Patch Management Statistics 2026: MTTR, Backlogs & Remediation Rates

In 2025 the average high or critical software flaw took 54.81 days to patch, while attackers reached mass exploitation of newly disclosed vulnerabilities in a median of just 5 days. That gap, weeks of exposure on flaws criminals are already using, is the core patch management story of 2026.

What’s in This Report

1 The Vulnerability Flood: How Many Patches We Face

Patch management starts with a supply problem. The number of vulnerabilities disclosed every year has reached a level no team can address one at a time, which is why remediation now depends on prioritization rather than brute force.

The takeaway for any business is simple: no in-house team patches 48,000 flaws a year. The job is to find the small fraction that actually threatens your systems and fix those first, which is exactly what a disciplined managed vulnerability and patching program is built to do. Our companion breakdown of exploited CVEs and zero-day timing digs deeper into which of those flaws attackers weaponize.

Source: Edgescan Vulnerability Statistics Report | NIST National Vulnerability Database | Tenable Patch Tuesday 2025 Review

2 Mean Time to Remediate: How Long Patching Really Takes

Mean time to remediate, or MTTR, is the average number of days between discovering a vulnerability and fully fixing it. It is the metric that matters most in patch management because it measures how long an exploitable hole stays open. In 2025 those windows stayed stubbornly wide.

Teams do triage the scariest flaws faster: an internet-facing device with a known exploit gets fixed in about 32 days, roughly three weeks quicker than an average high-risk application bug. But “faster” is relative. A month is still a long time to leave a door open when attackers are already walking through it, a gap we quantify in the exploitation section below.

See how managed IT keeps patching on schedule

Source: Edgescan Vulnerability Statistics Report | Verizon 2025 Data Breach Investigations Report | Qualys 2026 Patch Benchmark

3 Patch Backlogs: The Vulnerabilities Left Behind

Because disclosure outpaces remediation, unfixed findings pile up. The patch backlog, the set of known issues a business has not yet closed, is now a permanent feature of enterprise security rather than a temporary lapse.

Get a free security audit to size your backlog

Source: Edgescan Vulnerability Statistics Report | Verizon 2025 Data Breach Investigations Report

4 Remediation Rates by Severity, Asset and Industry

Headline averages hide big differences. How fast a flaw gets fixed depends on how dangerous it is, where it lives, and what industry runs the system. These cuts of the data explain why two businesses can face the same vulnerability yet carry very different risk.

The pattern holds across the data: severity and internet exposure pull remediation faster, while operational complexity and legacy hardware push it slower. Regulated small and midsize businesses, in healthcare, finance, and manufacturing, often sit on the slow end because their systems cannot simply be rebooted mid-shift. That is where a documented patch strategy, often owned by a virtual CIO, closes the gap without disrupting operations.

Modernize the infrastructure behind slow patch cycles

Source: Edgescan Vulnerability Statistics Report | Verizon 2025 Data Breach Investigations Report

5 The Race Against Exploitation: Why the Clock Matters

Patch metrics only matter because attackers are racing the same clock. In 2026 the data shows they are winning the opening laps: exploitation now begins before, or at the moment, most defenders even start.

Build recovery that survives a missed patch

Source: Verizon 2025 Data Breach Investigations Report | Mandiant M-Trends 2025 | Edgescan Vulnerability Statistics Report

6 What Slow Patching Costs Small Businesses

For a small or midsize business, the patch gap is not an abstract metric. It is the most common way ransomware gets in, and small companies absorb the damage at a far higher rate than large ones.

The reason smaller organizations are hit harder is the same reason their MTTR runs high: fewer hands, slower patch cycles, and thinner incident response. Attackers know it. Closing the exploited-vulnerability path, the entry point in roughly a third of ransomware cases, is the highest-return move a small business can make, and it is almost entirely a patching and configuration discipline.

Get a patch strategy built for your business

Source: Sophos State of Ransomware 2025 | Verizon 2025 Data Breach Investigations Report

7 CISA KEV and Patch Deadlines: The Compliance Benchmark

If 48,000 CVEs a year is too many to chase, the CISA Known Exploited Vulnerabilities catalog is the shortlist that matters. It names the flaws confirmed to be under active attack, and for federal agencies it comes with hard remediation deadlines that private businesses increasingly treat as a benchmark.

Source: CISA Known Exploited Vulnerabilities Catalog | CISA Binding Operational Directive 22-01 | Edgescan Vulnerability Statistics Report

8 Every Patch Management Statistic in One Table

A single reference view of every figure in this report, with its primary source and year. Journalists and analysts are welcome to cite these with attribution.

9 Frequently Asked Questions

10 Methodology and Sources