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Cisco ISE EUVDEUVD-2026-81145

| CVE-2026-76428 MEDIUM
SQL Injection (CWE-89)
2026-09-16 cisco GHSA-v3qp-3mjr-g4hr
4.9
CVSS 3.1 · Vendor: cisco
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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata – not a confirmed exploit chain

  1. Access
    Obtain valid ISE admin credentials
  2. Exploit
    Send crafted REST API request with SQL in parameter
  3. Execution
    Injected SQL executes against session DB
  4. Impact
    Read session database records

Vulnerability Assessment

Weakness
CWE
OWASP Top 10:2025
A05:2025 - Injection
ASVS 5.0
V1 - Encoding and Sanitization Parameterized queries, prepared statements
MITRE ATT&CK

2 techniques across 2 tactics: Initial Access, Persistence

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

Exploitation Conditions

Requires valid administrative credentials for Cisco ISE or ISE-PIC (PR:H) - the description explicitly states 'the attacker must have valid administrative credentials.' Exploitation is network-remote against the REST APIs (AV:N) with low complexity (AC:L) and no user interaction, but is gated entirely by prior administrative authentication. Affected: Cisco ISE and ISE-PIC releases 3.1 through 3.5. Impact is limited to reading the session database (C:H, no write or availability impact). The high-privilege prerequisite is the dominant limiting factor: only an actor who already has admin access can exploit it, reducing this to a post-authentication data-disclosure/escalation concern rather than an initial-access vector.

Impact

This is a genuinely lower-priority issue despite affecting a critical enterprise product. The CVSS 3.1 vector (AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N, base 4.9 Medium) tells the real story: PR:H means the attacker must already hold valid administrative credentials, which sharply narrows the realistic threat population. Impact is confidentiality-only (C:H, I:N, A:N) - the flaw permits reading from the session database but no data modification or availability loss, consistent with the description's 'read information from the session database.' No EPSS score, no CISA KEV listing, and no public POC were provided, so there is no signal of active or imminent exploitation. There is no SSVC data supplied. The signals are internally consistent: a network-reachable but high-privilege, read-only SQL injection. The main caveat is the semantic mismatch typical of these authenticated flaws - an admin already able to query ISE via authorized means gains limited additional value from SQLi, so the practical risk is post-compromise data exfiltration or lateral escalation rather than initial access. Contrast with the unauthenticated ISE SQLi CVE-2026-20247 (PR:N), which is a far higher real-world priority.

Exploit ScenarioDerived

An attacker who has already obtained valid ISE administrative credentials (via phishing, credential reuse, or an insider) sends a crafted REST API request embedding SQL statements in a vulnerable, unparameterized parameter. The injected SQL executes against the session database, letting the attacker read session records beyond what the API normally exposes. No public exploit code was identified at time of analysis, and successful use requires the attacker to first hold administrative access.

This Month Plan within 30 days. Why: MEDIUM severity (CVSS 4.0-6.9).
No patch listed yet 0.4% exploitation probability (EPSS)

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AnalysisAIv1 – Sep 16, 2026

SQL injection in the REST APIs of Cisco Identity Services Engine (ISE) and the ISE Passive Identity Connector (ISE-PIC) allows an attacker who already holds valid administrative credentials to read information from the session database, with no integrity or availability impact. The vector is network-reachable, low complexity, and requires no user interaction, but the PR:H prerequisite confines this to a post-authentication data-disclosure/escalation concern rather than an initial-access vector. No public exploit code has been identified at time of analysis and there is no evidence of active exploitation; given the administrative credential requirement and read-only impact, this is a lower-priority issue despite the criticality of the affected product.

RemediationAI

No vendor-released patch is identified in the available data, so the authoritative next step is to review the Cisco Security Advisory (https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multi-hrP9jQSQ) for the fixed software release for each affected train and upgrade ISE and ISE-PIC accordingly - Cisco advisories of this type typically publish per-train fixed versions and workarounds in the 'Fixed Software' and 'Workarounds' sections, and given the breadth of builds listed, plan upgrades from 3.1/3.2 first as those are older trains. Until a fixed release is applied, treat this as an insider/post-authentication risk and reduce the blast radius of a compromised admin account: enforce least-privilege RBAC in ISE so that only the small set of super-admin accounts that genuinely need full access can reach the vulnerable REST API endpoints, and split day-to-day administration into lower-privilege roles (trade-off: some operational workflows will require re-authorization under elevated accounts). Restrict administrative access to the ISE REST APIs on TCP 443 to trusted management networks, jump hosts or a VPN/ACL boundary so a stolen credential alone is not sufficient from an arbitrary network position (trade-off: adds a hop for administrators and mandates ACL maintenance). Disable or lock unused and stale administrative accounts and rotate credentials for any account with full admin rights, since the exploit requires valid administrative credentials. Because exploitation is read-only against the session database, treat suspicious read patterns as a detection opportunity: monitor ISE admin audit logs and REST API access logs for anomalous or unrecognized query parameters from administrative accounts, and forward them to a SIEM for correlation (trade-off: high-volume audit logging requires tuning to avoid noise). Note that these are compensating controls, not fixes - they reduce exposure and detect abuse but do not remove the underlying SQL injection flaw.

Affected VersionsENISA

Cisco Identity Services Engine Software 3.2.0 p6
Cisco Identity Services Engine Software 3.1.0 p72
Cisco Identity Services Engine Software 3.3 Patch 12
Cisco Identity Services Engine Software 3.3 Patch 4
Cisco Identity Services Engine Software 3.4 Patch 4
Cisco Identity Services Engine Software 3.3 Patch 1
Cisco Identity Services Engine Software 3.1.0 p6
Cisco Identity Services Engine Software 3.1.0
Cisco ISE Passive Identity Connector 3.5.0
Cisco Identity Services Engine Software 3.4 Patch 1
Cisco Identity Services Engine Software 3.3 Patch 3
Cisco Identity Services Engine Software 3.4.0
Cisco Identity Services Engine Software 3.1.0 p1
Cisco Identity Services Engine Software 3.3.0
Cisco ISE Passive Identity Connector 3.3.0
Cisco Identity Services Engine Software 3.1.0 p11
Cisco ISE Passive Identity Connector 3.4.0
Cisco Identity Services Engine Software 3.5.0
Cisco Identity Services Engine Software 3.5 Patch 2
Cisco Identity Services Engine Software 3.4 Patch 2
Cisco Identity Services Engine Software 3.2 Patch 8
Cisco Identity Services Engine Software 3.3 Patch 9
Cisco Identity Services Engine Software 3.4 Patch 5
Cisco Identity Services Engine Software 3.3 Patch 11
Cisco ISE Passive Identity Connector 3.1.0
Cisco Identity Services Engine Software 3.4 Patch 3
Cisco Identity Services Engine Software 3.1.0 p10
Cisco ISE Passive Identity Connector 3.2.0
Cisco Identity Services Engine Software 3.1.0 p9
Cisco Identity Services Engine Software 3.1.0 p8
Cisco Identity Services Engine Software 3.2 Patch 9
Cisco Identity Services Engine Software 3.4 Patch 6
Cisco Identity Services Engine Software 3.1.0 p7
Cisco Identity Services Engine Software 3.3 Patch 8
Cisco Identity Services Engine Software 3.2.0 p7
Cisco Identity Services Engine Software 3.2.0 p3
Cisco Identity Services Engine Software 3.2.0 p5
Cisco Identity Services Engine Software 3.1.0 p5
Cisco Identity Services Engine Software 3.3 Patch 7
Cisco Identity Services Engine Software 3.1.0 p4
Cisco Identity Services Engine Software 3.1.0 p3
Cisco Identity Services Engine Software 3.3 Patch 10
Cisco Identity Services Engine Software 3.2.0 p1
Cisco Identity Services Engine Software 3.3 Patch 2
Cisco Identity Services Engine Software 3.2 Patch 10
Cisco Identity Services Engine Software 3.2.0 p2
Cisco Identity Services Engine Software 3.2.0
Cisco Identity Services Engine Software 3.1.0 p2
Cisco Identity Services Engine Software 3.2.0 p4
Cisco Identity Services Engine Software 3.5 Patch 3
Cisco Identity Services Engine Software 3.5 Patch 1
Cisco Identity Services Engine Software 3.3 Patch 6
Cisco Identity Services Engine Software 3.3 Patch 5

Affected Packages

euvd cisco_identity_services_engine_software no fix
euvd cisco_ise_passive_identity_connector no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 2 packages in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

The root cause is CWE-89 (SQL Injection): certain REST API parameters are concatenated directly into SQL clauses instead of being bound through parameterized statements or prepared queries, so attacker-supplied input is interpreted as SQL syntax by the session database backend. Because the query targets the session database, a successful injection yields read access to session records rather than code execution or persistent modification - the CVSS vector reflects exactly this with C:H alongside I:N/A:N. The affected CPE identifiers are cpe:2.3:a:cisco:cisco_identity_services_engine_software and cpe:2.3:a:cisco:cisco_ise_passive_identity_connector (both version-wildcarded, indicating the whole product line is in scope per the vendor record), while ENISA EUVD enumerates specific impacted builds across the 3.1, 3.2, 3.3, 3.4 and 3.5 release trains of both ISE and ISE-PIC. ISE is a network access control and identity platform that holds authentication, authorization and accounting state along with session metadata (endpoint identities, MAC and IP mappings, posture and profiler data), so the session database is sensitive reconnaissance material for an actor already sitting in an administrative position. The high-privilege prerequisite (PR:H) is the dominant limiting factor: this is not a path to obtain administrative access, but a mechanism by which an existing administrator - or someone who has compromised an administrative account - can exfiltrate data beyond what the UI/API normally exposes.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (cisco) PRIMARY 4.9 MEDIUM
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
vuln.today AI 4.9 MEDIUM

Network REST API and low complexity, but valid administrative credentials required (PR:H); read-only session-DB disclosure gives C:H with I:N/A:N.

3.1 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (cisco).

CVSS VectorVendor: cisco

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

DescriptionCVE.org

A vulnerability in the REST APIs of Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to conduct SQL injection attacks against the session database.

This vulnerability is due to certain parameters being concatenated directly into SQL clauses without parameterization. An attacker could exploit this vulnerability by sending a crafted request that contains SQL statements in one of the affected parameters. A successful exploit could allow the attacker to read information from the session database. To exploit this vulnerability, the attacker must have valid administrative credentials.

Threat Intelligence Overview

EPSS Score
0.4%
Top 69% exploitable
Prevalence
High
Cisco ISE is a ubiquitous enterprise NAC/AAA platform in large networks
Data Quality
4 sources
Confidence: Medium

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.

SignalValue
Severity MEDIUM
CISA KEV No
Public POC No
EPSS 0.4%
Patch available No
Active threat No
Deciding rule
MEDIUM severity (CVSS 4.0-6.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

24
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +24
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

SQL injection exploits the way applications construct database queries by mixing user input directly into SQL statements.

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Command injection in Cisco Identity Services Engine (ISE) lets an authenticated remote attacker holding only Read-Only A

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Authenticated remote command execution in Cisco Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-P

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SQL injection in the SXP REST API of Cisco Identity Services Engine (ISE) lets a remote attacker who already holds valid

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Command injection in Cisco Identity Services Engine (ISE) allows an authenticated, high-privileged remote administrator

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Cisco Identity Services Engine (ISE) and ISE Passive Identity Connector (ISE-PIC) contain multiple internally discovered

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