VulnerabilityPublished 16 Sep 2026

CVE-2026-76451: Cisco Identity Services Engine (ISE) · CWE-564

Source GCVE Database

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Authoritative record:CVE-2026-76451· Medium 4.9

Not known to be exploited · CVSS 4.9 Medium.

Data as of 31 Oct 2026, 20:20 UTC

CVSS 3.1 base score

4.9Medium

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

EPSS: 0.4% chance of exploitation in 30 days – higher than 36% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: High
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: High
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: High: The attacker is authorized with (i.e., requires) privileges that provide significant (e.g., administrative) control over the vulnerable component that could affect component-wide settings and files.
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: None: There is no loss of confidentiality within the impacted component.
Integrity: High: There is a total loss of integrity, or a complete loss of protection. For example, the attacker is able to modify any/all files protected by the impacted component. Alternatively, only some files can be modified, but malicious modification would present a direct, serious consequence to 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 16 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 31 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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.

ghsa-cjxm-gw2f-9qqj

What to do

Affected software

Product	Affected	Fixed in
CiscoCisco Identity Services Engine Software	Affected 3.1.0 – 3.5.0 5 affected builds	Fixed in–
CiscoCisco ISE Passive Identity Connector	Affected 3.1.0 – 3.5.0 5 affected builds	Fixed in–

AI-suggested

Until a fix is available, restrict administrative access to trusted personnel only and monitor for suspicious activity involving database queries.

Description

CVE-2026-76451 is a medium severity vulnerability in Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) that allows an authenticated remote attacker with administrative credentials to perform SQL or HQL injection attacks. The flaw arises from insufficient validation of user input in APIs used to build database queries. Exploitation could enable unauthorized viewing or modification of database data. No patch or remediation information is provided in the available data.

Impact

An attacker with valid administrative credentials can exploit this vulnerability to execute arbitrary SQL or HQL queries on the affected device's database. This could allow unauthorized modification of data, compromising data integrity. There is no indication of impact on confidentiality or availability. No known exploits are reported in the wild.

Summary

This vulnerability in Cisco ISE and ISE-PIC is caused by inadequate validation of user-supplied input before it is incorporated into database queries, leading to SQL or HQL injection risks. An attacker with valid administrative credentials can send crafted requests to execute arbitrary queries on the underlying database, potentially altering or accessing unauthorized data. The CVSS 3.1 base score is 4.9 (medium), reflecting the requirement for high privileges and lack of impact on confidentiality but high impact on integrity.

CWE-564Use of Hibernate with HQL/SQL Query String Containing External Input (HQL Injection) (opens in a new tab)
Variant weaknessOWASP Top 10 A05:2025: Injection (opens in a new tab)
The product uses Hibernate to execute a dynamic HQL or SQL statement, but the statement is built with user-controlled input.
Requirements
A non-SQL style database that is not subject to this flaw may be chosen.
Architecture and Design
Follow the principle of least privilege when creating user accounts to a SQL database. Users should only have the minimum privileges necessary to use their account.
Architecture and Design
For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks…
OWASP Cheat Sheets
Query Parameterization (opens in a new tab)
Abuse Case (opens in a new tab)
Deserialization (opens in a new tab)
Unvalidated Redirects and Forwards (opens in a new tab)
XML Security (opens in a new tab)
OWASP ASVS 4.0.3
V5.3.4 (opens in a new tab)
V1.5.1 (opens in a new tab)
V5.3.5 (opens in a new tab)
Attack patterns
Object Relational Mapping Injection (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 17 Sep 2026, 02:35 UTC

WeaknessesCWE-564

Technical details

References

Community reviews

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