I’ve spent ten years writing about breaches, advisories, and the post-incident reports that come out months later. Most predictions posts fail because they describe what already happened. These ten are extensions of patterns already visible in 2026, and I’ve picked the ones I expect security teams to feel next year.
1. AI agents will become the insider threat nobody hired
Companies are giving AI agents access to email, ticketing systems, code repositories, and cloud consoles. Each agent holds credentials, and many hold more access than any single employee would.
In 2027, attackers will stop going after the model and start going after what it can reach. Prompt injection hidden in a web page, a PDF, or a calendar invite will push agents to leak data or run actions they were never meant to run.
Expect the first widely reported breach where the root cause is an over-permissioned agent, not a stolen password.
2. Identity will be attacked more than software
Attackers have figured out that logging in is easier than breaking in. Stolen session tokens, SIM swaps, and help desk calls that talk an agent into resetting MFA already beat many technical defenses.
Next year, more breach reports will read the same way: valid account, valid login, no malware. Passkeys will gain ground, but attackers will aim at the recovery flows around them, because a strong lock does not matter if the reset process is weak.
3. Deepfake fraud will become a routine business expense
Voice cloning needs a few seconds of audio. Video cloning is getting cheaper every quarter. Finance teams and executive assistants will see more fake urgent calls that sound exactly like the CFO.
By 2027, I expect “call back on a known number” and “second approver for wire changes” to be written into standard payment policy at mid-size companies, not just banks. Controls that rely on someone recognizing a voice will fail.
4. Shorter certificate lifespans will break unprepared teams
Public TLS certificate validity is being cut in stages under CA/Browser Forum rules. The limit drops to 200 days in March 2026 and to 100 days in March 2027, with 47 days planned after that.
Teams that track certificates in a spreadsheet will miss renewals, and outages will follow. Expect a visible rise in “the site went down because a certificate expired” incidents next year. Automation through ACME and a proper certificate inventory will stop being optional.
5. Software supply chain attacks will target signing keys and build pipelines
Malicious code signed with a legitimate certificate gets past a lot of security tooling. That makes signing keys, CI/CD runners, and package registries more valuable to attackers than the finished product.
Hardware-backed key storage for code signing is now required, so attackers are moving to the systems around the key: build servers, cloud signing services, and developer accounts with publish rights. Teams should treat the pipeline as production infrastructure, with its own access logs and review rules.
6. Post-quantum migration will move from slide decks to project plans
Nobody expects a quantum computer to break RSA next year. The concern is data stolen now and decrypted later. Standards bodies have already published the first post-quantum algorithms, and government timelines are pushing vendors to follow.
In 2027, the practical work starts with a cryptographic inventory: finding every place your company uses RSA, ECC, and older hashing. Many teams will discover they cannot answer that question today.
7. Ransomware groups will steal first and encrypt second, or skip encryption
Backups have improved, so encryption alone pays less. Groups are shifting toward data theft and extortion, with the threat of leaking customer records, contracts, or health data.
Virtualization platforms, backup servers, and file transfer tools will stay prime targets because one compromise reaches a lot of data. Smaller companies in healthcare, law, and construction, which hold sensitive data but run lean IT teams, will take a growing share of attacks.
8. Edge devices will remain the front door
VPN gateways, firewalls, and remote access appliances sit on the internet, run privileged, and often cannot host a security agent. That combination keeps them at the top of attacker target lists.
Each year brings a new batch of zero-days in these products, and patch windows are short. In 2027, more organizations will replace aging edge hardware and shift to zero trust access, mostly after an incident forces the budget.
9. Regulation will start to bite
Several rules reach real deadlines around 2027. The EU Cyber Resilience Act puts security obligations on makers of products with digital elements, with most requirements applying from December 2027. NIS2 enforcement continues to widen across EU member states, and breach disclosure rules elsewhere are tightening.
Product companies will need vulnerability handling processes, SBOMs, and support commitments they can show to an auditor. Security leaders will also face more questions about personal accountability when disclosures are late or incomplete.
10. SaaS integrations and OAuth tokens will be the next large third-party risk
Most companies now run dozens of connected apps, each holding long-lived tokens into the others. When one vendor is breached, those tokens give attackers quiet access to customer environments, with no password involved.
Next year’s breaches will increasingly begin at a small vendor connected to a large customer. Teams will need to audit connected apps, shorten token lifetimes, and cut access they no longer use.
What to do with this list
Pick two predictions that match your exposure and start there. For most teams, that means an identity review, a certificate and key inventory, and a clear answer to what your AI agents can access.
