CVE-2026-72712

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-08-11. the CNA's CVSS baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this weekElevated
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: Elevated riskExposed: 0

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

Nmap versions up to and including 7.99 contains a denial of service vulnerability that allows remote attackers to crash the application by sending a crafted packet containing a zero-length TCP option. The malformed packet forces the Packet:parse_options() function in nselib/packet.lua to allocate objects in an infinite loop, causing an out-of-memory condition that results in application crash.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity65% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 14, 2026

Advisory Details (4)

Auto-updated Aug 11, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

Nmap 7.99 Denial of Service via Zero-Length TCP Option Packet | Advisories | VulnCheck

https://www.vulncheck.com/advisories/nmap-denial-of-service-via-zero-length-tcp-option-packet
generic

Packet:parse_options() in nselib/packet.lua allows uncontrolled memory consumption (DoS) · Issue #3368 · nmap/nmap · GitHub

https://github.com/nmap/nmap/issues/3368
github_commit

commit 7ef4ee030a00 (nmap/nmap)

Fix landed in nmap/nmap commit 7ef4ee030a00 — awaiting tagged release

https://github.com/nmap/nmap/commit/7ef4ee030a0023fe22616387a000032e1a678b6a
generic

GitHub - nmap/nmap: Nmap - the Network Mapper. Github mirror of official SVN repository. · GitHub

https://github.com/nmap/nmap

Vendor Advisories for CVE-2026-72712(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 24× in last 7d / 36× 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. 2026-08-20 22:56 UTCEPSS rescore
  2. 2026-08-20 14:06 UTCEG score recompute
  3. 2026-08-20 14:06 UTCGHSA enrichment
  4. 2026-08-19 17:04 UTCEPSS rescore
  5. 2026-08-19 14:36 UTCGHSA enrichment
  6. 2026-08-18 15:16 UTCEG score recompute
  7. 2026-08-18 15:16 UTCGHSA enrichment
  8. 2026-08-18 13:49 UTCEPSS rescore
  9. 2026-08-18 13:49 UTCEPSS rescore
  10. 2026-08-17 14:32 UTCEG score recompute
  11. 2026-08-17 14:32 UTCGHSA enrichment
  12. 2026-08-17 13:47 UTCEPSS rescore
  13. 2026-08-16 15:24 UTCEG score recompute
  14. 2026-08-16 15:24 UTCGHSA enrichment
  15. 2026-08-16 14:56 UTCEPSS rescore
  16. 2026-08-16 14:56 UTCEPSS rescore
  17. 2026-08-16 02:15 UTCEPSS rescore
  18. 2026-08-15 16:17 UTCEG score recompute
  19. 2026-08-15 16:17 UTCGHSA enrichment
  20. 2026-08-15 01:31 UTCEPSS rescore
  21. 2026-08-14 17:09 UTCEG score recompute
  22. 2026-08-14 17:09 UTCGHSA enrichment
  23. 2026-08-14 14:36 UTCEG score recompute
  24. 2026-08-14 14:36 UTCGHSA enrichment
  25. 2026-08-13 22:00 UTCEPSS rescore
Show 11 more
  1. 2026-08-13 15:28 UTCEG score recompute
  2. 2026-08-13 15:28 UTCGHSA enrichment
  3. 2026-08-13 14:25 UTCEG score recompute
  4. 2026-08-13 14:25 UTCGHSA enrichment
  5. 2026-08-12 17:44 UTCEG score recompute
  6. 2026-08-12 17:44 UTCGHSA enrichment
  7. 2026-08-12 13:51 UTCEPSS rescore
  8. 2026-08-11 18:37 UTCEG score recompute
  9. 2026-08-11 18:37 UTCGHSA enrichment
  10. 2026-08-11 18:04 UTCEG score recompute
  11. 2026-08-11 18:00 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-72712?
CVE-2026-72712 is a medium vulnerability published on August 11, 2026. Nmap versions up to and including 7.99 contains a denial of service vulnerability that allows remote attackers to crash the application by sending a crafted packet containing a zero-length TCP option. The malformed packet forces the Packet:parse_options() function in nselib/packet.lua to allocate…
When was CVE-2026-72712 disclosed?
CVE-2026-72712 was first published in the National Vulnerability Database on August 11, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72712 actively exploited?
CVE-2026-72712 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 64.4% of all scored CVEs.
What is the CVSS score of CVE-2026-72712?
CVE-2026-72712 has a CVSS v4.0 base score of 6.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-72712?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-72712, 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

Explore the affected products and dependency analysis for CVE-2026-72712

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