VulnerabilityPublished 29 Sep 2020Updated 30 May 2025

CVE-2020-15595: Zoho Application Control Plus

Source CVE Database V5

Not known to be exploited · CVSS 4.3 Medium · fixed in 10.0.511 : update affected systems when convenient.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score

4.3Medium

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

EPSS: 2.2% chance of exploitation in 30 days – higher than 82% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 10.0.511

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

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

Bold values are the worst case: easiest to exploit or largest impact.

Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
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).
Availability: None: There is no impact to availability within the impacted component.
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: None: There is no loss of integrity within the impacted 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.
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.
User Interaction: None: The vulnerable system can be exploited without any interaction from any user.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 29 Sep 2020
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
n/a n/a	Affected <10.0.511	Fixed in 10.0.511

AI-suggested

Upgrade Zoho Application Control Plus to version 10.0.511 or later, where this vulnerability is fixed.
Restrict access to the Element Configuration feature strictly to trusted administrators and implement strong authentication mechanisms, including multi-factor authentication (MFA), to reduce the risk of unauthorized access.
Monitor and audit access logs for unusual or unauthorized attempts to access configuration data, focusing on the retrieval of IP range and subnet information.
Implement network segmentation and zero-trust principles to limit the impact of any potential reconnaissance by attackers.
Conduct regular internal penetration testing and vulnerability assessments to identify and remediate similar information disclosure issues.
Educate privileged users on the importance of credential security to prevent attackers from gaining the limited privileges required to exploit this vulnerability.
If upgrading immediately is not feasible, consider applying compensating controls such as network-level access restrictions (e.g., IP whitelisting) to the management interfaces of Zoho Application Control Plus.

Description

An issue was discovered in Zoho Application Control Plus before version 10.0.511. The Element Configuration feature (to configure elements included in the scope of elements managed by the product) allows an attacker to retrieve the entire list of the IP ranges and subnets configured in the product and consequently obtain information about the cartography of the internal networks to which the product has access.

Impact

For European organizations, the exposure of internal network topology information can increase the risk of targeted cyberattacks, especially in sectors where network segmentation is critical for security, such as finance, healthcare, and critical infrastructure. Attackers gaining knowledge of IP ranges and subnet structures can identify high-value targets, pivot points, or poorly segmented network zones, facilitating subsequent exploitation or data exfiltration attempts. Although the vulnerability itself does not directly allow system compromise or denial of service, it lowers the barrier for attackers conducting internal reconnaissance. This is particularly concerning for organizations that rely on Zoho Application Control Plus for managing their IT assets and network elements. The risk is amplified in environments where privileged access controls are weak or where attackers can obtain limited credentials through phishing or insider threats. Additionally, given the increasing regulatory focus in Europe on data protection and network security (e.g., GDPR, NIS Directive), any leakage of internal network information could have compliance implications if it leads to further breaches.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 8 Jul 2025, 15:11 UTC

Technical details

References

Community reviews

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