US FEC Cyberattack Explained: Filing System Restored After 41-Hour Outage Days Before Midterms

Illustrative image: The U.S. Capitol in Washington, D.C. — Image: Wikimedia Commons

TL;DR: The US Federal Election Commission (FEC) has restored its electronic filing system after taking it offline for nearly 41 hours to contain a cyberattack, Reuters reported on 28 October. The outage, days before the 3 November midterm elections, temporarily hid big-donor political spending from public view — but the FEC says voting itself is unaffected.

📌 KEY HIGHLIGHTS

The FEC's e-filing system went offline late on Monday 26 October after a "bad actor" tried to breach its systems, and was restored on Wednesday night after nearly 41 hours.
Super PACs and dark-money groups could not file mandatory 24- and 48-hour spending reports during the outage, concealing late-campaign spending from the public.
Super PACs and dark-money groups were spending over $50 million a day in the week before the outage, OpenSecrets said; over $250 million was reported on 20 October alone.
The FEC says most affected services are restored; campaign finance managers had to reset passwords before logging back in.
No motive has been established, and the FEC has not detailed the cause; the FBI and CISA referred questions to the FEC.

What happened?

The US Federal Election Commission restored its electronic filing system on Wednesday night after taking it offline for nearly 41 hours to contain a cyberattack, Reuters reported on 28 October 2026. The outage temporarily concealed spending by big donors as political donations ramp up in the final days before the midterm elections.

The disruption began just after 10 p.m. ET on Monday 26 October, when the FEC posted a notice saying it was investigating a problem that caused "major" outages across the systems that process electronic campaign filings. An FEC officer told campaign compliance firms late on Monday that the agency had taken its web-facing services offline after a "bad actor" tried to breach its systems, according to an email reviewed by Reuters.

By Tuesday evening the FEC said the issue had been identified and a fix was being implemented, but the system stayed offline into its third evening. The FEC has since told users that most of the services affected by the outage have been restored.

Why the timing matters

The outage landed at the most sensitive moment of the American political calendar. Campaign watchdogs sounded alarms as it dragged on, because super PACs and other groups could not file the mandatory 24- and 48-hour reports that show how much money they are spending to help or hurt candidates at the polls.

"We didn't have access to the last-minute spending, which is really ramped up as the election draws nearer," said campaign finance watchdog Molly White, who tracks crypto and Big Tech political spending. "We have no visibility into that when the filing systems are down." She added: "It's pretty devastating this close to the election."

The outage came as daily spending accelerates to its fastest pace in the two-year election cycle, campaign finance experts said. Super PACs, which can accept and give unlimited amounts of money, and dark-money groups spent an average of over $50 million per day the week before the outage, OpenSecrets research director Brendan Glavin said. More than $250 million in spending was reported on October 20 alone.

"Disclosure delayed is disclosure denied," Hilary Braseth, executive director of nonpartisan campaign finance watchdog OpenSecrets, said in a statement released before the system was restored. "When hundreds of millions of dollars in outside money flood political airwaves in the final days before an election, transparency is not an optional luxury, it is a fundamental public safeguard."

Illustrative image: The U.S. Capitol, seat of the US Congress — Image: Wikimedia Commons

What is still unknown

Reuters could not establish the motive for the hacking effort. The FEC did not return requests for comment on Wednesday and did not announce any details on the cause of the outage. The Cybersecurity and Infrastructure Security Agency (CISA) and the FBI both referred questions to the FEC.

The timing of the hacking attempt so close to the 3 November elections, and the lack of information from the FEC, stirred up conspiracy theories throughout the industry, several people told Reuters. White noted it would be a good way for unscrupulous actors to hide unpopular last-minute spending — while stressing there is no real information to say that is what happened.

Kyle Sandy, cybersecurity director at IT security firm Logically, said taking the system offline was the right call: "It tells me the FEC detected something they couldn't immediately scope and chose a known outage over an unknown risk," giving the agency time to ensure none of its data was altered before bringing it back online.

What the FEC does — and what this does not affect

The FEC is the independent US agency that enforces campaign finance law and publishes the reports showing what candidates, parties and political committees raise and spend. It does not run elections, does not manage voter rolls, and has no role in counting ballots — so the outage should have no effect on voters' ability to cast ballots on 3 November.

What it does affect is transparency: previously filed reports stayed searchable during the outage, but no new 24- and 48-hour spending disclosures could be submitted while the filing system was down.

Should you care?

✅ Yes — if you follow US elections or cybersecurity. A federal election watchdog taken offline by a cyberattack days before a national vote is rare, and the 41-hour blackout hid the fastest-spending stretch of the campaign. The open questions now are what the attackers accessed, whether any filed data was altered, and whether the FEC will disclose the cause.

Timeline: US FEC cyberattack and outage

Date (ET)	What happened
Mon 26 Oct, ~10 p.m.	FEC posts notice of "major" outages in e-filing systems; web-facing services taken offline after a "bad actor" tries to breach them
Tue 27 Oct, ~8 p.m.	FEC says the issue is identified and a fix is being implemented; system still offline
Wed 28 Oct, night	E-filing system restored after nearly 41 hours; FEC says most affected services are back
3 Nov 2026	US midterm elections — all 435 House seats and about a third of Senate seats contested

FAQs

Was the US FEC hacked? Reuters reported on 28 October that the FEC took its e-filing system offline for nearly 41 hours to contain a cyberattack. The agency had earlier described only a "bad actor" attempting to breach its systems; the motive and the exact cause have not been disclosed.

Is the FEC filing system back online? Yes — the FEC restored its electronic filing system on Wednesday night and told users most affected services are restored. Campaign finance managers had to reset their passwords before logging in.

Does the FEC outage affect voting in the midterms? No. The FEC does not administer elections, manage voter rolls or count ballots, so voters' ability to cast ballots on 3 November is unaffected. The impact was on public disclosure of campaign spending, not on voting.

How much political spending was hidden during the outage? The exact figure is not yet public, but the scale is large: super PACs and dark-money groups were spending over $50 million a day in the week before the outage, and more than $250 million was reported on 20 October alone, according to OpenSecrets.

Takeaway: A 41-hour cyberattack outage at the US election watchdog, days before the midterms, is now over — but the questions it leaves behind, about motive, access and data integrity, are not. Watch for the FEC's next disclosure.

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