CVE-2026-16277

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory published 2026-07-20. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
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: None knownExposed: 0

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

A stack-based buffer overflow was found in rpcbind's rpcinfo utility. When querying a remote rpcbind service with rpcinfo -l, address information returned by the server is copied into a fixed-size buffer without sufficient bounds checking. A malicious or compromised rpcbind server could use this flaw to crash the rpcinfo client, resulting in a denial of service. The highest threat from this vulnerability is to system availability.

CVSS v3
6.5
EG Score
6.5(high)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

July 20, 2026

Last Modified

July 21, 2026

Advisory Details (4)

Auto-updated Jul 21, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: redhat.
generic🔴 Active Exploitation

LFS and BLFS consolidated list of security advisories

https://www.linuxfromscratch.org/blfs/advisories/consolidated.html
generic

git.linux-nfs.org Git - steved/rpcbind.git/commitdiff

https://git.linux-nfs.org/?p=steved/rpcbind.git;a=commitdiff;h=bb9bb7286a4c345442946dc2ce3c9e7f67e96d4d
redhat

2462085 – (CVE-2026-16277) CVE-2026-16277 rpcbind: rpcbind: stack buffer overflow in rpcinfo rpcbaddrlist()

https://bugzilla.redhat.com/show_bug.cgi?id=2462085
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-16277

Vendor Advisories for CVE-2026-16277(2)

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 17× in last 7d / 21× 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. 2026-07-27 14:13 UTCEPSS rescore
  2. 2026-07-27 12:46 UTCEG score recompute
  3. 2026-07-27 12:46 UTCVendor advisory
  4. 2026-07-27 12:46 UTCGHSA enrichment
  5. 2026-07-26 14:54 UTCEPSS rescore
  6. 2026-07-26 14:54 UTCEPSS rescore
  7. 2026-07-26 10:49 UTCEG score recompute
  8. 2026-07-26 10:48 UTCGHSA enrichment
  9. 2026-07-25 14:17 UTCEPSS rescore
  10. 2026-07-25 14:17 UTCEPSS rescore
  11. 2026-07-24 14:17 UTCEPSS rescore
  12. 2026-07-23 14:18 UTCEPSS rescore
  13. 2026-07-23 03:05 UTCEG score recompute
  14. 2026-07-22 23:39 UTCEG score recompute
  15. 2026-07-22 23:39 UTCGHSA enrichment
  16. 2026-07-22 14:08 UTCEPSS rescore
  17. 2026-07-21 15:24 UTCEPSS rescore
  18. 2026-07-20 16:40 UTCEG score recompute
  19. 2026-07-20 16:39 UTCGHSA enrichment
  20. 2026-07-20 14:32 UTCEG score recompute
  21. 2026-07-20 14:32 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-16277?
CVE-2026-16277 is a medium vulnerability published on July 20, 2026. A stack-based buffer overflow was found in rpcbind's rpcinfo utility. When querying a remote rpcbind service with rpcinfo -l, address information returned by the server is copied into a fixed-size buffer without sufficient bounds checking. A malicious or compromised rpcbind server could use this…
When was CVE-2026-16277 disclosed?
CVE-2026-16277 was first published in the National Vulnerability Database on July 20, 2026, with the most recent update on July 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16277 actively exploited?
CVE-2026-16277 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 80.0% of all scored CVEs.
What is the CVSS score of CVE-2026-16277?
CVE-2026-16277 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-16277?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16277, 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-2026-16277

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