CVE-2025-36407: IBM Db2 for Linux, UNIX and Windows · Improper Validation of Specified Quantity in Input
Affects IBM Db2 for Linux, UNIX and WindowsSource CVE Database V5
Not known to be exploited · CVSS 6.5 Medium.
Data as of 26 Oct 2026, 14:05 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 23% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 30 Jan 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| IBMDb2 for Linux, UNIX and Windows | Affected
| Fixed in– |
CPE configurations (20)
cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:linux:*:*cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:unix:*:*cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:aix:*:*cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:windows:*:*cpe:2.3:a:ibm:db2:11.5.0:*:*:*:*:zos:*:*cpe:2.3:a:ibm:db2:11.5.9:*:*:*:*:linux:*:*
AI-suggested
- Monitor IBM’s security advisories closely and apply patches or updates for Db2 versions 11.5.0 and 12.1.0 as soon as they become available.
- Restrict ALTER TABLE permissions strictly to trusted database administrators to minimize the attack surface.
- Implement network segmentation and firewall rules to limit access to Db2 servers only to authorized users and systems.
- Employ database activity monitoring tools to detect unusual ALTER TABLE queries or patterns indicative of exploitation attempts.
- Conduct regular security audits and vulnerability assessments on database environments to identify and remediate configuration weaknesses.
- Consider deploying failover and high availability configurations to reduce downtime impact in case of a DoS event.
- Educate database administrators on secure query practices and the risks associated with schema modification commands.
- If possible, temporarily disable or limit ALTER TABLE operations during periods of heightened threat until patches are applied.
Description
IBM® Db2® is vulnerable to a denial of service with a specially crafted query that uses ALTER TABLE operations.