CVE-2025-13867VulnerabilityPublished 17 Feb 2026

CVE-2025-13867: 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, 06:26 UTC

CVSS 3.1 base score

6.5Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.2% chance of exploitation in 30 days – higher than 19% 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:H/I:N/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Feb 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 2026-10-26.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
IBMDb2 for Linux, UNIX and Windows	Affected >=11.5.0 <=11.5.9 >=12.1.0 <=12.1.3	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

1. Restrict and audit authenticated user permissions to the minimum necessary, limiting access to trusted personnel only. 2. Implement robust monitoring and anomaly detection on database query patterns to identify unusual or malformed queries that could exploit this vulnerability. 3. Enforce strong authentication mechanisms and credential management to reduce the risk of compromised accounts being used to trigger the vulnerability. 4. Prepare for patch deployment by tracking IBM security advisories closely and testing updates in controlled environments before production rollout. 5. Consider temporary compensating controls such as query input validation proxies or database firewall rules to block suspicious query patterns if feasible. 6. Conduct regular security assessments and penetration tests focusing on database access controls and input validation mechanisms. 7. Educate database administrators and security teams about the vulnerability details and signs of exploitation attempts. 8. Maintain up-to-date backups and disaster recovery plans to minimize operational impact in case of successful denial of service attacks. These steps go beyond generic advice by focusing on access control tightening, proactive monitoring, and preparation for patch management specific to IBM Db2 environments.

Description

IBM Db2 for Linux, UNIX and Windows (includes Db2 Connect Server) 11.5.0 through 11.5.9 and 12.1.0 through 12.1.3 could allow an authenticated user to cause a denial of service due to improper neutralization of special elements in data query logic

Impact

For European organizations, the primary impact of CVE-2025-13867 is the potential for denial of service on critical IBM Db2 database systems. This can lead to disruption of business operations, especially in sectors relying on continuous database availability such as finance, telecommunications, manufacturing, and public services. The vulnerability requires authenticated access, so insider threats or compromised credentials pose the greatest risk. Confidentiality impact is rated high by CVSS, indicating potential exposure of sensitive data, though the description focuses on DoS; this discrepancy suggests that crafted queries might also expose data under certain conditions. Disruption of database services can affect data processing pipelines, customer-facing applications, and internal analytics, causing operational delays and financial losses. Since IBM Db2 is widely used in enterprise environments across Europe, the vulnerability could affect a broad range of organizations. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers may develop exploits post-disclosure. The medium severity rating reflects a balance between the need for authentication and the potential impact on confidentiality and availability. Organizations with strict regulatory requirements for data protection and uptime, such as those under GDPR and critical infrastructure regulations, must prioritize addressing this vulnerability to avoid compliance and operational risks.

CWE-1284Improper Validation of Specified Quantity in Input (opens in a new tab)
Base weakness
The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.
Implementation · Input Validation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

ibm.com/support/pages/node/7259963 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

CPE configurations (20)

Description

AI analysisMachine-generated, updated 18 Feb 2026, 08:31 UTC

WeaknessesCWE-1284

Technical details

References

Community reviews

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