CVE-2021-41767

mediumpriority · track · 27EPSS 0.019 · 80 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.93% (80th) EPSS

CVSS 4 · medium

Is it mine?

4 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · osv · nvd

EPSS · scored 2026-10-27

Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user's active use of that same connection.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04mediumAV:N/AC:L/Au:S/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 8 · impact 2.9

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 2.8 · impact 3.6

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-200USprimary

affected products (4)

Products and version ranges known to be affected.

Apache Software Foundation Apache Guacamole≤ unspecified ≤1.3.0enisa_euvdEU
apache guacamole≤ 1.3.0nvdUScpe:2.3:a:apache:guacamole:*:*:*:*:*:*:*:*
Bitnami guacamole< 1.3.0osvUSpkg:bitnami/guacamole
Bitnami guacamole-server< 1.3.0osvUSpkg:bitnami/guacamole-server

advisories (2)

Vendor and ecosystem advisories describing this.

BIT-guacamole-2021-417672024-03-06vendor · osvUS
Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user's active use of that same connection.
BIT-guacamole-server-2021-417672024-03-06vendor · osvUS
Apache Guacamole 1.3.0 and older may incorrectly include a private tunnel identifier in the non-private details of some REST responses. This may allow an authenticated user who already has permission to access a particular connection to read from or interact with another user's active use of that same connection.

also known as (5)

Other names and identifiers for this entity.

CNNVD-202201-889 cnnvd
EUVD-2021-28775 enisa_euvd
GHSA-8jvg-8759-x9j6 enisa_euvd
BIT-guacamole-2021-41767osv
BIT-guacamole-server-2021-41767osv

sources

Which sources assert this record, and when.

cnnvd enisa_euvd osv nvd NVD CVE.org MITRE

published 2022-01-11modified 2026-06-17

related (19,407)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2026-20133US	high7.5OT critical	31.5% (98th)	KEV	2026-02-25
A vulnerability in Cisco Catalyst SD-WAN Software could allow an unauthenticated, remote attacker to view sensitive information on an affected system. This vulnerability is due…
CVE-2026-20128US	—OT critical	7.32% (94th)	KEV	2026-02-25
A vulnerability in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain DCA user privileges on an affect…
CVE-2026-20122US	medium5.4OT critical	25.8% (98th)	KEV	2026-02-25
A vulnerability in the API of Cisco Catalyst SD-WAN Manager could allow an authenticated, remote attacker to overwrite arbitrary files on the local file system. To exploit this vul…
CVE-2025-68686US	—OT critical	29.5% (98th)	KEV	2026-02-10
An Exposure of Sensitive Information to an Unauthorized Actor vulnerability [CWE-200] vulnerability in Fortinet FortiOS 7.6.0 through 7.6.1, FortiOS 7.4.0 through 7.4.6, FortiOS 7.…
CVE-2026-20805US	—OT critical	7.46% (94th)	KEV	2026-01-13
Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker to disclose information locally.

+19402 more

references (7)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan