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CVE-2021-33477rxvt-unicode 9.22, rxvt 2.7.10, mrxvt 0.5.4, and Eterm 0.9.7 allow (potentially remote) code execution because of improper handling of…
- 8.8HighCVSS base score
- 4.1%Exploitation in 30 daysEPSS · top 9.1% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
rxvt-unicode 9.22, rxvt 2.7.10, mrxvt 0.5.4, and Eterm 0.9.7 allow (potentially remote) code execution because of improper handling of certain escape sequences (ESC G Q). A response is terminated by a newline.
Timeline
ID reserved
By mitre
Published
- 3 years later
· 3 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 | High8.8 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 4.1% · top 9.1% of all CVEs (14 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
n/a
- affected n/a
References
References20
- https://www.openwall.com/lists/oss-security/2021/05/17/1 (opens in a new tab)x_refsource_MISCx_transferred
- https://www.openwall.com/lists/oss-security/2017/05/01/20 (opens in a new tab)x_refsource_MISCx_transferred
- http://cvs.schmorp.de/rxvt-unicode/src/command.C?r1=1.582&r2=1.583 (opens in a new tab)x_refsource_MISCx_transferred
- https://packetstormsecurity.com/files/162621/rxvt-2.7.0-rxvt-unicode-9.22-Code-Execution.html (opens in a new tab)x_refsource_MISCx_transferred
- https://sourceforge.net/projects/rxvt/files/rxvt-dev/ (opens in a new tab)x_refsource_MISCx_transferred
- http://cvs.schmorp.de/rxvt-unicode/Changes?view=log (opens in a new tab)x_refsource_MISCx_transferred
- https://sourceforge.net/projects/materm/files/mrxvt%20source/ (opens in a new tab)x_refsource_MISCx_transferred
- https://git.enlightenment.org/apps/eterm.git/log/ (opens in a new tab)x_refsource_MISCx_transferred
- GLSA-202105-17 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_transferred
- [debian-lts-announce] 20210530 [SECURITY] [DLA 2671-1] rxvt-unicode security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- FEDORA-2021-a4c0a91884 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2021-5b96f0f5db (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2021-c883ca2a37 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2021-8b85b2de05 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- [debian-lts-announce] 20210609 [SECURITY] [DLA 2681-1] eterm security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [debian-lts-announce] 20210609 [SECURITY] [DLA 2683-1] rxvt security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [debian-lts-announce] 20210609 [SECURITY] [DLA 2682-1] mrxvt security update (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- FEDORA-2021-71556a5722 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2021-0d3268fc35 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- GLSA-202209-07 (opens in a new tab)vendor-advisoryx_refsource_GENTOOx_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)
- EUVD EUVD-2021-20180 (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://cveledger.app/cve/CVE-2021-33477)Record last updated .