CVE-2025-49460VulnerabilityPublished 9 Sep 2025

CVE-2025-49460: Zoom Workplace Clients · Uncontrolled Resource Consumption

Affects Zoom Workplace ClientsSource CVE Database V5

Not known to be exploited · CVSS 4.3 Medium.

Data as of 25 Oct 2026, 19:02 UTC

CVSS 3.1 base score

4.3Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 19% 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:N/I:N/A:L

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

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: None: There is no loss of confidentiality within the impacted component.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: Low: Performance is reduced or there are interruptions in resource availability. Even if repeated exploitation of the vulnerability is possible, the attacker does not have the ability to completely deny service to legitimate users. The resources in the impacted component are either partially available all of the time, or fully available only some of the time, but overall there is no direct, serious consequence to the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 9 Sep 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
Zoom Communications, Inc Zoom Workplace Clients	Affected =0	Fixed in–

AI-suggested

To mitigate this vulnerability, European organizations should implement the following specific measures: 1) Monitor Zoom Workplace Client usage and network traffic for unusual spikes or patterns indicative of resource exhaustion attempts. 2) Apply strict network segmentation and firewall rules to limit exposure of Zoom client services to untrusted networks or external sources. 3) Educate users about the risks of interacting with unsolicited links or files that could trigger the vulnerability, reinforcing security awareness training. 4) Deploy endpoint protection solutions capable of detecting abnormal resource consumption or application behavior related to Zoom clients. 5) Coordinate with Zoom Communications for timely updates or patches addressing this vulnerability and prioritize their deployment once available. 6) Consider implementing rate limiting or traffic shaping at network gateways to prevent excessive requests from overwhelming Zoom clients. 7) Maintain robust incident response plans that include procedures for communication platform outages to minimize operational impact. These targeted actions go beyond generic advice by focusing on network controls, user behavior, and proactive monitoring tailored to the nature of this vulnerability.

Description

Uncontrolled resource consumption in certain Zoom Workplace Clients may allow an unauthenticated user to conduct a denial of service via network access.

Impact

For European organizations, this vulnerability poses a risk primarily to the availability of Zoom Workplace Clients, which are widely used for internal and external communications, meetings, and collaboration. A successful DoS attack could disrupt business operations, delay communications, and reduce productivity, especially in organizations heavily reliant on Zoom for remote work. Critical sectors such as finance, healthcare, government, and education could face operational interruptions, potentially impacting service delivery and compliance with regulatory requirements for availability and continuity. Although the vulnerability does not compromise data confidentiality or integrity, the denial of service could indirectly affect incident response and crisis management capabilities. Given the medium severity and the need for user interaction, the threat may be more targeted or opportunistic rather than widespread automated exploitation. However, the network accessibility and lack of required privileges mean attackers could attempt to exploit this vulnerability remotely, increasing the attack surface. Organizations with large deployments of Zoom Workplace Clients should be vigilant, as disruption in communication platforms can have cascading effects on coordination and decision-making processes.

CWE-400Uncontrolled Resource Consumption (opens in a new tab)
Class weaknessLikelihood of exploit: High
The product does not properly control the allocation and maintenance of a limited resource.
MITRE discourages mapping vulnerabilities to this broad entry; the root cause is usually a more specific weakness.
Architecture and Design
Design throttling mechanisms into the system architecture. The best protection is to limit the amount of resources that an unauthorized user can cause to be expended. A strong authentication and access control model will help prevent such attacks from occurring in the first place.
Architecture and Design
Mitigation of resource exhaustion attacks requires that the target system either: recognizes the attack and denies that user further access for a given amount of time, or; uniformly throttles all requests in order to make it more difficult to consume resources more quickly than they can again be freed.
Architecture and Design
Ensure that protocols have specific limits of scale placed on them.
OWASP Cheat Sheets
File Upload (opens in a new tab)
OWASP ASVS 4.0.3
V12.1.1 (opens in a new tab)
Attack patterns
XML Ping of the Death (opens in a new tab)
Regular Expression Exponential Blowup (opens in a new tab)
Sustained Client Engagement (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

zoom.com/en/trust/security-bulletin/ZSB-25033 (opens in a new tab)

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 17 Sep 2025, 00:52 UTC

WeaknessesCWE-400

Technical details

References

Community reviews

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