CVE-2026-27556

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-16. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 8.8Exploit: None knownExposed: 0

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

A low-privileged remote attacker can exploit a local file inclusion vulnerability in the /index.php/ajax/save_iodd_parameters endpoint using a valid operator cookie allowing execution of arbitrary PHP code on the device.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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
Severity88% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
57%
KEV
Not listed

Published

September 16, 2026

Last Modified

September 16, 2026

Advisory Details (2)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

Phoenix Contact: Multiple vulnerabilities in the firmware of IOL MA8 EIP DI8 and IOL MA8 PN DI8 devices

https://www.certvde.com/en/advisories/VDE-2026-027/
generic

Pepperl+Fuchs: ICE2-* and ICE3-* are affected by multiple security vulnerabilities

https://www.certvde.com/en/advisories/VDE-2026-014/

Vendor Advisories for CVE-2026-27556(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 21× 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. 2026-09-20 06:54 UTCGHSA enrichment
  2. 2026-09-19 18:51 UTCEG score recompute
  3. 2026-09-19 18:51 UTCGHSA enrichment
  4. 2026-09-19 06:56 UTCEG score recompute
  5. 2026-09-19 06:56 UTCGHSA enrichment
  6. 2026-09-18 19:28 UTCEPSS rescore
  7. 2026-09-18 19:27 UTCEPSS rescore
  8. 2026-09-18 19:02 UTCGHSA enrichment
  9. 2026-09-18 07:07 UTCEG score recompute
  10. 2026-09-18 07:07 UTCGHSA enrichment
  11. 2026-09-17 19:30 UTCEPSS rescore
  12. 2026-09-17 19:13 UTCGHSA enrichment
  13. 2026-09-17 07:18 UTCGHSA enrichment
  14. 2026-09-16 19:24 UTCEG score recompute
  15. 2026-09-16 19:24 UTCGHSA enrichment
  16. 2026-09-16 18:52 UTCEG score recompute
  17. 2026-09-16 18:52 UTCGHSA enrichment
  18. 2026-09-16 14:08 UTCEPSS rescore
  19. 2026-09-16 08:23 UTCEG score recompute
  20. 2026-09-16 07:58 UTCEG score recompute
  21. 2026-09-16 07:54 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-27556?
CVE-2026-27556 is a high vulnerability published on September 16, 2026. A low-privileged remote attacker can exploit a local file inclusion vulnerability in the /index.php/ajax/saveioddparameters endpoint using a valid operator cookie allowing execution of arbitrary PHP code on the device.
When was CVE-2026-27556 disclosed?
CVE-2026-27556 was first published in the National Vulnerability Database on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-27556 actively exploited?
CVE-2026-27556 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 43.0% of all scored CVEs.
What is the CVSS score of CVE-2026-27556?
CVE-2026-27556 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-27556?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-27556, 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-2026-27556

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