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No exploitation reportedFix available

CVE-2021-23192

No exploitation reported by the sources we read.

  • Published2022-03-02
  • Fixed in4.15.2 · 4.14.10 · 4.13.14
  • WeaknessCWE-20

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A flaw was found in the way samba implemented DCE/RPC. If a client to a Samba server sent a very large DCE/RPC request, and chose to fragment it, an attacker could replace later fragments with their own data, bypassing the signature requirements.

Timeline

dates in UTC
  1. 2022-03-0223:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2021-23192?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2021-23192?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Samba
BranchAffectedFixed in
4.15≥ 4.15.0, < 4.15.24.15.2
4.14≥ 4.14.0, < 4.14.104.14.10
4.x≥ 4.10.0, < 4.13.144.13.14

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • samba-develAlmaLinux:8all versions · fixed in 4.14.5-7.el8_5and 3 other packages

Full record on NVD

Fix

  1. Update Samba to 4.15.2 · 4.14.10 · 4.13.14

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • NVDCVSS 3.17.5read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • CNAweakness (CWE)CWE-20read 2026-10-23
  • FIRST EPSSEPSS score2.0 %2026-10-23
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published
2022-03-02
Last Modified
2026-06-17
NVD status
Modified

Frequently asked questions

What is CVE-2021-23192?

A flaw was found in the way samba implemented DCE/RPC. If a client to a Samba server sent a very large DCE/RPC request, and chose to fragment it, an attacker could replace later fragments with their own data, bypassing the signature requirements.

Is CVE-2021-23192 actively exploited?

Active exploitation of CVE-2021-23192 has not been confirmed. Its EPSS score was 2.0% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-23192?

CVE-2021-23192 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

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