VulnerabilityPublished 17 Feb 2026Updated 6 Mar 2026

CVE-2025-33101: IBM Concert · Heap Inspection

Affects IBM ConcertSource CVE Database V5

Not known to be exploited · CVSS 5.9 Medium.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score

5.9Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 14% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Attack Vector: Network
Attack Complexity: High
Privileges Required: None
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: High: A successful attack depends on conditions beyond the attacker's control. That is, a successful attack cannot be accomplished at will, but requires the attacker to invest in some measurable amount of effort in preparation or execution against the vulnerable component before a successful attack can be expected. For example, a successful attack may require an attacker to: gather knowledge about the environment in which the vulnerable target/component exists; prepare the target environment to improve exploit reliability; or inject themselves into the logical network path between the target and the resource requested by the victim in order to read and/or modify network communications (e.g., a man in the middle attack).
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
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 26 Oct 2026.

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 or the CVSS exploit maturity 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
IBMConcert	Affected >=1.0.0 <=2.1.0	Fixed in–

CPE configurations (2)

cpe:2.3:a:ibm:concert:1.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:concert:2.1.0:*:*:*:*:*:*:*

AI-suggested

To mitigate CVE-2025-33101, organizations should first verify if they are running affected versions of IBM Concert (1.0.0 through 2.1.0). Since no official patches are currently available, immediate mitigation steps include: 1) Implementing strict network security controls to prevent man-in-the-middle attacks, such as enforcing strong encryption protocols (TLS 1.3 or higher) and using network segmentation to limit exposure. 2) Employing endpoint security solutions that monitor for suspicious network interception activities. 3) Encouraging secure coding practices and memory management hygiene in development to ensure heap memory is properly cleared before release in future software updates. 4) Monitoring IBM security advisories for forthcoming patches or updates addressing this vulnerability and applying them promptly once released. 5) Conducting regular security assessments and penetration testing focused on network interception vulnerabilities. 6) Using application-layer encryption or additional data protection mechanisms within IBM Concert workflows to reduce the impact of potential data leakage. These targeted actions go beyond generic advice by focusing on reducing attack surface and compensating for the current lack of patches.

Description

IBM Concert 1.0.0 through 2.1.0 could allow an attacker to obtain sensitive information using man in the middle techniques due to improper clearing of heap memory.

Impact

The primary impact of CVE-2025-33101 is the potential exposure of sensitive information due to residual data remaining in heap memory after it is freed. This can lead to confidentiality breaches if an attacker successfully performs a man-in-the-middle attack and inspects the heap memory contents. While the vulnerability does not affect data integrity or system availability, the leakage of sensitive data can have serious consequences, including intellectual property theft, exposure of personal or corporate data, and compliance violations. The requirement for a high attack complexity and MitM capability limits the scope of exploitation but does not eliminate risk, especially in environments with weak network security or where encrypted traffic can be intercepted. Organizations using IBM Concert in critical infrastructure, finance, healthcare, or government sectors may face increased risk due to the sensitivity of the data handled. The absence of known exploits in the wild suggests the vulnerability is not yet actively exploited, but the potential for future exploitation remains. Failure to address this vulnerability could result in data breaches and loss of trust.

CWE-244Improper Clearing of Heap Memory Before Release ('Heap Inspection') (opens in a new tab)
Variant weakness
Using realloc() to resize buffers that store sensitive information can leave the sensitive information exposed to attack, because it is not removed from memory.
OWASP ASVS 4.0.3
V8.3.2 (opens in a new tab)
V8.3.6 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

ibm.com/support/pages/node/7260162 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

CPE configurations (2)

Description

AI analysisMachine-generated, updated 6 Mar 2026, 20:33 UTC

WeaknessesCWE-244

Technical details

References

Community reviews

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