---
cve: "CVE-2021-26937"
severity: "LOW"
cvss: 3.1
epss: "9.2%"
vendor: "n/a"
kev: false
exploited: false
published: "2021-02-09 20:15:14"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-11T09:32:22+02:00"
---

# CVE-2021-26937

> 3.1 LOW

## Beschreibung

encoding.c in GNU Screen through 4.8.0 allows remote attackers to cause a denial of service (invalid write access and application crash) or possibly have unspecified other impact via a crafted UTF-8 character sequence.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Referenzen

- <https://lists.gnu.org/archive/html/screen-devel/2021-02/msg00000.html>
- <https://www.openwall.com/lists/oss-security/2021/02/09/3>
- <https://ftp.gnu.org/gnu/screen/>
- <http://www.openwall.com/lists/oss-security/2021/02/09/8>
- <https://lists.debian.org/debian-lts-announce/2021/02/msg00031.html>
- <https://www.debian.org/security/2021/dsa-4861>
- <https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJWLXP45POUUYBJRRWPVAWNZDJTLYWVM/>
- <https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNWBOIDEPOEQS5RMQVMFKHKXJCGNYWBL/>
- <https://security.gentoo.org/glsa/202105-11>
- <https://security.netapp.com/advisory/ntap-20250509-0004/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-26937) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_