VulnerabilityPublished 27 Aug 2025

CVE-2025-20317: Cisco Unified Computing System (Managed) · Open Redirect

Affects Cisco Unified Computing System (Managed)Source CVE Database V5

Not known to be exploited · CVSS 7.1 High.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score

7.1High

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

EPSS: 0.4% chance of exploitation in 30 days – higher than 38% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Unchanged
Confidentiality: High
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: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
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: 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 27 Aug 2025
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

AI-suggested

Immediate application of Cisco's security updates or patches for all affected UCS and IMC versions as soon as they become available is paramount.
Implement strict URL filtering and web proxy controls to detect and block suspicious or crafted URLs that could exploit the open redirect vulnerability.
Enhance user awareness training focused on recognizing phishing attempts and suspicious links, especially for personnel with access to UCS management consoles.
Restrict access to Cisco UCS management interfaces to trusted networks and use VPNs or zero-trust network access (ZTNA) solutions to minimize exposure.
Enable multi-factor authentication (MFA) on all management interfaces to reduce the risk of credential compromise leading to unauthorized access.
Monitor logs and network traffic for unusual redirect patterns or access attempts to the vKVM client interfaces.
Consider implementing web application firewalls (WAFs) or intrusion detection/prevention systems (IDS/IPS) with rules tailored to detect exploitation attempts of open redirect vulnerabilities.
Regularly review and update endpoint security policies to ensure that client devices accessing UCS management consoles are hardened and monitored.

Description

A vulnerability in the Virtual Keyboard Video Monitor (vKVM) connection handling of Cisco Integrated Management Controller (IMC) could allow an unauthenticated, remote attacker to redirect a user to a malicious website. This vulnerability is due to insufficient verification of vKVM endpoints. An attacker could exploit this vulnerability by persuading a user to click a crafted link. A successful exploit could allow the attacker to redirect a user to a malicious webpage and potentially capture user credentials. Note: The affected vKVM client is also included in Cisco UCS Manager.

Impact

For European organizations, the impact of CVE-2025-20317 can be substantial, especially for enterprises and service providers relying on Cisco UCS infrastructure for critical data center operations. Successful exploitation could lead to credential compromise, enabling attackers to gain unauthorized access to management consoles or other sensitive systems. This could facilitate further lateral movement, data exfiltration, or disruption of services. Given the role of Cisco UCS in managing server hardware and virtualization environments, compromised credentials could undermine the confidentiality and security of hosted applications and data. Additionally, phishing campaigns leveraging this vulnerability could erode user trust and lead to regulatory compliance issues under GDPR, particularly if personal data is exposed. The requirement for user interaction means that social engineering defenses and user awareness are critical factors in risk mitigation. The absence of known exploits in the wild currently provides a window for proactive patching and mitigation before widespread attacks occur.

References

sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ucs-vkvmorv-CnKrV7HK (opens in a new tab)

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Exploitation evidence

What to do

Description

AI analysisMachine-generated, updated 27 Aug 2025, 16:47 UTC

Technical details

References

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