CVE-2021-26937

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.

• CWE-88

• http://www.openwall.com/lists/oss-security/2021/02/09/8Exploit, Mailing List, Third Party Advisory
• https://ftp.gnu.org/gnu/screen/Product
• https://lists.debian.org/debian-lts-announce/2021/02/msg00031.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNWBOIDEPOEQS5RMQVMFKHKXJCGNYWBL/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJWLXP45POUUYBJRRWPVAWNZDJTLYWVM/
• https://lists.gnu.org/archive/html/screen-devel/2021-02/msg00000.htmlExploit, Mailing List, Vendor Advisory
• https://security.gentoo.org/glsa/202105-11Third Party Advisory
• https://www.debian.org/security/2021/dsa-4861Third Party Advisory
• https://www.openwall.com/lists/oss-security/2021/02/09/3Exploit, Mailing List, Third Party Advisory
• http://www.openwall.com/lists/oss-security/2021/02/09/8Exploit, Mailing List, Third Party Advisory
• https://ftp.gnu.org/gnu/screen/Product
• https://lists.debian.org/debian-lts-announce/2021/02/msg00031.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNWBOIDEPOEQS5RMQVMFKHKXJCGNYWBL/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JJWLXP45POUUYBJRRWPVAWNZDJTLYWVM/
• https://lists.gnu.org/archive/html/screen-devel/2021-02/msg00000.htmlExploit, Mailing List, Vendor Advisory
• https://security.gentoo.org/glsa/202105-11Third Party Advisory
• https://security.netapp.com/advisory/ntap-20250509-0004/
• https://www.debian.org/security/2021/dsa-4861Third Party Advisory
• https://www.openwall.com/lists/oss-security/2021/02/09/3Exploit, Mailing List, Third Party Advisory

Published

Feb 9, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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• CVE-2021-26931An issue was discovered in the Linux kernel 2.6.39 through 5…5.5
• CVE-2021-26932An issue was discovered in the Linux kernel 3.2 through 5.10…5.5
• CVE-2021-26933An issue was discovered in Xen 4.9 through 4.14.x. On Arm, a…5.5
• CVE-2021-26934An issue was discovered in the Linux kernel 4.18 through 5.1…7.8
• CVE-2021-26935In WoWonder < 3.1, remote attackers can gain access to the d…7.5
• CVE-2021-26936The replay-sorcery program in ReplaySorcery 0.4.0 through 0.…7.8
• CVE-2021-26938A stored XSS issue exists in henriquedornas 5.2.17 via onlin…5.4
• CVE-2021-26939An information disclosure issue exists in henriquedornas 5.2…7.5
• CVE-2021-26940Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…
• CVE-2021-26943The UX360CA BIOS through 303 on ASUS laptops allow an attack…8.2
• CVE-2021-26945An integer overflow leading to a heap-buffer overflow was fo…5.5
• CVE-2021-26946Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultID…