VulnerabilityPublished 13 Nov 2025

CVE-2025-20355: Cisco Digital Network Architecture Center (DNA Center) · Open Redirect

Affects Cisco Digital Network Architecture Center (DNA Center)Source CVE Database V5

Not known to be exploited · CVSS 4.7 Medium.

Data as of 26 Oct 2026, 11:42 UTC

CVSS 3.1 base score

4.7Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 18% 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:C/C:N/I:L/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Changed
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: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
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 13 Nov 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

Affected software

Product	Affected	Fixed in
Cisco Cisco Digital Network Architecture Center (DNA Center)	Affected 1.0.0.0 – 2.3.7.9-VA 80 affected builds	Fixed in–

AI-suggested

Apply official Cisco patches or updates as soon as they become available for affected DNA Center versions to address the input validation flaw directly.
Implement strict input validation and sanitization on all HTTP request parameters within the DNA Center interface to prevent open redirect conditions.
Employ web application firewalls (WAFs) with rules designed to detect and block suspicious URL redirection attempts targeting Cisco DNA Center.
Conduct user awareness training focused on recognizing phishing attempts and the risks of clicking unsolicited or suspicious links, especially those purporting to be from network management systems.
Restrict access to Cisco DNA Center management interfaces to trusted networks and users, leveraging VPNs and multi-factor authentication to reduce exposure.
Monitor network traffic and logs for unusual redirection patterns or access attempts that could indicate exploitation attempts.
Use browser security features and endpoint protection solutions that can detect and block navigation to known malicious domains.
Regularly review and audit Cisco DNA Center configurations and access controls to minimize attack surface and ensure compliance with security best practices.

Description

CVE-2025-20355 is an open redirect vulnerability in Cisco Digital Network Architecture Center (DNA Center) affecting numerous versions. It allows an unauthenticated remote attacker to manipulate HTTP request parameters to redirect users to malicious websites. Exploitation requires user interaction, such as clicking a crafted link, and does not compromise confidentiality but can impact integrity by facilitating phishing or social engineering attacks. The vulnerability has a CVSS score of 4.7 (medium severity) and does not require authentication but does require user interaction. No known exploits are currently reported in the wild. European organizations using Cisco DNA Center for network management should be aware of this risk and apply mitigations promptly. Countries with significant Cisco deployments and critical infrastructure reliance on Cisco DNA Center are most at risk. Mitigations include validating and sanitizing URLs, user awareness training, and applying Cisco patches when available.

Impact

For European organizations, the impact of CVE-2025-20355 primarily involves the risk of social engineering and phishing attacks facilitated by malicious redirection. Since Cisco DNA Center is used extensively for network automation and management, successful exploitation could undermine user trust and potentially lead to credential compromise if users are redirected to phishing sites mimicking legitimate Cisco portals. This could indirectly affect network integrity and operational security. Although the vulnerability does not grant direct access or control over network devices, the redirection could be a stepping stone in multi-stage attacks targeting critical infrastructure, especially in sectors like telecommunications, finance, and government. The medium severity rating reflects that while the vulnerability is not immediately critical, it poses a meaningful risk in environments where Cisco DNA Center is integral to network operations. European organizations with large Cisco deployments should consider this vulnerability a priority for mitigation to prevent exploitation that could disrupt network management workflows or lead to broader security incidents.

References

sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-catc-open-redirect-3W5Bk3Je (opens in a new tab)

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 20 Nov 2025, 17:17 UTC

Technical details

References

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