--===============7030741780259502659==
Content-Type: multipart/alternative; boundary="===============5409120848824285579=="
MIME-Version: 1.0

--===============5409120848824285579==
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable

Cybersecurity and Infrastructure Security Agency (CISA)

You are subscribed to Cybersecurity Advisories for Cybersecurity and Infras= tructure Security Agency. This information has recently been updated and is=
now available.

CISA, NSA and Partners Release Joint Cybersecurity Advisory on Russian Stat= e-Supported Phishing Campaign Targeting Zimbra Collaboration Suite Users [ = https://www.cisa.gov/news-events/cybersecurity-advisories/aa26-204a ] 07/23= /2026 10:20 PM EST=20

Today, the Cybersecurity and Infrastructure Security Agency (CISA) and Nati= onal Security Agency (NSA), along with U.S. government and international pa= rtners, released a Joint Cybersecurity Advisory, Russian State-Supported Cy= ber Actors Conduct Phishing Campaign Targeting Users of Zimbra Collaboratio=
n Suite [ https://www.cisa.gov/news-events/cybersecurity-advisories/aa26-20=
4a ] detailing malicious activity by the Russian state-supported threat gro=
up primarily known as LAUNDRY BEAR.

Since July 2025, LAUNDRY BEAR has targeted Zimbra Collaboration Suite (ZCS)=
webmail users in various U.S. organizations across the Defense Industrial = Base, federal and local government, education, energy, law enforcement, med= ia, technology, and non-governmental organizations (NGOs). The group uses n= ovel data exfiltration and aggregation capability called =E2=80=9CUlej=E2= =80=9D (Russian for Beehive) to exploit CVE-2025-66376 [ https://www.cve.or= g/CVERecord?id=3DCVE-2025-66376 ]. Unlike traditional phishing that tries t=
o persuade users to take an action, LAUNDRY BEAR=E2=80=99s campaign leverag=
es a view-based exploit that only requires users to view a malicious email = within a vulnerable version of the ZCS webmail service. Once viewed, the ex= ploit can exfiltrate email communications, directories, and other sensitive=
data.

Synacor released a patch for CVE 2025-66376 [ https://www.cve.org/CVERecord= ?id=3DCVE-2025-66376 ] for both 10.1.13 and 10.0.18 versions of ZCS in Nove= mber 2025 and the vulnerability was added to CISA=E2=80=99s Known Exploited=
Vulnerabilities (KEV) catalog in March 2026 [ https://www.cisa.gov/news-ev= ents/alerts/2026/03/18/cisa-adds-one-known-exploited-vulnerability-catalog =
]. LAUNDRY BEAR=E2=80=99s approach is notable for its manual identification=
of target organizations and persistent access attempts, indicating a focus=
ed espionage effort. The actors have shifted tactics, now distributing mali= cious emails from previously compromised accounts to further evade detectio=
n.

*If your organization uses ZCS:*


* Ensure your ZCS software is patched and fully updated.=20
* If patching is not possible, avoid using the Classic ZCS webmail client=
and use alternative mail clients.=20
* Monitor for unusual activity, such as high volumes of outbound data, su= spicious queries, or connections from virtual private network (VPN) provide=
rs commonly used by threat actors.=20

Read the full advisory [ https://www.cisa.gov/news-events/cybersecurity-adv= isories/aa26-204a ] and implement the detection and mitigation recommendati= ons to protect your organization=E2=80=99s email infrastructure.

Please share your thoughts with us through this anonymous survey [ https://= cisasurvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?Source=3DGovDeliv= eryRussianTargetZCS ]. We appreciate your feedback.

This product is provided subject to this Notification [ https://www.cisa.go= v/notification ] and this Privacy & Use [ https://www.cisa.gov/privacy-poli=
cy ] policy.

body { font-size: 1em; font-family: Arial, Verdana, sans-serif; font-weight=
: normal; font-style: normal; color: #333333; }=20

Having trouble viewing this message?=C2=A0View it as a webpage [ https://co= ntent.govdelivery.com/accounts/USDHSCISA/bulletins/421c284 ].=C2=A0 [ https= ://content.govdelivery.com/accounts/USDHS/bulletins/292141e ]

You are subscribed to updates from the Cybersecurity and Infrastructure Sec= urity Agency [ https://www.cisa.gov ] (CISA)
Manage Subscriptions [ https://public.govdelivery.com/accounts/USDHSCISA/su= bscriber/edit?preferences=3Dtrue#tab1 ]=C2=A0=C2=A0|=C2=A0=C2=A0Privacy Pol= icy [ https://www.cisa.gov/privacy-policy ]=C2=A0=C2=A0|=C2=A0 Help [ https= ://subscriberhelp.granicus.com/s/article/Subscriber-Help-Center ] [ https:/= /insights.govdelivery.com/Communications/Subscriber_Help_Center ]

Connect with CISA:=20
Facebook [ https://www.facebook.com/CISA ]=C2=A0 |=C2=A0 Twitter [ https://= twitter.com/CISAgov ]=C2=A0 |=C2=A0 Instagram [ https://Instagram.com/cisag=
ov ]=C2=A0 |=C2=A0 LinkedIn [ https://www.linkedin.com/company/cybersecurit= y-and-infrastructure-security-agency ]=C2=A0 |=C2=A0=C2=A0 YouTube [ https:= //www.youtube.com/channel/UCxyq9roe-npgzrVwbpoAy0A ]

________________________________________________________________________

This email was sent to cisa@toolazy.synchro.net using Granicus Communicatio=
ns Cloud, on behalf of: Cybersecurity and Infrastructure Security Agency = =C2=B7 707 17th St, Suite 4000 =C2=B7 Denver, CO 80202 GovDelivery logo [ h= ttps://granicus.com/solution/digital-communication-engagement/ ]=20
body .abe-column-block { min-height: 5px; } table.gd_combo_table img {margi= n-left:10px; margin-right:10px;} table.gd_combo_table div.govd_image_displa=
y img, table.gd_combo_table td.gd_combo_image_cell img {margin-left:0px; ma= rgin-right:0px;}

--===============5409120848824285579==
Content-Type: text/html; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns=3D"http://www.w3.org/1999/xhtml" xml:lang=3D"en" lang=3D"en"> <head>
<title> CISA, NSA and Partners Release Joint Cybersecurity Advisory on R= ussian State-Supported Phishing Campaign Targeting Zimbra Collaboration Sui=
te Users
</title>


</head>
<body style=3D"">

<table width=3D"700" border=3D"0" cellspacing=3D"0" cellpadding=3D"0"=
align=3D"center">
<tr>
<td>

<!--[if (gte mso 9)|(IE)]>
<table style=3D"display:none"><tr><td><a name=3D"gd_top" id=3D"gd_top"></= a></td></tr></table>
<![endif]-->
<a name=3D"gd_top" id=3D"gd_top"></a>

=20



<p><img src=3D"https://content.govdelivery.com/attachments/fancy_images/U= SDHSCISA/2020/06/3486054/05152023-gov-delivery-banner-copy_original.png" al= t=3D"Cybersecurity and Infrastructure Security Agency (CISA)" title=3D"" wi= dth=3D"600" height=3D"100"></p>
<p>You are subscribed to Cybersecurity Advisories for Cybersecurity and I= nfrastructure Security Agency. This information has recently been updated a=
nd is now available.</p>
<div class=3D"rss_item" style=3D"margin-bottom: 2em;">
<div class=3D"rss_title" style=3D"font-weight: bold; font-size: 120%; margi=
n: 0 0 0.3em; padding: 0;"><a href=3D"https://www.cisa.gov/news-events/cybe= rsecurity-advisories/aa26-204a" target=3D"_blank" title=3D"CISA, NSA and Pa= rtners Release Joint Cybersecurity Advisory on Russian State-Supported Phis= hing Campaign Targeting Zimbra Collaboration Suite Users" rel=3D"noopener">= CISA, NSA and Partners Release Joint Cybersecurity Advisory on Russian Stat= e-Supported Phishing Campaign Targeting Zimbra Collaboration Suite Users</a= ></div>
<div class=3D"rss_pub_date" style=3D"font-size: 90%; font-style: italic; co= lor: #666666; margin: 0 0 0.3em; padding: 0;">07/23/2026 10:20 PM EST</div> <div class=3D"l-page-section l-page-section--rich-text csaf-imported">
<div class=3D"l-constrain">
<div class=3D"l-page-section__content">
<p>Today, the Cybersecurity and Infrastructure Security Agency (CISA) and N= ational Security Agency (NSA), along with U.S. government and international=
partners, released a Joint Cybersecurity Advisory, <a href=3D"https://www.= cisa.gov/news-events/cybersecurity-advisories/aa26-204a" target=3D"_blank" = title=3D"Russian State-Supported Cyber Actors Conduct Phishing Campaign Tar= geting Users of Zimbra Collaboration Suite" rel=3D"noopener">Russian State-= Supported Cyber Actors Conduct Phishing Campaign Targeting Users of Zimbra = Collaboration Suite</a> detailing malicious activity by the Russian state-s= upported threat group primarily known as LAUNDRY BEAR.</p>
<p>Since July 2025, LAUNDRY BEAR has targeted Zimbra Collaboration Suite (Z= CS) webmail users in various U.S. organizations across the Defense Industri=
al Base, federal and local government, education, energy, law enforcement, = media, technology, and non-governmental organizations (NGOs). The group use=
s novel data exfiltration and aggregation capability called =E2=80=9CUlej= =E2=80=9D (Russian for Beehive) to exploit <a href=3D"https://www.cve.org/C= VERecord?id=3DCVE-2025-66376" target=3D"_blank" title=3D"CVE-2025-66376" re= l=3D"noopener">CVE-2025-66376</a>. Unlike traditional phishing that tries t=
o persuade users to take an action, LAUNDRY BEAR=E2=80=99s campaign leverag=
es a view-based exploit that only requires users to view a malicious email = within a vulnerable version of the ZCS webmail service. Once viewed, the ex= ploit can exfiltrate email communications, directories, and other sensitive=
data.</p>
<p>Synacor released a patch for <a href=3D"https://www.cve.org/CVERecord?id= =3DCVE-2025-66376" target=3D"_blank" title=3D"CVE 2025-66376" rel=3D"noopen= er">CVE 2025-66376</a> for both 10.1.13 and 10.0.18 versions of ZCS in Nove= mber 2025 and the vulnerability was added to <a href=3D"https://www.cisa.go= v/news-events/alerts/2026/03/18/cisa-adds-one-known-exploited-vulnerability= -catalog" target=3D"_blank" title=3D"CISA=E2=80=99s Known Exploited Vulnera= bilities (KEV) catalog in March 2026" rel=3D"noopener">CISA=E2=80=99s Known=
Exploited Vulnerabilities (KEV) catalog in March 2026</a>. LAUNDRY BEAR=E2= =80=99s approach is notable for its manual identification of target organiz= ations and persistent access attempts, indicating a focused espionage effor=
t. The actors have shifted tactics, now distributing malicious emails from = previously compromised accounts to further evade detection.</p>
<p><strong>If your organization uses ZCS:</strong></p>

<li>Ensure your ZCS software is patched and fully updated.</li>
<li>If patching is not possible, avoid using the Classic ZCS webmail client=
and use alternative mail clients.</li>
<li>Monitor for unusual activity, such as high volumes of outbound data, su= spicious queries, or connections from virtual private network (VPN) provide=
rs commonly used by threat actors.</li>
</ul>
<p>Read the <a href=3D"https://www.cisa.gov/news-events/cybersecurity-advis= ories/aa26-204a" target=3D"_blank" title=3D"Russian State-Supported Cyber A= ctors Conduct Phishing Campaign Targeting Users of Zimbra Collaboration Sui= te" rel=3D"noopener">full advisory</a> and implement the detection and miti= gation recommendations to protect your organization=E2=80=99s email infrast= ructure.</p>
<p>Please share your thoughts with us through this <a href=3D"https://cisas= urvey.gov1.qualtrics.com/jfe/form/SV_9n4TtB8uttUPaM6?Source=3DGovDeliveryRu= ssianTargetZCS" target=3D"_blank" title=3D"anonymous survey" rel=3D"noopene= r">anonymous survey</a>. We appreciate your feedback.</p>
<p>This product is provided subject to this <a href=3D"https://www.cisa.gov= /notification" target=3D"_blank" rel=3D"noopener">Notification</a> and this=
<a href=3D"https://www.cisa.gov/privacy-policy" target=3D"_blank" rel=3D"n= oopener">Privacy &amp; Use</a> policy.</p>
</div>
</div>
</div>
</div>
<style>body {
font-size: 1em; font-family: Arial, Verdana, sans-serif; font-weight: norma=
l; font-style: normal; color: #333333;
}
</style>
=20


<div id=3D"mail_footer">
<p style=3D"text-align: center;"><span style=3D"font-size: 10.0pt; colo=
r: #757575;">Having trouble viewing this message?=C2=A0</span><a href=3D"ht= tps://content.govdelivery.com/accounts/USDHSCISA/bulletins/421c284" target= =3D"_blank" rel=3D"noopener">View it as a webpage</a>.=C2=A0<a href=3D"http= s://content.govdelivery.com/accounts/USDHS/bulletins/292141e" target=3D"_bl= ank" rel=3D"noopener"></a><span style=3D"font-size: 10.0pt; color: #757575;= "></span></p>
<p style=3D"text-align: center;"><span style=3D"font-size: 10.0pt; color: #= 757575;">You are subscribed to updates from the </span><a href=3D"https://w= ww.cisa.gov"><span style=3D"font-size: 10.0pt;">Cybersecurity and Infrastru= cture Security Agency</span></a><span style=3D"font-size: 10.0pt; color: #7= 57575;"> (CISA)<br></span><a href=3D"https://public.govdelivery.com/account= s/USDHSCISA/subscriber/edit?preferences=3Dtrue#tab1" target=3D"_blank" rel= =3D"noopener"><span style=3D"font-size: 10.0pt; color: #00568c;">Manage Sub= scriptions</span></a>=C2=A0=C2=A0<span style=3D"font-size: 10.0pt; color: #= 757575;">|=C2=A0=C2=A0</span><a href=3D"https://www.cisa.gov/privacy-policy=
" target=3D"_blank" rel=3D"noopener"><span style=3D"font-size: 10.0pt; colo=
r: #00568c;">Privacy Policy</span></a><span style=3D"font-size: 10.0pt; col= or: #757575;">=C2=A0=C2=A0|=C2=A0 <a href=3D"https://subscriberhelp.granicu= s.com/s/article/Subscriber-Help-Center" target=3D"_blank" rel=3D"noopener">= Help</a><a href=3D"https://insights.govdelivery.com/Communications/Subscrib= er_Help_Center" target=3D"_blank" rel=3D"noopener"></a></span><span style= =3D"font-size: 10.0pt; color: #757575;"></span></p>
<p style=3D"text-align: center;"><span style=3D"font-size: 10.0pt; color: #= 757575;">Connect with CISA: <br></span><a href=3D"https://www.facebook.com/= CISA" target=3D"_blank" rel=3D"noopener"><span style=3D"font-size: 10.0pt; = color: #00568c;">Facebook</span></a><span style=3D"font-size: 10.0pt; color=
: #757575;">=C2=A0 |=C2=A0 </span><a href=3D"https://twitter.com/CISAgov" t= arget=3D"_blank" rel=3D"noopener"><span style=3D"font-size: 10.0pt; color: = #00568c;">Twitter</span></a><span style=3D"font-size: 10.0pt; color: #75757= 5;">=C2=A0 |=C2=A0 </span><a href=3D"https://Instagram.com/cisagov" target= =3D"_blank" rel=3D"noopener"><span style=3D"font-size: 10.0pt; color: #0056= 8c;">Instagram</span></a><span style=3D"font-size: 10.0pt; color: #757575;"= >=C2=A0 |=C2=A0 </span><a href=3D"https://www.linkedin.com/company/cybersec= urity-and-infrastructure-security-agency" target=3D"_blank" rel=3D"noopener= "><span style=3D"font-size: 10.0pt; color: #00568c;">LinkedIn</span></a><sp=
an style=3D"font-size: 10.0pt; color: #757575;">=C2=A0 |=C2=A0=C2=A0 </span= ><a href=3D"https://www.youtube.com/channel/UCxyq9roe-npgzrVwbpoAy0A" targe= t=3D"_self"><span style=3D"font-size: 10.0pt; color: #00568c;">YouTube</spa= n></a><span style=3D"font-size: 10.0pt; color: #757575;"></span></p>

</div>
<div id=3D"tagline">
<hr>
<table style=3D"width: 100%;" border=3D"0" cellspacing=3D"0" cellpadding=3D=

<tbody>

<td style=3D"color: #757575; font-size: 10px; font-family: Arial;" width=3D= "89%">This email was sent to cisa@toolazy.synchro.net using Granicus Commun= ications Cloud, on behalf of: Cybersecurity and Infrastructure Security Age= ncy =C2=B7 707 17th St, Suite 4000 =C2=B7 Denver, CO 80202</td>
<td align=3D"right" width=3D"11%"><a href=3D"https://granicus.com/solution/= digital-communication-engagement/" target=3D"_blank" rel=3D"noopener"><img = src=3D"https://content.govdelivery.com/images/govd-logo-dark.png" border=3D= "0" alt=3D"GovDelivery logo" width=3D"115"></a></td>
</tr>
</tbody>
</table>
<style type=3D"text/css">body .abe-column-block { min-height: 5px; } table.= gd_combo_table img {margin-left:10px; margin-right:10px;} table.gd_combo_ta= ble div.govd_image_display img, table.gd_combo_table td.gd_combo_image_cell=
img {margin-left:0px; margin-right:0px;}</style>

</div>
</td>
</tr>
</table>

<img alt=3D"" src=3D"https://links-2.govdelivery.com/CI0/0101019f8f5eb8b1-d= 991085b-601d-402a-8f90-0a284ae28fcd-000000/v1dMePmdlzfGqXBRuClvYtX3DCn3prs_= 0zx8nKV2EHo=3D452" style=3D"display: none; width: 1px; height: 1px;">
</body>
</html>

--===============5409120848824285579==--

--===============7030741780259502659==--