hiroi akusesukengen de zyouhourouei ga hasseisi kanenai.

Here 広い means broad in the sense of wide in scope.

So 広いアクセス権限 means:

• broad access permissions
• wide-ranging access rights
• overly permissive access

This is a common extension of 広い beyond physical width. In English we also say things like broad authority or broad access, so the idea is similar.

In this sentence, で indicates the cause, condition, or means under which something happens.

So:

• 広いアクセス権限で = because of broad access permissions
• or with broad access permissions in place

It is not the location use of で here.
It is closer to due to, as a result of, or under.

So the sentence is saying that broad access rights create the conditions for an information leak to occur.

Because 情報漏洩 is the thing that occurs.

The verb 発生する means to occur, to happen, or to arise.
With this kind of verb, the event or phenomenon that happens is usually marked by が.

So:

• 情報漏洩が発生する = an information leak occurs

Here 情報漏洩 is the grammatical subject of 発生する.

That is because かねない attaches to the masu-stem of a verb.

So:

• dictionary form: 発生する
• masu form: 発生します
• stem: 発生し
• • かねない
• = 発生しかねない

This pattern is:

• verb stem + かねない

Examples:

• 起こりかねない = it might happen
• 忘れかねない = might forget
• 誤解されかねない = might be misunderstood

かねない means might happen, could happen, or is liable to happen, but usually with a negative, undesirable, or worrying nuance.

So 発生しかねない does not just mean neutral possibility.
It suggests something like:

• there is a real risk that it may occur
• it could easily happen
• it may well happen, unfortunately

That nuance is important.

Both can be translated as might, but the nuance is different.

かもしれない

• neutral possibility
• simply says something may be true or may happen

Example:

• 雨が降るかもしれない。
• It might rain.

かねない

• often used for bad or undesirable outcomes
• implies concern, risk, or danger

Example:

• 情報漏洩が発生しかねない。
• An information leak could occur / There is a risk of an information leak occurring.

So in this sentence, かねない is more natural than かもしれない because information leakage is a negative outcome.

Japanese often leaves out the subject when it is not necessary.

This sentence focuses on the risk itself, not on who causes it.

So instead of saying:

• A company may cause an information leak because its access rights are too broad

Japanese naturally says something more like:

• With broad access permissions, information leakage may occur

This style is especially common in:

• technical writing
• business writing
• warnings
• security discussions

It sounds more objective and formal.

Japanese nouns usually do not show singular/plural clearly unless the context makes it necessary.

So アクセス権限 could be understood as:

• access permission
• access permissions
• access rights
• access privileges

In English, the most natural translation here is usually plural:

• broad access permissions
• overly broad access privileges

That is because in IT/security contexts, English often talks about permissions or privileges in the plural.

Yes, it is understandable and natural enough, especially in technical or business contexts.

That said, depending on context, Japanese may also use expressions like:

• アクセス権限が広い
• 過剰なアクセス権限
• 広範なアクセス権限

Nuance differences:

• 広いアクセス権限 = broad access permissions
• アクセス権限が広い = the access permissions are broad
• 過剰なアクセス権限 = excessive access permissions
• 広範なアクセス権限 = extensive/wide-ranging access permissions, slightly more formal

So the original wording is fine, but there are other natural ways to say something similar.

Both can mean to happen or to occur, but 発生する is more formal and technical.

発生する

• formal
• common in business, technical, legal, and security contexts
• used for incidents, problems, failures, leaks, errors, etc.

起こる

• more general and conversational
• can also be used, but may sound less technical

So in a sentence about information leakage and access permissions, 発生する fits the tone very well.

Not exactly in the active sense of someone intentionally using them.

It is better understood as:

• with broad access permissions
• under broad access permissions
• because of broad access permissions

So で here is not emphasizing a deliberate action like by using.
It is describing the condition or cause that makes the leak possible.

Yes. Even though 広い literally just means broad, the full sentence gives it a negative implication.

Because it says:

• 情報漏洩が発生しかねない = there is a risk of information leakage

the listener naturally understands that the access rights are broader than they should be.

So the sentence carries the idea of:

• overly broad access permissions
• excessive access privileges
• permissions that are too wide in scope

even if too is not explicitly stated.

Yes, it sounds fairly formal and is especially suitable for:

• IT/security documentation
• internal reports
• compliance discussions
• risk assessments
• business writing

Reasons it sounds formal:

• アクセス権限 is technical vocabulary
• 情報漏洩 is formal/business-like
• 発生する is formal
• かねない often appears in written warnings or cautionary statements

So this is not especially casual everyday speech; it fits a professional context well.