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CVE-2020-9497
Apache Guacamole 1.1.0 and older do not properly validate datareceived from RDP servers via static virtual channels. If a userconnects to…
Medium4.4EPSS 0.79%
- Published
- Updated
- Reserved
- Assigned by
- apache
Description
Apache Guacamole 1.1.0 and older do not properly validate datareceived from RDP servers via static virtual channels. If a userconnects to a malicious or compromised RDP server, specially-craftedPDUs could result in disclosure of information within the memory ofthe guacd process handling the connection.
Timeline
ID reserved
By apache
- 4 months later
· 4 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium4.4 | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:N/A:N |
- EPSS (exploitation in 30 days)
- 0.79% · top 43% of all CVEs (7 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.4.
Weakness
- Information Disclosure
- CWE-20 (opens in a new tab)All about CWE-20 and its CVEs
Affected products
Apache Guacamole
- affected Apache Guacamole 1.1.0 and older
References (11)
- https://lists.apache.org/thread.html/r65f75d3d65d1af68141f42071ebb27dda24af3e45570e593c1dbd81f%40%3Cannounce.guacamole.apache.org%3E (opens in a new tab)x_refsource_MISCx_transferred
- [announce] 20200701 [SECURITY] CVE-2020-9497: Apache Guacamole: Improper input validation of RDP static virtual channels (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [guacamole-user] 20200703 Re: [SECURITY] CVE-2020-9497: Apache Guacamole: Improper input validation of RDP static virtual channels (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [guacamole-user] 20200703 RE: [SECURITY] CVE-2020-9497: Apache Guacamole: Improper input validation of RDP static virtual channels (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- https://research.checkpoint.com/2020/apache-guacamole-rce/ (opens in a new tab)x_refsource_MISCx_transferred
- https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44525 (opens in a new tab)x_refsource_CONFIRMx_transferred
- [debian-lts-announce] 20201106 [SECURITY] [DLA 2435-1] guacamole-server security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- FEDORA-2020-bfde0ab889 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2020-640645e518 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- [announce] 20210125 Apache Software Foundation Security Report: 2020 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [announce] 20210223 Re: Apache Software Foundation Security Report: 2020 (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2020-9497)Record last updated .