CVE-2026-62947

MEDIUMPre-NVD 4.94.9—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 4.9 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 58% 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, secondary
Elevated
4.9EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 4.9Exploit: Elevated riskExposed: 0

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

OpenWrt is a Linux operating system targeting embedded devices. Prior to 25.12.5, the cgi-download handler in cgi-io authorizes the requested path against the caller's ubus session file ACL before canonicalization, and rpcd session.c uses fnmatch() without FNM_PATHNAME, allowing traversal such as an allowed wildcard prefix followed by ../ to read root-readable files including /etc/shadow. This vulnerability is fixed in 25.12.5.

CVSS v3
4.9
EG Score
4.9(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity49% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
42%
KEV
Not listed

Published

July 15, 2026

Last Modified

July 21, 2026

Advisory Details (4)

Auto-updated Jul 16, 2026
Patch available. Sources: github_pr, github_release, github, github_commit.
github Patch Available

ACL bypass and arbitrary root file read via cgi-io cgi-download · Advisory · openwrt/openwrt · GitHub

https://github.com/openwrt/openwrt/security/advisories/GHSA-jw5r-xhf5-2xcq
github_release Patch Available

v25.12.5

Patch available: openwrt/openwrt v25.12.5

https://github.com/openwrt/openwrt/releases/tag/v25.12.5
github_pr

Security/canonicalize path acl bypass

Fix merged in openwrt/cgi-io PR #4 on 2026-06-27 — awaiting tagged release

https://github.com/openwrt/cgi-io/pull/4
github_commit

commit 72990b748987 (openwrt/cgi-io)

Fix landed in openwrt/cgi-io commit 72990b748987 — awaiting tagged release

https://github.com/openwrt/cgi-io/commit/72990b7489872112df31c94032637c907760bae4

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 49× 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. 2026-08-30 03:51 UTCEG score recompute
  2. 2026-08-30 01:22 UTCEPSS rescore
  3. 2026-08-28 21:42 UTCEPSS rescore
  4. 2026-08-27 14:25 UTCEPSS rescore
  5. 2026-08-27 13:25 UTCEG score recompute
  6. 2026-08-26 14:46 UTCEPSS rescore
  7. 2026-08-26 12:00 UTCEG score recompute
  8. 2026-08-25 13:49 UTCEPSS rescore
  9. 2026-08-25 07:50 UTCEG score recompute
  10. 2026-08-23 04:39 UTCEG score recompute
  11. 2026-08-23 00:19 UTCEPSS rescore
  12. 2026-08-22 03:13 UTCEG score recompute
  13. 2026-08-21 23:49 UTCEPSS rescore
  14. 2026-08-21 01:42 UTCEG score recompute
  15. 2026-08-20 22:55 UTCEPSS rescore
  16. 2026-08-20 00:16 UTCEG score recompute
  17. 2026-08-19 17:04 UTCEPSS rescore
  18. 2026-08-18 22:51 UTCEG score recompute
  19. 2026-08-18 13:48 UTCEPSS rescore
  20. 2026-08-17 21:22 UTCEG score recompute
  21. 2026-08-17 13:47 UTCEPSS rescore
  22. 2026-08-16 16:13 UTCEG score recompute
  23. 2026-08-16 14:56 UTCEPSS rescore
  24. 2026-08-15 14:48 UTCEG score recompute
  25. 2026-08-15 01:30 UTCEPSS rescore
Show 54 more
  1. 2026-08-14 13:23 UTCEG score recompute
  2. 2026-08-13 22:00 UTCEPSS rescore
  3. 2026-08-13 11:58 UTCEG score recompute
  4. 2026-08-12 13:51 UTCEPSS rescore
  5. 2026-08-12 10:34 UTCEG score recompute
  6. 2026-08-11 09:08 UTCEG score recompute
  7. 2026-08-11 00:00 UTCEPSS rescore
  8. 2026-08-10 07:43 UTCEG score recompute
  9. 2026-08-09 13:47 UTCEPSS rescore
  10. 2026-08-09 06:19 UTCEG score recompute
  11. 2026-08-08 16:37 UTCEPSS rescore
  12. 2026-08-08 04:54 UTCEG score recompute
  13. 2026-08-07 03:29 UTCEG score recompute
  14. 2026-08-06 13:47 UTCEPSS rescore
  15. 2026-08-06 02:04 UTCEG score recompute
  16. 2026-08-05 19:17 UTCEPSS rescore
  17. 2026-08-05 19:17 UTCEPSS rescore
  18. 2026-08-05 00:40 UTCEG score recompute
  19. 2026-08-04 15:10 UTCEPSS rescore
  20. 2026-08-04 10:39 UTCEPSS rescore
  21. 2026-08-02 21:31 UTCEG score recompute
  22. 2026-08-02 02:27 UTCEPSS rescore
  23. 2026-08-01 20:06 UTCEG score recompute
  24. 2026-08-01 04:16 UTCEPSS rescore
  25. 2026-07-30 17:16 UTCEG score recompute
  26. 2026-07-30 16:28 UTCEPSS rescore
  27. 2026-07-30 01:30 UTCEPSS rescore
  28. 2026-07-30 01:30 UTCEPSS rescore
  29. 2026-07-29 15:51 UTCEG score recompute
  30. 2026-07-28 15:37 UTCEPSS rescore
  31. 2026-07-28 14:26 UTCEG score recompute
  32. 2026-07-27 14:14 UTCEPSS rescore
  33. 2026-07-27 13:02 UTCEG score recompute
  34. 2026-07-26 14:54 UTCEPSS rescore
  35. 2026-07-26 14:54 UTCEPSS rescore
  36. 2026-07-26 11:32 UTCEG score recompute
  37. 2026-07-25 14:18 UTCEPSS rescore
  38. 2026-07-25 14:18 UTCEPSS rescore
  39. 2026-07-24 14:18 UTCEPSS rescore
  40. 2026-07-24 14:18 UTCEPSS rescore
  41. 2026-07-23 14:18 UTCEPSS rescore
  42. 2026-07-23 14:18 UTCEPSS rescore
  43. 2026-07-23 03:22 UTCEG score recompute
  44. 2026-07-22 14:08 UTCEPSS rescore
  45. 2026-07-22 14:08 UTCEPSS rescore
  46. 2026-07-21 15:25 UTCEPSS rescore
  47. 2026-07-21 15:25 UTCEPSS rescore
  48. 2026-07-20 17:08 UTCEPSS rescore
  49. 2026-07-19 14:31 UTCEPSS rescore
  50. 2026-07-19 02:29 UTCEPSS rescore
  51. 2026-07-18 10:04 UTCEPSS rescore
  52. 2026-07-16 17:03 UTCEPSS rescore
  53. 2026-07-15 18:25 UTCEG score recompute
  54. 2026-07-15 18:23 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-62947?
CVE-2026-62947 is a medium vulnerability published on July 15, 2026. OpenWrt is a Linux operating system targeting embedded devices. Prior to 25.12.5, the cgi-download handler in cgi-io authorizes the requested path against the caller's ubus session file ACL before canonicalization, and rpcd session.c uses fnmatch() without FNM_PATHNAME, allowing traversal such as…
When was CVE-2026-62947 disclosed?
CVE-2026-62947 was first published in the National Vulnerability Database on July 15, 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-2026-62947 actively exploited?
CVE-2026-62947 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 57.8% of all scored CVEs.
What is the CVSS score of CVE-2026-62947?
CVE-2026-62947 has a CVSS v3 base score of 4.9 (NVD).
How do I remediate CVE-2026-62947?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62947, 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.

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