We inherited a legacy codebase that isn't secure and compliant

You are accountable for vulnerabilities in code your team never wrote, and clearing them costs engineering time you had committed elsewhere. HeroDevs secures the end-of-life dependencies on the versions they arrived on, without a rewrite nobody scoped.

Dashboard showing acme-corp with no alerts and orbit-labs acquired Mar 2026 with several open alerts.

The due diligence report did not come with a remediation plan

The deal closed and the codebase is yours. Nobody on your team wrote it, the engineers who did may not have come with the deal. The due diligence report flagged end-of-life dependencies but came with no remediation plan. Those dependencies no longer receive security patches from maintainers, so nothing upstream will fix them.

Those vulnerabilities are now on your risk register, under your name, and clearing them competes with deadlines the business already committed to. None of that work existed when the quarter was planned and committed to.

What breaks when upstream patches stop

Security

CVE open, no fix

Compliance

No evidence to show

Roadmap & budget

Migration inserted, speed unplanned

Timeline showing OSS with security patches fixed moving to end-of-life with unpatched CVE vulnerabilities.

Find out what you actually inherited

Get a report of every end-of-life dependency across your repositories, direct and transitive.

Software scan summary showing 1701 packages scanned, 218 end-of-life, 1322 not EOL, 157 unknown with risk metrics.

The Problem

Every option puts the acquired codebase back on your engineers

Rewrite it onto your stack

The standard integration answer, and the most expensive one. You are rebuilding a product you already paid for, on a timeline that delays every synergy the deal was justified on, using engineers who were meant to be building something else.

Defer it until after integration

Reasonable on paper, except the vulnerabilities do not wait for your integration plan, and they are already on your register. Whatever the acquired team was doing about them, they are now your findings to answer for.

Have AI do it

Fast, and increasingly expected, because a model will read code nobody on staff understands and return a fix in minutes. But independent research finds nearly half of AI-generated code introduces new vulnerabilities, and an unreviewed patch leaves an open question about who answers for it. On code your team did not write, nobody can close that question.

The Solution

You do not need to understand the codebase to secure it

Find out what you inherited

Scan the acquired repositories and get an inventory of every end-of-life dependency, direct and transitive, with no involvement from the original team.

Secure the acquired codebase on the versions that came with the deal

Drop-in replacements, engineer-built, so the application keeps running as acquired rather than being rebuilt under a forced migration.

Support does not expire.

New CVEs are patched under an SLA, for as long as you keep using the software.

Why HeroDevs?

19M+

package versions tracked

1,000+

vulnerabilities remediated

900+

enterprise customers secured by HeroDevs

Statista logo

We maintained our security posture without compromising our strategic roadmap, all while achieving substantial cost savings compared to a full migration.

Markus Wolf, Architect @ Statista

An inventory of every end-of-life dependency you inherited, and the secured version that replaces it

Exposure report showing 1,247 dependencies at end-of-life with 8,412 scanned across six repositories.Pull request changing framework-core version from 4.2.0 to 4.2.0-nes.7 in package.json dependencies.

What engineering and security teams ask

Get answers to some of our most commonly asked questions.
Of course, if you can't find the answer you're looking for, feel free to contact us.

We don't know what's in the codebase yet. Where do we start? 
Does this work on a codebase nobody on our team wrote? 
What if the engineers who built it didn't come with the deal? 
We acquire regularly. Does this scale across deals? 
We plan to sunset this application eventually. Is it still worth covering? 
What about compliance obligations that came with the acquisition? 

Something not covered here? Talk to an expert.