Vulnerability · Published Sep 24, 2026 · Assigned by ibm

CVE-2026-18857This Power System update is being released to address

Low 3.4

In plain English

A low-severity out-of-bounds read in OPENBMC from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).

Severity (CVSS 3.1)3.4Low

Exploit odds (30 days)0.1%top 98.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

IBM OPENBMC FW1120.00 through FW1120.01, FW1110.00 through FW1110.31, and FW1060.00 through FW1060.81 is affected by a vulnerability in the BMC firmware management interface. The host system can cause the BMC firmware management service to crash or allow a limited amount of BMC internal memory to be read, resulting in a confidentiality and availability impact to the managed system.

Affected products (as reported)

Vendor	Product	Versions
IBM	OPENBMC	FW1120.00 – through FW1120.01FW1110.00 – through FW1110.31FW1060.00 – through FW1060.81

Weakness: CWE-125 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:L

References

https://www.ibm.com/support/pages/node/7289253 vendor-advisory, patch