rxvt-unicode 9.22, rxvt 2.7.10, mrxvt 0.5.4, and Eterm 0.9.7 allow (potentially remote)…
Priority MEDIUM 45CWE-755Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.04089 90th percentileScored 2026-11-08
Public exploit Yes 2 exploit referencesTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:eterm_project:eterm:0.9.7:*:*:*:*:*:*:* | 0.9.7 | Vulnerable | Eterm Project |
| cpe:2.3:a:mrxvt_project:mrxvt:0.5.4:*:*:*:*:*:*:* | 0.5.4 | Vulnerable | Mrxvt Project |
| cpe:2.3:a:rxvt-unicode_project:rxvt-unicode:9.22:*:*:*:*:*:*:* | 9.22 | Vulnerable | Rxvt-unicode Project |
| cpe:2.3:a:rxvt_project:rxvt:2.7.10:*:*:*:*:*:*:* | 2.7.10 | Vulnerable | The RXVT Project |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 34 | Vulnerable | Fedoraproject |
| cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* | 9.0 | Vulnerable | Debian |
- cpe:2.3:a:eterm_project:eterm:0.9.7:*:*:*:*:*:*:* Versions 0.9.7 Vulnerable ·Eterm Project
- cpe:2.3:a:mrxvt_project:mrxvt:0.5.4:*:*:*:*:*:*:* Versions 0.5.4 Vulnerable ·Mrxvt Project
- cpe:2.3:a:rxvt-unicode_project:rxvt-unicode:9.22:*:*:*:*:*:*:* Versions 9.22 Vulnerable ·Rxvt-unicode Project
- cpe:2.3:a:rxvt_project:rxvt:2.7.10:*:*:*:*:*:*:* Versions 2.7.10 Vulnerable ·The RXVT Project
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
- cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:* Versions 9.0 Vulnerable ·Debian
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2021-33477
- 2026-10-03 Alias added: GHSA-vm2c-wqqr-v3gc
References
Exploit 2
Advisory 17
- https://www.openwall.com/lists/oss-security/2017/05/01/20
- https://sourceforge.net/projects/rxvt/files/rxvt-dev/
- http://cvs.schmorp.de/rxvt-unicode/Changes?view=log
- https://sourceforge.net/projects/materm/files/mrxvt%20source/
- https://git.enlightenment.org/apps/eterm.git/log/
- GLSA-202105-17
- [debian-lts-announce] 20210530 [SECURITY] [DLA 2671-1] rxvt-unicode security update
- FEDORA-2021-a4c0a91884
- FEDORA-2021-5b96f0f5db
- FEDORA-2021-c883ca2a37
- FEDORA-2021-8b85b2de05
- [debian-lts-announce] 20210609 [SECURITY] [DLA 2681-1] eterm security update
- [debian-lts-announce] 20210609 [SECURITY] [DLA 2683-1] rxvt security update
- [debian-lts-announce] 20210609 [SECURITY] [DLA 2682-1] mrxvt security update
- FEDORA-2021-71556a5722
- FEDORA-2021-0d3268fc35
- GLSA-202209-07
Sources
- CVE-2021-33477 · CVE Program
- CVE-2021-33477 · NVD
- FIRST EPSS
- GHSA-vm2c-wqqr-v3gc · GitHub Advisory Database · CC BY 4.0
- CVE-2021-33477 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences