IBM Concert
CVE-2025-1761
HIGH
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain
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AccessReach exposed IBM Concert endpoint
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ExploitSend crafted request
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ExecutionServer returns uncleared heap memory
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ImpactHarvest residual sensitive data
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Uninitialized pointer prevention
MITRE ATT&CK
1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Exploitation Conditions | No special configuration is required per the CVSS vector - remote unauthenticated exploitation (AV:N/PR:N/UI:N) against a network-reachable IBM Concert instance running versions 1.0.0 through 1.1.0. The practical limiter is not access but yield: because the flaw leaks improperly cleared heap memory, an attacker obtains whatever residual data happens to reside in reused buffers, which is opportunistic and non-deterministic rather than a targeted read of a chosen secret. Exposure also depends on the Concert endpoint being reachable by the attacker, which in most enterprise deployments is internal/restricted rather than internet-facing. |
| Impact | All exploitation signals point to low real-world priority despite the 7.5 CVSS. The vendor CVSS vector (AV:N/AC:L/PR:N/UI:N/C:H/I:N/A:N) describes an unauthenticated, network-reachable information-disclosure flaw, which is why the base score lands in the High band, but EPSS is only 0.03% (10th percentile), there is no CISA KEV listing, and no public exploit code has been identified. SSVC-style reading: exploitation status is 'none observed', the flaw is not obviously automatable (leaking residual heap bytes is probabilistic and low-yield), and technical impact is partial (confidentiality-only, no integrity or availability effect). The C:H rating is arguably generous - 'sensitive information from allocated memory due to improper clearing of heap memory' typically yields opportunistic, fragmentary leakage rather than reliable disclosure of specific secrets, so the practical confidentiality impact may be closer to Low; verify the nature of leaked data with IBM advisory node/7244230. Net: a legitimate patch-worthy bug but not an urgent, actively-exploited threat. |
| Exploit ScenarioDerived | A remote, unauthenticated attacker sends crafted requests to an exposed IBM Concert instance and receives responses that include uninitialized or improperly cleared heap memory, potentially disclosing residual data such as fragments of other users' requests, tokens, or internal structures. No public proof-of-concept exists, and because the leaked content is residual heap data the yield is opportunistic rather than deterministic. |
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Alert meAnalysisAIv2 – Sep 30, 2026
IBM Concert Software versions 1.0.0 through 1.1.0 fail to properly clear heap memory before reusing it, allowing a remote, unauthenticated attacker to read residual data left behind by prior allocations. The weakness is a memory-handling defect (CWE-824) reachable over the network with no authentication or user interaction per the assessed vector (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N), though the leak is opportunistic - an attacker receives whatever happens to be in the reused buffer rather than a chosen secret, which is why the assessed confidentiality impact is Low rather than the 7.5 High-integrity NVD score. Exploitation signals are weak: EPSS is 0.03% (10th percentile), the issue is not listed in CISA KEV, and no public exploit code has been identified at time of analysis, so real-world priority is low and exposure mainly depends on whether a Concert instance is reachable by untrusted networks.
Earlier versions of this analysis (1)
IBM Concert Software 1.0.0 through 1.1.0 could allow a remote attacker to obtain sensitive information from allocated memory due to improper clearing of heap memory. Rated medium severity (CVSS 5.9), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
RemediationAI
No vendor-released patch version is identified in the available intelligence data, so the first action is to confirm fix status and the exact remediated build directly from IBM's advisory at https://www.ibm.com/support/pages/node/7244230 (or via IBM Support/PSIRT) before scheduling an upgrade. Until a fixed release is confirmed, apply compensating controls: restrict which networks can reach Concert endpoints by fronting the service with an allowlisting reverse proxy or firewall rule and requiring VPN or bastion access for remote users - this removes the AV:N path entirely but degrades remote usability and requires accurate inventory of clients. If the service must remain broadly reachable, terminate and restart Concert instances on a schedule to limit the lifetime of stale heap contents, and monitor for anomalous or unusually large responses from Concert endpoints that could indicate memory-scraping attempts; these measures reduce but do not eliminate leakage and add operational overhead. Do not rely on generic JVM or OS memory-scrubbing flags as a substitute for vendor remediation, and note that because the leak is opportunistic, restricting reachability is the most reliable risk reduction available in the absence of a confirmed patch.
Affects your stack
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Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
The root cause class is CWE-824 (Access of Uninitialized Pointer) applied to heap memory that is recycled without being zeroed or otherwise scrubbed before the application hands it back or processes it. In practice this means objects or buffers freed and reallocated by the IBM Concert runtime may still contain remnants of earlier operations - strings, tokens, configuration values, or partial request data - and those remnants can be surfaced in application output or responses. Because the data returned is determined by allocation history rather than by the attacker, the read is non-deterministic and repeatable leakage of a specific target value cannot be guaranteed. IBM Concert is covered by the CPE cpe:2.3:a:ibm:concert:*:*:*:*:*:*:*:*, whose wildcard version field matches all releases of the product in NVD's catalog, so the version constraint in the description (1.0.0 through 1.1.0) is the authoritative scope rather than the CPE alone. Note the cross-source disagreement on impact: NVD scores confidentiality High (7.5) while the independent assessment rates it Low, consistent with an opportunistic memory-disclosure primitive that yields whatever data previously occupied the buffer.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Remote unauthenticated read of residual heap memory with no integrity/availability effect; downgraded to C:L because leaked data is opportunistic residual bytes, not reliably sensitive.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
4DescriptionNVD
IBM Concert Software 1.0.0 through 1.1.0 could allow a remote attacker to obtain sensitive information from allocated memory due to improper clearing of heap memory.
Executive ViewAI
IBM Concert Software versions 1.0.0 through 1.1.0 contain a heap memory handling defect that may let a remote, unauthenticated party read residual data left in memory reused by the application. The practical risk is bounded: any leaked content is opportunistic rather than a targeted secret, exploitation signals are currently weak, and exposure depends almost entirely on whether a Concert deployment is reachable from untrusted networks. Leadership should care because no vendor patch is available yet, so risk reduction depends on our own containment actions and on tracking IBM's remediation timeline.
No vendor-released patch identified at time of analysis. Interim mitigations: restrict network access to affected IBM Concert instances (versions 1.0.0 through 1.1.0) to trusted internal networks or VPN only, keep instances off the public internet, apply network segmentation or virtual patching/WAF rules where feasible, and enable logging and monitoring on those systems to detect anomalous unauthenticated access attempts.
Threat Intelligence Overview
NVD
CVE.org
EPSS
VulDB
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.
Affected Products (CPE)NVD
Unauthenticated remote code execution in IBM Concert 1.0.0 through 3.0.0 lets any attacker who can reach the service sen
Use-after-free in IBM Concert 1.0.0 through 3.0.0 lets an attacker who can influence program input or execution flow cor
IBM Concert Software 1.0.0, 1.0.1, 1.0.2, and 1.0.2.1 is vulnerable to SQL injection. Rated critical severity (CVSS 9.8)
IBM Concert 1.0.0 and 1.0.1 vulnerable to attacks that rely on the use of cookies without the SameSite attribute. Rated
Improperly scoped role-based access control in IBM Concert 1.0.0 through 3.0.0 lets any authenticated user holding even
SQL injection in IBM Concert versions 1.0.0 through 2.3.1 allows remote attackers to inject specially crafted SQL statem
Concert versions up to 2.1.0 is affected by unrestricted upload of file with dangerous type (CVSS 8.8).
IBM Concert Software 1.0.0, 1.0.1, 1.0.2, and 1.0.2.1 could allow an authenticated user to perform unauthorized actions
Improper bounds checking in IBM Concert 1.0.0 through 3.0.0 lets a local, authenticated user supply overlong input that
Local code execution in IBM Concert 1.0.0 through 2.1.0 allows an authenticated attacker to overflow a stack buffer and
Local privilege escalation in IBM Concert 1.0.0 through 3.0.0 lets an attacker who already holds a low-privileged accoun
Heap memory corruption in IBM Concert 1.0.0 through 3.0.0 lets an attacker who already has low-privileged local access t
GitHub PoC
Exploit-DB