • ibm power system e1080 (9080-hex) firmwarefw1060.00 and later · before fw1060.81
  • ibm power system e1180 (9080-heu) firmwarefw1110.00 and later · before fw1110.31
  • ibm power system e1180 (9080-heu) firmwarefw1120.00
  • ibm power system e950 (9040-mr9) firmwarefw950.00 and later · before fw950.h3
  • ibm power system e980 (9080-m9s) firmwarefw950.00 and later · before fw950.h3
  • ibm power system h922 (9223-22s) firmwarefw950.00 and later · before fw950.h3
  • ibm power system h924 (9223-42s) firmwarefw950.00 and later · before fw950.h3
  • ibm power system s914 (9009-41g) firmwarefw950.00 and later · before fw950.h3
  • ibm power system s922 (9009-22g) firmwarefw950.00 and later · before fw950.h3
  • ibm power system s924 (9009-42g) firmwarefw950.00 and later · before fw950.h3

Same product

ibm: all records

Other highest-scoring records for the same primary product.

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Bug bounty scope

The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate.

Technical details

Attack conditions

  • Someone on the same network segment can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Adjacent
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-121 · Stack-based Buffer Overflow

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records