CVE-2021-26085

CRITICALNVD 5.39.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2022-03-28), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 5.3 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 3 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 100%CVSS: 5.3Exploit: cisa kev · ssvc active · kev ransomware · epss top5pct · epss high · public exploitExposed: 0

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

Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read vulnerability in the /s/ endpoint. The affected versions are before version 7.4.10, and from version 7.5.0 before 7.12.3.

CVSS v3
5.3
EG Score
9.0(high)
EG Risk
96(Attend)
EG Risk 96/100SSVC: Attend

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
Severity90% × 45%
Exploitation100% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
100%
EPSS %ILE
100%
KEV
⚠ Exploited

Published

August 3, 2021

Last Modified

October 24, 2025

Advisory Details (2)

Auto-updated Jun 13, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-26085
generic

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https://jira.atlassian.com/browse/CONFSERVER-67893

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 44× in last 7d / 190× 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.

Showing the most recent 100 of 695 total refreshes for this CVE.

  1. 2026-09-19 07:21 UTCGHSA enrichment
  2. 2026-09-19 03:07 UTCGHSA enrichment
  3. 2026-09-18 22:52 UTCGHSA enrichment
  4. 2026-09-18 19:20 UTCCISA KEV update
  5. 2026-09-18 18:38 UTCGHSA enrichment
  6. 2026-09-18 14:24 UTCGHSA enrichment
  7. 2026-09-18 14:15 UTCCISA KEV update
  8. 2026-09-18 10:10 UTCGHSA enrichment
  9. 2026-09-18 05:55 UTCGHSA enrichment
  10. 2026-09-18 01:40 UTCGHSA enrichment
  11. 2026-09-17 21:25 UTCGHSA enrichment
  12. 2026-09-17 17:11 UTCGHSA enrichment
  13. 2026-09-17 12:13 UTCGHSA enrichment
  14. 2026-09-17 07:59 UTCGHSA enrichment
  15. 2026-09-17 03:45 UTCGHSA enrichment
  16. 2026-09-16 23:31 UTCGHSA enrichment
  17. 2026-09-16 19:16 UTCGHSA enrichment
  18. 2026-09-16 15:02 UTCGHSA enrichment
  19. 2026-09-16 14:10 UTCCISA KEV update
  20. 2026-09-16 10:47 UTCGHSA enrichment
  21. 2026-09-16 06:33 UTCEG score recompute
  22. 2026-09-16 06:33 UTCGHSA enrichment
  23. 2026-09-16 02:19 UTCGHSA enrichment
  24. 2026-09-15 22:05 UTCGHSA enrichment
  25. 2026-09-15 17:49 UTCGHSA enrichment
Show 75 more
  1. 2026-09-15 13:35 UTCGHSA enrichment
  2. 2026-09-15 09:21 UTCGHSA enrichment
  3. 2026-09-15 05:06 UTCGHSA enrichment
  4. 2026-09-15 00:50 UTCGHSA enrichment
  5. 2026-09-14 20:36 UTCGHSA enrichment
  6. 2026-09-14 19:24 UTCCISA KEV update
  7. 2026-09-14 16:22 UTCGHSA enrichment
  8. 2026-09-14 12:08 UTCGHSA enrichment
  9. 2026-09-14 07:53 UTCGHSA enrichment
  10. 2026-09-14 03:39 UTCGHSA enrichment
  11. 2026-09-13 23:25 UTCGHSA enrichment
  12. 2026-09-13 19:11 UTCGHSA enrichment
  13. 2026-09-13 14:57 UTCGHSA enrichment
  14. 2026-09-13 10:43 UTCGHSA enrichment
  15. 2026-09-13 06:28 UTCGHSA enrichment
  16. 2026-09-13 02:13 UTCGHSA enrichment
  17. 2026-09-12 22:00 UTCGHSA enrichment
  18. 2026-09-12 17:45 UTCGHSA enrichment
  19. 2026-09-12 13:31 UTCGHSA enrichment
  20. 2026-09-12 09:17 UTCGHSA enrichment
  21. 2026-09-12 05:03 UTCGHSA enrichment
  22. 2026-09-12 00:49 UTCGHSA enrichment
  23. 2026-09-11 20:34 UTCGHSA enrichment
  24. 2026-09-11 18:49 UTCCISA KEV update
  25. 2026-09-11 16:20 UTCGHSA enrichment
  26. 2026-09-11 12:06 UTCGHSA enrichment
  27. 2026-09-11 07:52 UTCGHSA enrichment
  28. 2026-09-11 03:38 UTCGHSA enrichment
  29. 2026-09-10 23:24 UTCGHSA enrichment
  30. 2026-09-10 19:28 UTCCISA KEV update
  31. 2026-09-10 19:10 UTCGHSA enrichment
  32. 2026-09-10 14:55 UTCGHSA enrichment
  33. 2026-09-10 10:39 UTCGHSA enrichment
  34. 2026-09-10 06:24 UTCGHSA enrichment
  35. 2026-09-10 02:10 UTCGHSA enrichment
  36. 2026-09-09 21:56 UTCGHSA enrichment
  37. 2026-09-09 19:08 UTCCISA KEV update
  38. 2026-09-09 17:40 UTCGHSA enrichment
  39. 2026-09-09 13:25 UTCGHSA enrichment
  40. 2026-09-09 09:09 UTCGHSA enrichment
  41. 2026-09-09 04:54 UTCGHSA enrichment
  42. 2026-09-09 00:39 UTCGHSA enrichment
  43. 2026-09-08 20:25 UTCGHSA enrichment
  44. 2026-09-08 18:54 UTCCISA KEV update
  45. 2026-09-08 16:10 UTCGHSA enrichment
  46. 2026-09-08 11:54 UTCGHSA enrichment
  47. 2026-09-08 07:39 UTCGHSA enrichment
  48. 2026-09-08 03:23 UTCGHSA enrichment
  49. 2026-09-07 23:09 UTCGHSA enrichment
  50. 2026-09-07 18:54 UTCGHSA enrichment
  51. 2026-09-07 14:39 UTCGHSA enrichment
  52. 2026-09-07 10:23 UTCGHSA enrichment
  53. 2026-09-07 06:08 UTCGHSA enrichment
  54. 2026-09-07 01:51 UTCGHSA enrichment
  55. 2026-09-06 21:34 UTCGHSA enrichment
  56. 2026-09-06 17:19 UTCGHSA enrichment
  57. 2026-09-06 13:04 UTCGHSA enrichment
  58. 2026-09-06 08:50 UTCGHSA enrichment
  59. 2026-09-06 04:36 UTCGHSA enrichment
  60. 2026-09-06 00:22 UTCGHSA enrichment
  61. 2026-09-05 20:06 UTCGHSA enrichment
  62. 2026-09-05 15:52 UTCGHSA enrichment
  63. 2026-09-05 11:37 UTCGHSA enrichment
  64. 2026-09-05 07:23 UTCGHSA enrichment
  65. 2026-09-05 03:08 UTCGHSA enrichment
  66. 2026-09-04 22:51 UTCGHSA enrichment
  67. 2026-09-04 18:36 UTCGHSA enrichment
  68. 2026-09-04 17:38 UTCCISA KEV update
  69. 2026-09-04 14:19 UTCGHSA enrichment
  70. 2026-09-04 10:04 UTCGHSA enrichment
  71. 2026-09-04 05:48 UTCGHSA enrichment
  72. 2026-09-04 01:33 UTCGHSA enrichment
  73. 2026-09-03 21:18 UTCGHSA enrichment
  74. 2026-09-03 17:04 UTCGHSA enrichment
  75. 2026-09-03 12:50 UTCGHSA enrichment

Publicly available exploits

(3 references)

Working exploit code is in the public domain (1 GitHub PoC) (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-50377
    First seen Oct 5, 2021

    Atlassian Confluence 7.12.2 - Pre-Authorization Arbitrary File Read

    Open source ↗
  • GitHub PoCColdFusionX/CVE-2021-26085
    First seen Oct 5, 2021

    Atlassian Confluence Server 7.5.1 Pre-Authorization Arbitrary File Read vulnerability (CVE-2021-26085)

    Open source ↗
  • Nucleihttp/cves/2021/CVE-2021-26085.yaml
    First seen Jan 1, 2021

    Atlassian Confluence Server - Local File Inclusion

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2021-26085?
CVE-2021-26085 is a critical vulnerability published on August 3, 2021. Affected versions of Atlassian Confluence Server allow remote attackers to view restricted resources via a Pre-Authorization Arbitrary File Read vulnerability in the /s/ endpoint. The affected versions are before version 7.4.10, and from version 7.5.0 before 7.12.3.
When was CVE-2021-26085 disclosed?
CVE-2021-26085 was first published in the National Vulnerability Database on August 3, 2021, with the most recent update on October 24, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2021-26085 actively exploited?
Yes. CISA added CVE-2021-26085 to the Known Exploited Vulnerabilities catalog on March 28, 2022, affecting Atlassian Confluence Server. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2021-26085?
CVE-2021-26085 has a CVSS v3 base score of 5.3 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2021-26085?
CVE-2021-26085 affects Atlassian Confluence Server. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2021-26085?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2021-26085, 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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