CVE-2021-3122

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 87.4%, top 0% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
Weaponized
9.8
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 87%
CISA-KEV: Not listedEPSS: 87%CVSS: 9.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

CMCAgent in NCR Command Center Agent 16.3 on Aloha POS/BOH servers permits the submission of a runCommand parameter (within an XML document sent to port 8089) that enables the remote, unauthenticated execution of an arbitrary command as SYSTEM, as exploited in the wild in 2020 and/or 2021. NOTE: the vendor's position is that exploitation occurs only on devices with a certain "misconfiguration."

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
84(Track*)
EG Risk 84/100SSVC: Track*

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation87% × 40%
Automatability30% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
99.7%
KEV
Not listed

Published

February 7, 2021

Last Modified

November 21, 2024

Advisory Details (2)

Auto-updated May 26, 2026
⚠️ Active exploitation confirmed. No patch confirmed yet.
generic

Incident Response Timeline - Arctic Wolf

https://www.tetradefense.com/incident-response-services/active-exploit-a-remote-code-execution-rce-vulnerability-for-ncr-aloha-point-of-sale/
generic🔴 Active Exploitation

CVE-2021-3122-Details/CVE-2021-3122 at main · acquiredsecurity/CVE-2021-3122-Details · GitHub

https://github.com/roughb8722/CVE-2021-3122-Details/blob/main/CVE-2021-3122

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 16× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-24 14:15 UTCEPSS rescore
  2. 2026-07-23 02:00 UTCEG score recompute
  3. 2026-07-22 22:47 UTCEG score recompute
  4. 2026-07-22 14:06 UTCEPSS rescore
  5. 2026-07-20 17:05 UTCEPSS rescore
  6. 2026-07-15 16:55 UTCEPSS rescore
  7. 2026-07-15 16:55 UTCEPSS rescore
  8. 2026-07-13 06:11 UTCEPSS rescore
  9. 2026-07-13 06:11 UTCEPSS rescore
  10. 2026-07-11 08:25 UTCEPSS rescore
  11. 2026-07-11 08:25 UTCEPSS rescore
  12. 2026-07-05 02:28 UTCEPSS rescore
  13. 2026-07-05 02:28 UTCEPSS rescore
  14. 2026-07-02 16:57 UTCEPSS rescore
  15. 2026-06-28 04:54 UTCEPSS rescore
  16. 2026-06-28 04:54 UTCEPSS rescore
  17. 2026-06-24 14:03 UTCEPSS rescore
  18. 2026-06-24 14:03 UTCEPSS rescore
  19. 2026-06-23 21:31 UTCEPSS rescore
  20. 2026-06-23 21:31 UTCEPSS rescore
  21. 2026-06-17 17:51 UTCEPSS rescore
  22. 2026-06-17 17:51 UTCEPSS rescore
  23. 2026-06-17 17:51 UTCEPSS rescore
  24. 2026-06-15 17:46 UTCEPSS rescore
  25. 2026-06-13 22:58 UTCEPSS rescore
Show 21 more
  1. 2026-06-13 22:58 UTCEPSS rescore
  2. 2026-06-11 13:58 UTCEPSS rescore
  3. 2026-06-11 13:58 UTCEPSS rescore
  4. 2026-06-10 13:20 UTCEPSS rescore
  5. 2026-06-07 15:23 UTCEPSS rescore
  6. 2026-06-07 15:23 UTCEPSS rescore
  7. 2026-06-05 22:45 UTCEPSS rescore
  8. 2026-06-01 13:50 UTCEPSS rescore
  9. 2026-06-01 13:50 UTCEPSS rescore
  10. 2026-05-31 22:29 UTCEPSS rescore
  11. 2026-05-31 22:29 UTCEPSS rescore
  12. 2026-05-31 00:15 UTCEPSS rescore
  13. 2026-05-31 00:15 UTCEPSS rescore
  14. 2026-05-29 13:42 UTCEPSS rescore
  15. 2026-05-27 13:39 UTCEPSS rescore
  16. 2026-05-27 13:39 UTCEPSS rescore
  17. 2026-05-26 21:13 UTCEG score recompute
  18. 2026-05-26 21:13 UTCGHSA enrichment
  19. 2026-05-26 07:17 UTCEPSS rescore
  20. 2026-05-26 07:17 UTCEPSS rescore
  21. 2026-05-26 07:17 UTCEPSS rescore

Publicly available exploits

(3 references)

Working exploit code is in the public domain (1 Metasploit module) (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCacquiredsecurity/CVE-2021-3122-Details
    First seen Feb 7, 2021
    Open source ↗
  • Metasploitexploit/windows/misc/ncr_cmcagent_rce✓ verified
    First seen Feb 7, 2021

    NCR Command Center Agent Remote Code Execution

    Open source ↗
  • Nucleinetwork/cves/2021/CVE-2021-3122.yaml
    First seen Jan 1, 2021

    NCR Command Center Agent 16.3 - Remote Command Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2021-3122?
CVE-2021-3122 is a critical vulnerability published on February 7, 2021. CMCAgent in NCR Command Center Agent 16.3 on Aloha POS/BOH servers permits the submission of a runCommand parameter (within an XML document sent to port 8089) that enables the remote, unauthenticated execution of an arbitrary command as SYSTEM, as exploited in the wild in 2020 and/or 2021. NOTE:…
When was CVE-2021-3122 disclosed?
CVE-2021-3122 was first published in the National Vulnerability Database on February 7, 2021, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-3122 actively exploited?
CVE-2021-3122 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2021-3122?
CVE-2021-3122 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2021-3122?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-3122, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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