CVE-2025-20347VulnerabilityPublished 27 Aug 2025

CVE-2025-20347: Cisco Data Center Network Manager · Protection Mechanism Failure

Affects Cisco Data Center Network ManagerSource CVE Database V5

Not known to be exploited · CVSS 5.4 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

5.4Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 16% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Attack Vector: Network
Attack Complexity: Low
Privileges Required: Low
User Interaction: None
Scope: Unchanged
Confidentiality: Low
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: Low: The attacker is authorized with (i.e., requires) privileges that provide basic user capabilities that could normally affect only settings and files owned by a user. Alternatively, an attacker with Low privileges may have the ability to cause an impact only to non-sensitive resources.
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: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to 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 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 2026-10-25.

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 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
Cisco Cisco Data Center Network Manager	Affected =11.2 =7.0 =10.1 =7.2 =11.0 =10.4 =10.2 =7.1 =12.1 =11.1 =10.3 =10.0 =11.4 =11.3 =11.5 =12.0.1 =12.0.2 =12.1.1 =12.1.2 =12.1.3 =12.2.1 =12.2.2 =12.2.3	Fixed in–

AI-suggested

European organizations should prioritize the following specific mitigation steps: 1) Conduct an immediate inventory of Cisco DCNM and Nexus Dashboard deployments to identify affected versions. 2) Restrict access to the REST API endpoints by implementing strict network segmentation and access control lists (ACLs) to limit API access only to trusted management hosts and administrators. 3) Enforce strong authentication mechanisms, including multi-factor authentication (MFA), for all users accessing the DCNM interfaces to reduce the risk of credential compromise. 4) Monitor API usage logs and network traffic for anomalous or unauthorized API requests that could indicate exploitation attempts. 5) Engage with Cisco support channels to obtain and apply any available patches or updates addressing this vulnerability as soon as they are released. 6) If patches are not yet available, consider temporary compensating controls such as disabling vulnerable API endpoints if feasible or deploying web application firewalls (WAFs) with custom rules to block suspicious API calls. 7) Regularly review and update user privileges to ensure least privilege principles are enforced, minimizing the number of users with access to sensitive API functions. 8) Conduct security awareness training for administrators to recognize and report suspicious activities related to network management systems.

Description

A vulnerability in the REST API endpoints of Cisco Nexus Dashboard and Cisco Nexus Dashboard Fabric Controller (NDFC) could allow an authenticated, low-privileged, remote attacker to view sensitive information or upload and modify files on an affected device. This vulnerability exists because of missing authorization controls on some REST API endpoints. An attacker could exploit th vulnerability by sending crafted API requests to an affected endpoint. A successful exploit could allow the attacker to perform limited Administrator functions, such as accessing sensitive information regarding HTTP Proxy and NTP configurations, uploading images, and damaging image files on an affected device.

Impact

For European organizations, the impact of this vulnerability can be significant, especially for enterprises and service providers relying on Cisco Data Center Network Manager for managing their data center infrastructure. Unauthorized access to sensitive configuration data such as HTTP Proxy and NTP settings could lead to information disclosure, enabling attackers to map network infrastructure or manipulate time synchronization, which is critical for security logging and operations. The ability to upload or damage image files could disrupt network device functionality, causing operational downtime or degraded performance. Given the central role of DCNM in managing Cisco Nexus switches and fabric controllers, exploitation could cascade into broader network instability or facilitate lateral movement within the network. This risk is heightened in sectors with critical infrastructure, financial services, telecommunications, and large enterprises prevalent in Europe. The requirement for authenticated access reduces the risk somewhat but does not eliminate it, as credential theft or misuse remains a common attack vector. The absence of known exploits currently provides a window for proactive mitigation before active exploitation emerges.

References

sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nshs-urapi-gJuBVFpu (opens in a new tab)

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 27 Aug 2025, 16:48 UTC

Technical details

References

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