Zero Wire: A Public Feed for Triaging Critical Internet Vulnerabilities

The bottleneck in vulnerability response is moving. AI-assisted analysis is surfacing flaws in large codebases faster than most security teams can read, sort, and act on what arrives. Cloudflare's new Zero Wire feed is aimed squarely at that gap.

Picture a typical morning. A disclosure lands before breakfast, and within the hour someone is comparing vendor advisories, reading research, checking which systems run the affected software, and answering the business question that always comes next: are we exposed? Often a second disclosure arrives before the first one is finished. AI tools can work through large codebases and find deeply nested flaws that may have sat unnoticed for years. That means more disclosures, and more pressure on teams to judge the impact of each one quickly.

What Zero Wire is

Zero Wire is a public vulnerability intelligence feed that lives inside the security section of Cloudflare Radar. The model is closer to a wire service than a database. Each entry is a short briefing on a significant development, written to help a reader decide what to do next.

Every briefing bundles four things: a plain-language explanation of the vulnerability, the teams who should investigate it, recommended actions, and links to the underlying evidence and vendor guidance. The design targets two readers at once. A CISO should grasp the issue quickly and know which questions to ask. An engineer should be able to follow the same briefing down to the technical remediation material.

Cloudflare adds its own material: security research, observations from its network, and working knowledge of the controls that reduce exposure. It also publishes a pre-compiled prompt for use with an AI agent when a team wants to assess impact across its infrastructure. None of this depends on being a Cloudflare customer.

Scope: not a CVE catalog

Zero Wire doesn't try to index every CVE. It sits alongside vendor advisories and vulnerability databases and points readers toward them. The focus is critical CVEs in Internet-facing software: web applications, the runtimes and libraries they depend on, and exposed services where a proxy can help blunt exploitation.

Selection is editorial. Each briefing explains potential impact, which deployments deserve a look, what's known about exploitation, and what mitigation and patching guidance exists. The feed treats severity and evidence of active exploitation as separate signals. A critical score doesn't tell you attackers are using the flaw, and a lack of severity hype doesn't mean it's safe to ignore. Readers need both.

A Cloudflare protection isn't required for inclusion. Some issues need vendor patches or changes outside the traffic Cloudflare can inspect. Where Cloudflare controls can help, the briefing explains their scope and what configuration they require.

Navigating the feed

The homepage sorts briefings into two groups. "Needs attention" holds issues that require active assessment, including those with known exploitation or guidance still changing. "Reference" holds briefings whose guidance has settled. Moving something to Reference doesn't mean every affected system is patched. An older vulnerability can still matter to an organization that hasn't finished remediation, and that's worth remembering when a team scans the list.

Each card carries a status and a last-checked date. Known exploitation, an open investigation, and an available vendor fix are three different facts. Read them against the evidence in the briefing rather than treating the label as a verdict on your environment. You can search by CVE or issue name and follow technology tags to related entries, and a single briefing may cover several related CVEs when they make more sense together.

A worked example: php2shell

The php2shell vulnerability is a useful test case because it exposes a mistake teams make often. The flaw sits in the PHP runtime. Applications built on top of it, such as WordPress or Magento, can be fixed in one place and still be vulnerable through the other. Updating application code or a plugin alone doesn't repair the runtime underneath.

The briefing names which system owners need to act and links to the PHP security guidance for affected versions and remediation steps. That routing matters. In many organizations the person who maintains the site and the person who owns the server image aren't the same, and a briefing that gets the right ticket to the right team saves a day of back-and-forth.

From briefing to action plan

The "What to do now" section gives a short list of next steps. Depending on the issue, that might mean identifying affected deployments, asking a hosting provider about versions, applying vendor updates, reviewing suspicious activity, or keeping compensating controls in place until patching finishes.

The goal is a sharper conversation. For a PHP deployment, the questions are concrete: which runtime is actually running, has the vendor fix been applied, and who owns the update. Detailed applicability and remediation steps stay in the linked vendor advisory, since those can change as an investigation develops.

For teams that want help with inventory work, the AI agent prompt asks for a read-only assessment covering deployed software, relevant vendor fixes, exposure, and compensating controls. The output is structured as per-asset evidence, open unknowns, and next actions. Copying the prompt doesn't scan anything or change any system. It just gives an agent a disciplined set of questions to answer against your own environment.

Evidence, and what it does and doesn't prove

Each briefing links to external material: CVE records, research, and exploitation evidence, including the CISA Known Exploited Vulnerabilities Catalog. These sources answer different questions. A vendor advisory establishes affected versions and fixes. An exploitation report shows that attackers are active. Treating either as proof of the other leads to bad decisions.

Where relevant, Cloudflare adds traffic context, such as requests matching WAF rules that suggest exploitation attempts. Here's the thing: seeing an attack attempt doesn't establish that a given organization was compromised. And the absence of observed attempts on Cloudflare's network doesn't establish that exploitation is absent everywhere else. Briefings are written to separate what the sources establish from what remains unknown.

Charts follow the same logic. The php2shell briefing plots HTTP requests matching Cloudflare WAF managed rules over time. Those requests aren't a count of compromised systems or successful exploits. The chart is meant to show how much attention threat actors are paying a given vulnerability, which is a useful proxy for urgency but not for impact.

A chronology section records significant changes, such as new advisories or revised guidance. Combined with the last-checked date, it lets a returning reader see what moved since their last visit.

Cloudflare's role, and the limits of a WAF rule

The Cloudflare section explains whether a compensating control exists and how to deploy it. If a CVE can be addressed with a WAF rule, the briefing reports availability and the configuration it needs. Where applicable, it links to the relevant dashboard for paid and free plans, with a clear next step: review your WAF configuration to determine whether you are protected. That link takes you to the setting. It doesn't enable a rule or confirm that a deployment is working.

A WAF mitigation covers the traffic it can see. It isn't a substitute for fixing vulnerable software. Blocking requests can keep exposed data from reaching an attacker, but it can't undo actions already performed at the origin. Teams should treat the mitigation as a bridge while they follow vendor remediation guidance.

What to take from it

The useful test for a vulnerability briefing is simple: after reading it, do you understand the issue well enough to name a next step? Zero Wire is built around that test, with the same core answers in every entry: what happened, who should investigate, what to do now, and where the evidence sits.

The real measure will be whether feeds like this keep pace with disclosure volume as AI-assisted discovery accelerates. If they do, teams will spend less of each disclosure cycle assembling basic facts and more of it deciding what to change.