CVEDB API

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-93638

A reflected cross-site scripting vulnerability in the login page of Zimbra Collaboration Suite (ZCS) allows an unauthenticated attacker to execute JavaScript through the zrememberme parameter. A crafted relogin URL selects a two-factor error display that inserts the parameter into a hidden input attribute without HTML encoding. A victim who opens the URL receives attacker-controlled script and page content under the legitimate Zimbra origin, allowing credential capture through a replacement login form. The relogin path logs out an existing session before rendering the payload, so the demonstrated attack does not inherit that session's mailbox access. ZCS 10.1.16 and 10.1.17 are affected.

Exploit prediction scoring system (EPSS) score

EPSS Score 0.002

EPSS Ranking 11.3%

CVSS Severity

CVSS v3 Score 6.1

References

Products affected by CVE-2026-93638

Synacor » Zimbra Collaboration Suite » Version: 10.0.0

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.0
Synacor » Zimbra Collaboration Suite » Version: 10.0.1

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.1
Synacor » Zimbra Collaboration Suite » Version: 10.0.10

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.10
Synacor » Zimbra Collaboration Suite » Version: 10.0.11

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.11
Synacor » Zimbra Collaboration Suite » Version: 10.0.12

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.12
Synacor » Zimbra Collaboration Suite » Version: 10.0.13

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.13
Synacor » Zimbra Collaboration Suite » Version: 10.0.14

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.14
Synacor » Zimbra Collaboration Suite » Version: 10.0.15

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.15
Synacor » Zimbra Collaboration Suite » Version: 10.0.16

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.16
Synacor » Zimbra Collaboration Suite » Version: 10.0.17

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.17
Synacor » Zimbra Collaboration Suite » Version: 10.0.18

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.18
Synacor » Zimbra Collaboration Suite » Version: 10.0.2

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.2
Synacor » Zimbra Collaboration Suite » Version: 10.0.3

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.3
Synacor » Zimbra Collaboration Suite » Version: 10.0.4

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.4
Synacor » Zimbra Collaboration Suite » Version: 10.0.5

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.5
Synacor » Zimbra Collaboration Suite » Version: 10.0.6

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.6
Synacor » Zimbra Collaboration Suite » Version: 10.0.7

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.7
Synacor » Zimbra Collaboration Suite » Version: 10.0.8

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.8
Synacor » Zimbra Collaboration Suite » Version: 10.0.9

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.0.9
Synacor » Zimbra Collaboration Suite » Version: 10.1.0

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.0
Synacor » Zimbra Collaboration Suite » Version: 10.1.1

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.1
Synacor » Zimbra Collaboration Suite » Version: 10.1.10

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.10
Synacor » Zimbra Collaboration Suite » Version: 10.1.11

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.11
Synacor » Zimbra Collaboration Suite » Version: 10.1.12

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.12
Synacor » Zimbra Collaboration Suite » Version: 10.1.13

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.13
Synacor » Zimbra Collaboration Suite » Version: 10.1.14

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.14
Synacor » Zimbra Collaboration Suite » Version: 10.1.15

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.15
Synacor » Zimbra Collaboration Suite » Version: 10.1.16

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.16
Synacor » Zimbra Collaboration Suite » Version: 10.1.17

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.17
Synacor » Zimbra Collaboration Suite » Version: 10.1.2

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.2
Synacor » Zimbra Collaboration Suite » Version: 10.1.3

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.3
Synacor » Zimbra Collaboration Suite » Version: 10.1.4

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.4
Synacor » Zimbra Collaboration Suite » Version: 10.1.5

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.5
Synacor » Zimbra Collaboration Suite » Version: 10.1.6

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.6
Synacor » Zimbra Collaboration Suite » Version: 10.1.7

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.7
Synacor » Zimbra Collaboration Suite » Version: 10.1.8

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.8
Synacor » Zimbra Collaboration Suite » Version: 10.1.9

cpe:2.3:a:synacor:zimbra_collaboration_suite:10.1.9
Synacor » Zimbra Collaboration Suite » Version: 6.0.0

cpe:2.3:a:synacor:zimbra_collaboration_suite:6.0.0
Synacor » Zimbra Collaboration Suite » Version: 6.0.1

cpe:2.3:a:synacor:zimbra_collaboration_suite:6.0.1
Synacor » Zimbra Collaboration Suite » Version: 6.0.10

cpe:2.3:a:synacor:zimbra_collaboration_suite:6.0.10
Synacor » Zimbra Collaboration Suite » Version: 6.0.12

cpe:2.3:a:synacor:zimbra_collaboration_suite:6.0.12
Synacor » Zimbra Collaboration Suite » Version: 6.0.13

cpe:2.3:a:synacor:zimbra_collaboration_suite:6.0.13
Synacor » Zimbra Collaboration Suite » Version: 6.0.14

cpe:2.3:a:synacor:zimbra_collaboration_suite:6.0.14
Synacor » Zimbra Collaboration Suite » Version: 6.0.15

cpe:2.3:a:synacor:zimbra_collaboration_suite:6.0.15
Synacor » Zimbra Collaboration Suite » Version: 6.0.16

cpe:2.3:a:synacor:zimbra_collaboration_suite:6.0.16
Synacor » Zimbra Collaboration Suite » Version: 6.0.2

cpe:2.3:a:synacor:zimbra_collaboration_suite:6.0.2
Synacor » Zimbra Collaboration Suite » Version: 6.0.3

cpe:2.3:a:synacor:zimbra_collaboration_suite:6.0.3
Synacor » Zimbra Collaboration Suite » Version: 6.0.4

cpe:2.3:a:synacor:zimbra_collaboration_suite:6.0.4
Synacor » Zimbra Collaboration Suite » Version: 6.0.5

cpe:2.3:a:synacor:zimbra_collaboration_suite:6.0.5
Synacor » Zimbra Collaboration Suite » Version: 6.0.6

cpe:2.3:a:synacor:zimbra_collaboration_suite:6.0.6
Synacor » Zimbra Collaboration Suite » Version: 6.0.7

cpe:2.3:a:synacor:zimbra_collaboration_suite:6.0.7
Synacor » Zimbra Collaboration Suite » Version: 6.0.8

cpe:2.3:a:synacor:zimbra_collaboration_suite:6.0.8
Synacor » Zimbra Collaboration Suite » Version: 6.0.9

cpe:2.3:a:synacor:zimbra_collaboration_suite:6.0.9
Synacor » Zimbra Collaboration Suite » Version: 7.2.7

cpe:2.3:a:synacor:zimbra_collaboration_suite:7.2.7
Synacor » Zimbra Collaboration Suite » Version: 8.0.0

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.0.0
Synacor » Zimbra Collaboration Suite » Version: 8.0.1

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.0.1
Synacor » Zimbra Collaboration Suite » Version: 8.0.2

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.0.2
Synacor » Zimbra Collaboration Suite » Version: 8.0.3

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.0.3
Synacor » Zimbra Collaboration Suite » Version: 8.0.4

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.0.4
Synacor » Zimbra Collaboration Suite » Version: 8.0.5

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.0.5
Synacor » Zimbra Collaboration Suite » Version: 8.0.6

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.0.6
Synacor » Zimbra Collaboration Suite » Version: 8.0.7

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.0.7
Synacor » Zimbra Collaboration Suite » Version: 8.0.8

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.0.8
Synacor » Zimbra Collaboration Suite » Version: 8.0.9

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.0.9
Synacor » Zimbra Collaboration Suite » Version: 8.5.0

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.5.0
Synacor » Zimbra Collaboration Suite » Version: 8.5.1

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.5.1
Synacor » Zimbra Collaboration Suite » Version: 8.6.0

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.6.0
Synacor » Zimbra Collaboration Suite » Version: 8.7.0

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.0
Synacor » Zimbra Collaboration Suite » Version: 8.7.1

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.1
Synacor » Zimbra Collaboration Suite » Version: 8.7.10

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.10
Synacor » Zimbra Collaboration Suite » Version: 8.7.11

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.11
Synacor » Zimbra Collaboration Suite » Version: 8.7.2

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.2
Synacor » Zimbra Collaboration Suite » Version: 8.7.3

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.3
Synacor » Zimbra Collaboration Suite » Version: 8.7.4

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.4
Synacor » Zimbra Collaboration Suite » Version: 8.7.5

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.5
Synacor » Zimbra Collaboration Suite » Version: 8.7.6

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.6
Synacor » Zimbra Collaboration Suite » Version: 8.7.7

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.7
Synacor » Zimbra Collaboration Suite » Version: 8.7.8

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.8
Synacor » Zimbra Collaboration Suite » Version: 8.7.9

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.7.9
Synacor » Zimbra Collaboration Suite » Version: 8.8.0

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.0
Synacor » Zimbra Collaboration Suite » Version: 8.8.1

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.1
Synacor » Zimbra Collaboration Suite » Version: 8.8.10

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.10
Synacor » Zimbra Collaboration Suite » Version: 8.8.11

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.11
Synacor » Zimbra Collaboration Suite » Version: 8.8.12

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.12
Synacor » Zimbra Collaboration Suite » Version: 8.8.15

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.15
Synacor » Zimbra Collaboration Suite » Version: 8.8.2

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.2
Synacor » Zimbra Collaboration Suite » Version: 8.8.3

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.3
Synacor » Zimbra Collaboration Suite » Version: 8.8.4

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.4
Synacor » Zimbra Collaboration Suite » Version: 8.8.5

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.5
Synacor » Zimbra Collaboration Suite » Version: 8.8.6

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.6
Synacor » Zimbra Collaboration Suite » Version: 8.8.7

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.7
Synacor » Zimbra Collaboration Suite » Version: 8.8.8

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.8
Synacor » Zimbra Collaboration Suite » Version: 8.8.9

cpe:2.3:a:synacor:zimbra_collaboration_suite:8.8.9
Synacor » Zimbra Collaboration Suite » Version: 9.0.0

cpe:2.3:a:synacor:zimbra_collaboration_suite:9.0.0

Vulnerabilities

Vulnerable Software

Vulnerability Details CVE-2026-93638

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