CVE-2022-27926

Vulnerability Profile Updated 3 months ago

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CVE-2022-27926 is a software vulnerability identified in Zimbra instances. This flaw in software design or implementation has been exploited by Winter Vivern (also known as TA473), a Russian hacking group, to gain unauthorized access to sensitive email communications. The targets of this cyber espionage have included NATO officials, governments, military personnel, and diplomats, indicating the severity and potential geopolitical implications of this security breach. The exploitation of CVE-2022-27926 by Winter Vivern was first reported by Proofpoint researchers in March 2023. Prior to this, the group had been known to exploit other vulnerabilities, such as CVE-2020-35730 in Roundcube, for which proofs of concept are readily available online. With the shift to exploiting the Zimbra vulnerability, Winter Vivern demonstrated its adaptability and ongoing threat to cybersecurity. In response to these findings, it's critical for organizations using Zimbra to apply patches promptly to mitigate the risk posed by CVE-2022-27926. In addition to patching, organizations are advised to adopt comprehensive cybersecurity measures, including regular system updates and user education, to protect against similar threats in the future. The actions of Winter Vivern underscore the broader risks associated with unpatched software and the importance of proactive security management.

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Possible Aliases / Cluster overlaps

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ID	Votes	Profile Description

Miscellaneous Associations

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Zimbra

JavaScript

Proofpoint

Government

exploited

Html

roundcube

Eset

Vulnerability

XSS (Cross S...

Exploit

Associated Malware

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ID	Type	Votes	Profile Description
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Associated Threat Actors

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ID	Type	Votes	Profile Description
Ta473	has used	4	TA473, also known as Winter Vivern and UAC-0114, is a Russian advanced persistent threat (APT) group that has been active since at least February 2023. The group focuses on cyber espionage, supporting Russian and Belarusian geopolitical objectives, especially in the context of the Russia-Ukraine con
Winter Vivern	Unspecified	3	Winter Vivern is a threat actor group that has recently been active in the cybersecurity landscape. This group, which is believed to align with the interests of Belarus, has been involved in a series of malicious activities targeting different entities. They have notably exploited a zero-day vulnera

Associated Vulnerabilities

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ID	Type	Votes	Profile Description
CVE-2022-2792	Unspecified	1	None
CVE-2020-35730	Unspecified	1	CVE-2020-35730 is a Cross-Site Scripting (XSS) vulnerability in Roundcube Webmail, first discovered three years ago. The flaw has been actively exploited by threat actors in various campaigns. In the BlueDelta and APT28 campaigns, spear-phishing techniques were employed, with email attachments desig

Source Document References

Information about the CVE-2022-27926 Vulnerability was read from the documents corpus below. This display is limited to 20 results, create a free account to see more

Source	CreatedAt	Title
BankInfoSecurity	8 months ago	Google Says 4 Attack Campaigns Exploited Zimbra Zero-Day
CERT-EU	9 months ago	Russian hacking group seen exploiting Roundcube webmail zero-day
Securityaffairs	9 months ago	Winter Vivern APT exploited zero-day in Roundcube webmail software in recent attacks
CERT-EU	9 months ago	Roundcube webmail zero-day exploited to spy on government entities (CVE-2023-5631) - Help Net Security
ESET	10 months ago	Mass-spreading campaign targeting Zimbra users
CERT-EU	a year ago	Zimbra credentials targeted in global phishing campaign
CERT-EU	a year ago	Ongoing Phishing Campaign Targets Zimbra Collaborations Email Servers Worldwide
CERT-EU	a year ago	Manually patch this Zimbra bug that's under attack
CSO Online	a year ago	APT group Winter Vivern exploits Zimbra webmail flaw to target government entities
BankInfoSecurity	a year ago	Phishing Campaign Tied to Russia-Aligned Cyberespionage
Securityaffairs	a year ago	Russian group Winter Vivern targets email portals of NATO and diplomats
CERT-EU	a year ago	Winter Vivern APT Targets European Government Entities with Zimbra Vulnerability
CERT-EU	a year ago	NATO and Diplomats' Email Portals Targeted by Russian APT Winter Vivern
CERT-EU	a year ago	Winter Vivern Hackers Exploit Zimbra Flaw to Siphon NATO Emails \| IT Security News
CERT-EU	a year ago	Zimbra email platform vulnerability exploited to steal European govt emails
CERT-EU	a year ago	Windows, Linux systems subjected to Chinese state-backed cyberattacks
CERT-EU	a year ago	NATO countries targeted by Winter Vivern via Zimbra vulnerability
CERT-EU	a year ago	CISA Adds One Known Exploited Vulnerability to Catalog \| CISA
Securityaffairs	a year ago	CISA adds Zimbra bug exploited in attacks against NATO countries to its Known Exploited Vulnerabilities catalog