CVE-2026-20118

MEDIUMPre-NVD 6.86.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 6.8 from GitHub Security Advisory (severity: MODERATE) published 2026-03-11. A secondary CVSS source baseline 6.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-11224 (ENISA EUVD) · GHSA-vgpf-3m99-q785 (GitHub Security Advisories)Source: ENISA EUVD

6.8EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 6.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

A vulnerability in the handling of an Egress Packet Network Interface (EPNI) Aligner interrupt in Cisco IOS XR Software for Cisco Network Convergence System (NCS) 5500 Series with NC57 line cards and Cisco NCS 5700 Routers and Cisco IOS XR Software for Third Party Software could allow an unauthenticated, remote attacker to cause the network processing unit (NPU) and ASIC to stop processing, preventing traffic from traversing the interface. This vulnerability is due to the corruption of packets in specific cases when an EPNI Aligner interrupt is triggered while an affected device is experiencing heavy transit traffic. An attacker could exploit this vulnerability by sending a continuous flow of crafted packets to an interface of the affected device. A successful exploit could allow the attacker to cause persistent, heavy packet loss, resulting in a denial of service (DoS) condition. Note: If active exploitation of this vulnerability is suspected, contact the Cisco Technical Assistance Center (TAC) or your contracted maintenance provider. Cisco has assigned this security advisory a Security Impact Rating (SIR) of High rather than Medium as the score indicates. This change was made because the affected device operates within a critical network segment where compromise could lead to significant disruption or exposure, thereby elevating the overall risk beyond the base technical severity.

CVSS v3
6.8
EG Score
6.8MEDIUMmedium confidence
EG Risk
31
EG Risk 31/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity68% × 45%
Impact severity (EG Severity): CVSS 6.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.4% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.4%
EPSS %ILE
31st
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.8): severity, escalated by confirmed exploitation. This CVE's 6.8 is its impact severity (EG Severity), not escalated.

EG Severity
6.8 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.4% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-07). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

March 11, 2026

Last Modified

June 17, 2026

Advisory Details (1)

Auto-updated Aug 4, 2026
Patch available.
Web page

Cisco IOS XR Egress Packet Network Interface Aligner Interrupt Denial of Service Vulnerability

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xrncs-epni-int-dos-TWMffUsN

Vendor Advisories for CVE-2026-20118(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 8× in last 7d / 31× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 123 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 23 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  2. 2026-11-11 16:39 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  3. 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  4. 2026-11-09 16:34 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  5. 2026-11-08 16:38 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  6. 2026-11-07 19:42 UTCGHSA enrichmentGHSA-vgpf-3m99-q785 · GitHub severity MODERATE · GitHub CVSS 6.8
  7. 2026-11-07 19:42 UTCEchelonGraph re-scored
  8. 2026-11-07 16:38 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  9. 2026-11-06 16:37 UTCEPSS rescoreEPSS 0.4% · 31st percentile
  10. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  11. 2026-11-03 16:47 UTCEPSS rescoreEPSS 0.3% · 27th percentile
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  14. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.3% · 27th percentile
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  17. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  18. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  19. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  20. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  21. 2026-10-25 14:44 UTCEchelonGraph re-scored
  22. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  23. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.3% · 25th percentile
  24. 2026-10-23 05:51 UTCEchelonGraph re-scored
  25. 2026-10-23 05:51 UTCGHSA enrichmentGHSA-vgpf-3m99-q785 · GitHub CVSS 6.8
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  1. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  2. 2026-10-21 16:32 UTCEPSS rescoreEPSS 0.3% · 24th percentile
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  5. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  6. 2026-10-18 03:57 UTCEchelonGraph re-scored
  7. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  8. 2026-10-16 16:41 UTCEPSS rescoreEPSS 0.3% · 24th percentile
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  12. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  13. 2026-10-12 16:24 UTCEchelonGraph re-scored
  14. 2026-10-11 20:06 UTCEchelonGraph re-scored
  15. 2026-10-11 17:19 UTCEchelonGraph re-scored
  16. 2026-10-11 14:51 UTCEchelonGraph re-scored
  17. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  18. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.3% · 24th percentile
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  33. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 25th percentile
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  61. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  62. 2026-08-16 11:53 UTCEchelonGraph re-scored
  63. 2026-08-16 11:53 UTCGHSA enrichmentGHSA-vgpf-3m99-q785 · GitHub CVSS 6.8
  64. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  65. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  66. 2026-08-14 07:51 UTCEchelonGraph re-scored
  67. 2026-08-14 07:51 UTCGHSA enrichmentGHSA-vgpf-3m99-q785 · GitHub CVSS 6.8
  68. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  69. 2026-08-12 23:02 UTCEchelonGraph re-scored
  70. 2026-08-12 23:02 UTCGHSA enrichmentGHSA-vgpf-3m99-q785 · GitHub CVSS 6.8
  71. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  72. 2026-08-11 21:52 UTCEchelonGraph re-scored
  73. 2026-08-11 21:52 UTCGHSA enrichmentGHSA-vgpf-3m99-q785 · GitHub CVSS 6.8
  74. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.3% · 24th percentile
  75. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 24th percentile

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Frequently asked(5)

What is CVE-2026-20118?
CVE-2026-20118 is a medium-severity vulnerability; its CVE record was published on March 11, 2026. A vulnerability in the handling of an Egress Packet Network Interface (EPNI) Aligner interrupt in Cisco IOS XR Software for Cisco Network Convergence System (NCS) 5500 Series with NC57 line cards and Cisco NCS 5700 Routers and Cisco IOS XR Software for Third Party Software could allow an…
When was the CVE record for CVE-2026-20118 published?
The CVE record for CVE-2026-20118 was published on March 11, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of June 17, 2026; the record at its source may have been updated since.
Is CVE-2026-20118 actively exploited?
CVE-2026-20118 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (31st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-20118?
CVE-2026-20118 has a CVSS base score of 6.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-20118?
A fix for CVE-2026-20118 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-20118 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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