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Topic

Email Security

The practice of protecting email systems and gateways from phishing, malware delivery, and exploitation of filtering and parsing software.

Current stories

securityConfirmed5 publishers

Exploited Cisco email gateway flaw lets a crafted attachment run commands as root

Cisco patched CVE-2026-76519, an exploited Secure Email Gateway flaw that gives unauthenticated attackers root through a crafted email attachment. Devices with File Reputation enabled and Content Scanner Tools earlier than 25.3.0.5525 are affected.

Perspective Coverage

5 publishers
Builder
Builder 13%
Operator
Operator 76%
Investor
Investor 11%

Reality

Evidence82
Adoption
Not scored
Hype gap+5
Incentives
Not scored
Confidence78
buildOne report1 publisher

Researcher reports an actively exploited root RCE in Cisco's Secure Email Gateway

Satyam Rastogi reports that Cisco patched a Secure Email Gateway zero-day that let unauthenticated attackers run commands as root, exploited before the fix. The post gives no CVE or fixed version, so SEG operators have the warning but no build to patch to.

Publishers:dev.to

Reality

Evidence25
Adoption
Not scored
Hype gap+20
Incentives
Not scored
Confidence35
productConfirmed4 publishers

Microsoft disables 20,000 accounts tied to Yam Store, a phishing kit marketplace

Microsoft and international partners dismantled the Yam Store phishing marketplace, whose kits enabled more than 1 billion malicious messages. Microsoft says buyers could deploy the pre-made kits very quickly, so a polished lure says little about the sender's skill.

Perspective Coverage

4 publishers
Builder
Builder 16%
Operator
Operator 56%
Investor
Investor 28%

Reality

Evidence55
Adoption70
Hype gap+15
Incentives60
Confidence65
securityOne report1 publisher

Fake CAPTCHA pages keep scanners out and get victims to run the malware themselves

Barracuda found CAPTCHA abuse in 43% of the phishing-kit attacks it examined during 2025. The check can keep automated scanners from reaching the next page, so a URL scan may inspect only the CAPTCHA.

Reality

Evidence45
Adoption43
Hype gap+10
Incentives40
Confidence55
buildOne report1 publisher

Attackers had 24 days to diff Zimbra's quiet 10.1.20 fix before CVE-2026-73570 was disclosed

Attackers are exploiting Zimbra Collaboration Suite flaw CVE-2026-73570, which Synacor fixed quietly in 10.1.20 on July 20 and disclosed on August 13. An upgrade closes the injection path, but a web shell written earlier stays on disk until someone finds it.

Publishers:infoq.com

Reality

Evidence58
Adoption30
Hype gap+10
Incentives
Not scored
Confidence55
buildOne report1 publisher

Fewer than half of the 1,000 most popular websites reject spoofed email

Just 474 of the 1,000 most popular websites set DMARC to reject spoofed mail, a dev.to survey of their DNS found. Thirty-two months after Google and Yahoo began requiring DMARC from bulk senders, 84.5% of the sites publish a record, but only 69.4% apply an enforcing policy to all their mail.

Publishers:dev.to

Reality

Evidence62
Adoption68
Hype gap0
Incentives
Not scored
Confidence60
securityOne report1 publisher

Barracuda finds phishing mail aimed at both the recipient and the AI that summarizes their inbox

Barracuda analyzed a phishing campaign pairing a password-protected attachment with hidden prompt injection aimed at the user's AI inbox summarizer. The filter that passes a message decides what the assistant reads, so the two need testing as one path.

Reality

Evidence45
Adoption
Not scored
Hype gap+10
Incentives
Not scored
Confidence50
buildOne report1 publisher

MFA-relaying proxy kits make up 44.6% of phishing techniques in Microsoft's 2026 report

Microsoft's 2026 Digital Defense Report puts MFA-relaying proxy kits at 44.6% of phishing techniques, as phishing rose to 23% of its incident cases. SMS codes and push approvals pass straight through those proxies, so protecting company email now means passkeys or FIDO2 keys, starting with admins and finance staff.

Publishers:dev.to

Reality

Evidence62
Adoption
Not scored
Hype gap+5
Incentives40
Confidence55
buildOne report1 publisher

Star Blizzard now delivers the CosmicPulse backdoor through fake event invitations

Microsoft says Russia's FSB-linked Star Blizzard sent fake event invitations to more than 100 organizations since January 2026. The lures pose as Chatham House and Atlantic Council events and carry a new Python backdoor, CosmicPulse, aimed at people working on Ukraine.

Publishers:dev.to

Reality

Evidence60
Adoption
Not scored
Hype gap+20
Incentives
Not scored
Confidence62
buildOne report1 publisher

Cisco email gateway flaw runs attacker SQL as root the moment it parses a message

CVE-2026-76461 lets a crafted email run SQL as root on Cisco Secure Email Gateway, with no workaround and a September 17 federal patch deadline from CISA. Because the trigger is mail parsing, every gateway in the mail path is in scope, whether or not it faces the internet.

Publishers:dev.to

Reality

Evidence55
Adoption
Not scored
Hype gap0
Incentives
Not scored
Confidence50
buildOne report1 publisher

CVE-2026-76441 lets unauthenticated attackers reach restricted functions on Cisco email gateways

CERT-In rates CVE-2026-76441 critical for letting unauthenticated remote attackers into restricted functions on Cisco email gateways 15.5 and earlier. The gateway inspects mail in both directions, so the fix belongs ahead of the next scheduled window, using the release Cisco's own advisory names.

Publishers:dev.to

Reality

Evidence45
Adoption
Not scored
Hype gap+5
Incentives
Not scored
Confidence50
securityOne report1 publisher

Defender missed 221 high-severity emails per 1,000 users in Microsoft's own benchmark

The May to July figures come from Microsoft and the competing vendors are unnamed. Miss counts are rising across reporting periods, Defender's included, and the third-party layer caught 0.30% of malicious mail.

Publishers:microsoft.com

Reality

Evidence45
Adoption30
Hype gap+30
Incentives85
Confidence55
buildOne report1 publisher

Abnormal AI runs agent-driven code in an ephemeral MicroVM on the inline email path

AWS's post on the deployment gives the sandbox defaults that decide whether it fits an inline path, among them a 15-minute session time-to-live configurable to eight hours and a choice between VPC-only and public internet access.

Publishers:aws.amazon.com

Reality

Evidence46
Adoption62
Hype gap+25
Incentives82
Confidence52
buildOne report1 publisher

Instinct's assistant sent an email in a tester's name without asking her first

Katie Jacobs Stanton said Instinct sent an email on her behalf without checking with her first, and a second tester reported inbox reads after she disconnected her Google account from the invite-only assistant.

Publishers:dev.to

Reality

Evidence48
Adoption24
Hype gap+18
Incentives62
Confidence46
securityOne report1 publisher

Attackers are planting PHP webshells through the WordPress Super Forms upload flaw

CVE-2026-14894 gives an unauthenticated attacker code execution on a WordPress site, and the fix is Super Forms 6.3.314. Microsoft separately reports invisible Unicode tag characters at up to 2.37 million messages a day.

Publishers:securityweek.com

Reality

Evidence45
Adoption30
Hype gap+10
Incentives40
Confidence45
securityOne report1 publisher

A 472-character invisible payload steered an email summarizer into reporting only the attacker's text

Forcepoint X-Labs hid instructions in zero-pixel white HTML and watched a summarizer repeat them as fact. The measurement is new; two named practitioners say the design flaw it measures has been documented since 2023.

Reality

Evidence58
Adoption22
Hype gap+27
Incentives72
Confidence60
leadershipOne report1 publisher

Attackers repurposed prompt injection's invisible Unicode to break email keyword matching

Microsoft's hunt for email-borne prompt injection instead surfaced a three-month phishing campaign hiding tag characters inside words like funding, which puts both problems on one detection team's desk.

Publishers:microsoft.com

Reality

Evidence58
Adoption62
Hype gap+12
Incentives68
Confidence55
productOne report1 publisher

Claude's Gmail agent turns one approval toggle into your whole outbound policy

Claude will send, reply and forward once you switch approval off, which leaves that review step doing double duty as the feature's only brake and as the sole defence anyone can name against prompt injection.

Publishers:engadget.com

Reality

Evidence42
Adoption
Not scored
Hype gap+12
Incentives35
Confidence45

Earlier coverage