CVE-2022-24682 [Exploited] | Synacor Zimbra Collaboration Suite

CVE-2022-24682 is rated Critical Active Threat (84.9/100): CVSS Medium severity, with high exploitation likelihood (EPSS 88.63%, 100th percentile). CISA KEV confirms active exploitation (added 2022-02-25) affecting Synacor / Zimbra Collaborate Suite (ZCS). a weakness (CWE-116) Unauthenticated remote administrative access may be possible. The CISA remediation deadline has passed—treat as an emergency patch priority.

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Link

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#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-05-13	87.97%	88.63%	+0.66%
2	2026-04-11	88.39%	87.97%	-0.42%
3	2026-04-10	—	88.39%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-05-13

87.97%

88.63%

+0.66%

2026-04-11

88.39%

87.97%

-0.42%

2026-04-10

—

88.39%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
6.1	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:L) Some sensitive info could get out, but not a total data dump. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:N) Service keeps running; no real outage angle.	2.8	2.7	[email protected]
6.1	3.1	MEDIUM	`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N` Click to expand Attack vector (AV:N) Could be attacked over the internet or any normal routed network—not just someone sitting at the machine. Attack complexity (AC:L) Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup. Privileges required (PR:N) No account or special rights needed—anonymous or random user is enough. User interaction (UI:R) A real person has to do something—click, install, enable—otherwise it doesn’t land. Scope (S:C) Breaking this can reach past the original component and bite other resources—bigger blast radius. Confidentiality (C:L) Some sensitive info could get out, but not a total data dump. Integrity (I:L) Attackers could change some data, but it’s limited—not everything goes. Availability (A:N) Service keeps running; no real outage angle.	2.8	2.7	134c704f-9b21-4f2e-91b3-4a467353bcc0
4.3	2.0	MEDIUM	`AV:N/AC:M/Au:N/C:N/I:P/A:N` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:M) Exploitation needs some favorable conditions, but not exceptional ones. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:P) Partial integrity impact. Availability impact (A:N) No availability impact.	8.6	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

6.1

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L): Some sensitive info could get out, but not a total data dump.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N): Service keeps running; no real outage angle.

2.8

2.7

[email protected]

6.1

3.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Click to expand

Attack vector (AV:N): Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L): Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N): No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R): A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:C): Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:L): Some sensitive info could get out, but not a total data dump.
Integrity (I:L): Attackers could change some data, but it’s limited—not everything goes.
Availability (A:N): Service keeps running; no real outage angle.

2.8

2.7

134c704f-9b21-4f2e-91b3-4a467353bcc0

4.3

2.0

MEDIUM

AV:N/AC:M/Au:N/C:N/I:P/A:N Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:M): Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:P): Partial integrity impact.
Availability impact (A:N): No availability impact.

8.6

2.9

[email protected]

Affected software / configurations for CVE-2022-24682

Vendor	Product	Version	Raw CPE
synacor	zimbra_collaboration_suite	>= 8.8.0, < 8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite::::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:-::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p1::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p10::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p11::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p12::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p13::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p14::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p15::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p16::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p17::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p18::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p19::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p2::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p20::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p21::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p22::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p23::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p24::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p25::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p26::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p27::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p28::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p29::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p3::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p4::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p5::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p6::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p7::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p8::::::
synacor	zimbra_collaboration_suite	8.8.15	cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15:p9::::::

References for CVE-2022-24682

URL	Tags
https://blog.zimbra.com/2022/02/hotfix-available-5-feb-for-zero-day-exploit-vulnerability-in-zimbra-8-8-15/	Vendor Advisory
https://wiki.zimbra.com/wiki/Security_Center	Vendor Advisory
https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P30	Release Notes Vendor Advisory
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories	Vendor Advisory
https://www.volexity.com/blog/2022/02/03/operation-emailthief-active-exploitation-of-zero-day-xss-vulnerability-in-zimbra/	Exploit Third Party Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-24682	US Government Resource

URL

CVE-2022-24682

CISA KEV Record for CVE-2022-24682

Public exploit references (Exploit-DB) for CVE-2022-24682

Exploit prediction scoring system (EPSS) score for CVE-2022-24682

Common vulnerability scoring system (CVSS) metrics for CVE-2022-24682

Weakness enumeration for CVE-2022-24682

Affected software / configurations for CVE-2022-24682

References for CVE-2022-24682