Google Chrome Zero-Days Under Active Attack – What SOCs Need to Do Now

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Chrome just became the attack surface of the week.

We’re breaking down the latest zero-day exploits, what attackers are doing with them, and how SOC teams can respond before it turns into something bigger. 

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Episode Transcript

SPEAKER_00 (00:03):
Good morning, good afternoon, or good evening,
whenever you may be, and welcometo another episode of the SOC
Brief.
This is your go-to podcast forstaying ahead of the
ever-evolving world ofcybersecurity threats.
I'm your host Andrew, and todaywe're going to discuss a fresh
double zero day situation that'shitting one of the most widely

(00:24):
used pieces of software on theplanet.
That would be Google Chrome.
So these two actively exploitedvulnerabilities are forcing an
emergency security update forover 3.5 billion users.
In this episode, we'll discusswhat these flaws are, how
attackers are abusing them, whythis is something every SOC

(00:45):
needs to be aware of, and thesteps you should take right now
to protect your environment.
So Google confirmed on March15th of this year, so uh maybe a
couple weeks ago, that twozero-day vulnerabilities listed
as CVE 2026-3909 and CVE2026-3910 are being exploited in

(01:06):
the wild.
They did release an emergencyupdate outside of their normal
release cycle, and CISA hasurged all organizations to
update as soon as possible.
These are high severity flawsthat could allow attackers to
execute arbitrary code or gainunauthorized access when users
visit malicious web pages.

(01:29):
And somewhat obviously, Chromeis a popular target because it's
installed on virtually everycorporate endpoint.
A successful exploit can giveattackers a foothold on user
machines, steal credentials,drop malware, or move laterally
across a network.
We're seeing targeted campaignsalready hitting government,

(01:49):
finance, and enterpriseorganizations.
And Google had to push anout-of-band patch because
attackers were immediately usingthese exploits in attacks.
This is trending to be the newnormal, so zero days are being
weaponized within hours or daysof discovery, and SOCS are
really left-playing catch-up ifpatching isn't treated as a

(02:10):
critical process within theorganization.
For SOCs themselves, detectionsare going to start with
monitoring for unusual Chromeprocesses that are spawning
child applications.
You can also look for unexpectednetwork connections from the
browser or signs of memorycorruption.
And all of these IOCs and theknown IOCs with this, Google and

(02:34):
Syssa have shared.
This includes specific web pagepatterns and exploit artifacts.
So you can go look up those aswell.
And when it comes to trying toprotect against any kind of
active thrusts that arehappening right now, you can
block or quarantine thehigh-risk web traffic at your
gateways where possible.

(02:55):
Enforce Chrome's built-insecurity features like safe
browsing and their enhancedprotection, and use endpoint
controls to block outdatedversions in your environment.
For hunting within yourenvironment, search your EDR
logs for a recent Chromeactivity that looks suspicious.
Those will be things likeunusual memory access, child

(03:15):
process creation, or outboundconnections to unknown domains.
You can integrate your threatintelligence feeds for the
latest Chrome exploitindicators.
And again, SISA has added thoseto the known exploited
vulnerabilities catalog, so youcan go find them there.
And it's important to get theword out within your
organization here.
So make sure you're informingother teams and colleagues

(03:38):
within your organization andthat you guys are taking steps
to force updates on all of theendpoints.
Whether you're doing that via aGPO, an endpoint management
tool, or going from device todevice to manually update, make
sure it's being done anddocumented.
The bottom line here is thatattackers have no issue treating

(03:58):
everyday tools and applicationswe all use as their primary
targets.
SOCs have to treat patching as acritical control and go actively
hunt for anomalous browserbehavior.
Those are steps that arecritical to stop attacks before
they can gain a foothold orescalate into a serious
incident.
And here's some closing thoughtsand a call to action here.

(04:21):
Google's emergency Chrome updateis a clear reminder that even
the most common software canbecome a vector for serious
compromise when zero days are inplay.
Patching systems quickly andcommunicating these threats
within your organization arecritical to be ahead of the
attackers.
Stay on top of patching because2026 is moving fast.

(04:43):
This week, verify Chrome isupdated across your organization
and run one quick hunt foranomalous browser activity.
And again, I know I harp it allthe time, but patching is so
critical.
Have a patch process, do itregularly, document it, and
you'll be able to stay ahead ofa lot of threats that are coming

(05:05):
out there.
And that's a wrap for thisepisode of the Sock Brief.
Do you have questions or haveyour own browser zero day
stories?
Hit us up on social media or viaour website.
Keep your eyes open, keepsharpening those skills, and
we'll talk soon.
As always, stay secure outthere.
Bye.