VulnerabilityPublished 6 Jul 2025

CVE-2025-7095: Comodo Internet Security Premium · Improper Certificate Validation

Affects Comodo Internet Security PremiumSource CVE Database V5

Not known to be exploited · CVSS 6.3 Medium.

Data as of 26 Oct 2026, 11:07 UTC

CVSS 4.0 base score

6.3Medium

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

EPSS: 0.2% chance of exploitation in 30 days – higher than 21% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X

Attack Vector: Network
Attack Complexity: High
Attack Requirements: None
Privileges Required: None
User Interaction: None
Vulnerable system confidentiality: None
Vulnerable system integrity: Low
Vulnerable system availability: None
Subsequent system confidentiality: None
Subsequent system integrity: None
Subsequent system availability: None

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

Attack Vector: Network: The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, 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: High: The successful attack depends on the evasion or circumvention of security-enhancing techniques in place that would otherwise hinder the attack. These include: Evasion of exploit mitigation techniques, for example, circumvention of address space randomization (ASLR) or data execution prevention (DEP) must be performed for the attack to be successful; Obtaining target-specific secrets. The attacker must gather some target-specific secret before the attack can be successful. A secret is any piece of information that cannot be obtained through any amount of reconnaissance. To obtain the secret the attacker must perform additional attacks or break otherwise secure measures (e.g. knowledge of a secret key may be needed to break a crypto channel). This operation must be performed for each attacked target.
Attack Requirements: None: The successful attack does not depend on the deployment and execution conditions of the vulnerable system. The attacker can expect to be able to reach the vulnerability and execute the exploit under all or most instances of the vulnerability.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
User Interaction: None: The vulnerable system can be exploited without interaction from any human user, other than the attacker.
Vulnerable system confidentiality: None: There is no loss of confidentiality within the Vulnerable System.
Vulnerable system 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 to the Vulnerable System.
Vulnerable system availability: None: There is no impact to availability within the Vulnerable System.
Subsequent system confidentiality: None: There is no loss of confidentiality within the Subsequent System or all confidentiality impact is constrained to the Vulnerable System.
Subsequent system integrity: None: There is no loss of integrity within the Subsequent System or all integrity impact is constrained to the Vulnerable System.
Subsequent system availability: None: There is no impact to availability within the Subsequent System or all availability impact is constrained to the Vulnerable System.

Definitions: FIRST CVSS v4.0 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 6 Jul 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
Comodo Internet Security Premium	Affected =12.3.4.8162	Fixed in–

AI-suggested

European organizations using Comodo Internet Security Premium 12.3.4.8162 should take the following specific actions: 1) Temporarily disable automatic updates or update mechanisms within Comodo until a vendor patch is available to prevent exploitation via the update channel. 2) Implement network-level controls to restrict outbound connections from endpoints to only trusted update servers, using firewall rules or proxy filtering to reduce exposure to malicious update servers. 3) Monitor network traffic for anomalous connections or unexpected update-related activity that could indicate exploitation attempts. 4) Employ endpoint detection and response (EDR) solutions to detect suspicious behavior potentially resulting from compromised update processes. 5) Consider deploying alternative or additional endpoint protection solutions that do not share this vulnerability to reduce reliance on the affected product. 6) Maintain rigorous patch management and vendor communication channels to quickly apply updates once Comodo releases a fix. 7) Conduct user awareness training to recognize signs of endpoint compromise despite the lack of required user interaction for exploitation.

Description

A vulnerability classified as critical has been found in Comodo Internet Security Premium 12.3.4.8162. This affects an unknown part of the component Update Handler. The manipulation leads to improper certificate validation. It is possible to initiate the attack remotely. The complexity of an attack is rather high. The exploitability is told to be difficult. The vendor was contacted early about this disclosure but did not respond in any way.

Impact

For European organizations, this vulnerability poses a risk to endpoint security where Comodo Internet Security Premium is deployed. Improper certificate validation in the update process could allow attackers to inject malicious updates, leading to compromised systems that may be used for further lateral movement, data manipulation, or persistence within corporate networks. Although the attack complexity is high and no known exploits exist yet, the potential impact on the integrity of security software is significant. Organizations relying on Comodo for endpoint protection may face increased risk of undetected malware infections or unauthorized control of security components. This could affect sensitive sectors such as finance, healthcare, and critical infrastructure where endpoint security is crucial. The lack of vendor response and absence of patches increases the window of exposure, emphasizing the need for proactive risk management. However, the medium severity and difficulty of exploitation somewhat limit the immediate threat level.

Summary

CVE-2025-7095 is a vulnerability identified in Comodo Internet Security Premium version 12.3.4.8162, specifically within the Update Handler component. The flaw arises from improper certificate validation, which means that the software fails to correctly verify the authenticity and integrity of certificates used during update processes. This improper validation can potentially allow an attacker to spoof or manipulate update communications, leading to the installation of malicious updates or unauthorized code execution. The vulnerability is remotely exploitable without requiring user interaction or authentication, but the attack complexity is considered high, indicating that exploitation demands significant skill or conditions. The CVSS 4.0 base score is 6.3, categorized as medium severity, reflecting a moderate impact primarily on the integrity of the system with no direct impact on confidentiality or availability. The vendor has not responded to the disclosure, and no patches or known exploits in the wild have been reported as of the publication date. The vulnerability's exploitation could undermine the trust model of the update mechanism, potentially allowing attackers to compromise endpoint security by delivering malicious payloads disguised as legitimate updates.

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 6 Jul 2025, 21:54 UTC

Technical details

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