VulnerabilityPublished 16 Sep 2026

CVE-2026-76433: Cisco Identity Services Engine Software · Path Traversal

Affects Cisco Identity Services Engine SoftwareSource CVE Database V5

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Not known to be exploited · CVSS 5.3 Medium.

Data as of 31 Oct 2026, 20:20 UTC

CVSS 3.1 base score

5.3Medium

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

EPSS: 1.2% chance of exploitation in 30 days – higher than 69% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: Low
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: 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: None: There is no loss of confidentiality within the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on 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.

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 an official fix is available, restrict access to the provisioning download service and monitor for suspicious requests targeting path traversal attempts. Follow Cisco's guidance once published.

Description

CVE-2026-76433 is a medium severity vulnerability in Cisco Identity Services Engine Software versions 3.1.0, 3.2.0, 3.3.0, 3.4.0, and 3.5.0. It involves improper limitation of a pathname to a restricted directory, allowing an unauthenticated remote attacker to perform a path traversal attack via the client provisioning download feature. Exploitation could lead to unauthorized access to protected files, potentially exposing sensitive information. No authentication is required to exploit this vulnerability.

Impact

An unauthenticated remote attacker could access protected files on the affected device, potentially exposing sensitive information. The vulnerability does not allow for confidentiality compromise (C:N), but it impacts integrity (I:L) with no impact on availability (A:N). The attack complexity is low, and no privileges or user interaction are required.

Summary

This vulnerability arises from insufficient validation of directory traversal character sequences in user-supplied paths processed by the provisioning download service of Cisco ISE and Cisco ISE-PIC. An attacker can send a crafted request to this service to access files outside the intended directory scope without authentication. The flaw affects specific versions of Cisco Identity Services Engine Software and could lead to information disclosure.

References

sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multi-traversal-WDTgYCdn (opens in a new tab)

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 24 Sep 2026, 05:34 UTC

Technical details

References

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