Is CVE-2021-23177 being actively exploited?

CVE-2021-23177 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2021-23177?

CVE-2021-23177 has a CVSS 3.1 base score of 7.8 (HIGH).

CVE-2021-23177

HIGH · CVSS 7.8EPSS 0.4%EU EUVD

An improper link resolution flaw while extracting an archive can lead to changing the access control list (ACL) of the target of the link. An attacker may provide a malicious archive to a victim user, who would trigger this flaw when trying to extract the archive. A local attacker may use this flaw to change the ACL of a file on the system and gain more privileges.

Key facts

CVSS score: 7.8 (v3.1)
Severity: HIGH
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-59
EPSS score: 0.4% (31th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2021-10287)
Published: August 23, 2022
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2021-10287 in the EU Vulnerability Database. Last updated in EUVD on August 3, 2024.

View on the EU Vulnerability Database

Affected products

debian / debian linux
fedoraproject / fedora
libarchive / libarchive
redhat / codeready linux builder
redhat / enterprise linux
redhat / enterprise linux eus
redhat / enterprise linux for ibm z systems
redhat / enterprise linux for ibm z systems eus
redhat / enterprise linux for power little endian
redhat / enterprise linux for power little endian eus
redhat / enterprise linux server aus
redhat / enterprise linux server for power little endian update services for sap solutions
redhat / enterprise linux server tus

Certified products that may be affected

24 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Red Hat Enterprise Linux 8 NSS Cryptographic Module - Red Hat, Inc. - FIPS 140 5513 - active
Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, LLC - FIPS 140 5461 - active
Red Hat Enterprise Linux 8 Kernel Cryptographic API - Red Hat, Inc. - FIPS 140 5089 - active
Red Hat Enterprise Linux 8.6 - Red Hat, Inc. - Common Criteria CCEVS-VR-VID-11309-2024 - archived
Red Hat Enterprise Linux 8 OpenSSL Cryptographic Module - Red Hat®, Inc. - FIPS 140 4642 - historical

See all 24 in the Security Certifications Explorer.

References

https://access.redhat.com/security/cve/CVE-2021-23177(Third Party Advisory)
https://bugzilla.redhat.com/show_bug.cgi?id=2024245(Issue Tracking, Patch, Third Party Advisory)
https://github.com/libarchive/libarchive/commit/fba4f123cc456d2b2538f811bb831483bf336bad(Patch, Third Party Advisory)
https://github.com/libarchive/libarchive/issues/1565(Issue Tracking, Patch, Third Party Advisory)
https://lists.debian.org/debian-lts-announce/2022/11/msg00030.html(Mailing List, Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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