CVE-2026-77140

HIGHPre-NVD 8.78.7—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2%, top 85% 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
Trending — 3 sources updated this week
8.7EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.7Exploit: None knownExposed: 0

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

The extension validates the HMAC of a frontend employee edit link only in the action that renders the edit form, not in the action that persists the change. An unauthenticated visitor who knows the UID of a visible employee record can send a direct POST request to the update action and overwrite that record without a valid edit link or any ownership check.

CVSS v3
8.7
EG Score
8.7(medium)
EG Risk
54(Track)
EG Risk 54/100SSVC: 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
Severity87% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

August 25, 2026

Last Modified

August 27, 2026

Advisory Details (1)

Auto-updated Aug 25, 2026
No patch confirmed yet.
generic

TYPO3-EXT-SA-2026-018: Broken Access Control in extension "Telephone Directory" (telephonedirectory) - TYPO3 News

https://typo3.org/security/advisory/typo3-ext-sa-2026-018

Vendor Advisories for CVE-2026-77140(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 27× in last 7d / 109× 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 109 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-77140?
CVE-2026-77140 is a high vulnerability published on August 25, 2026. The extension validates the HMAC of a frontend employee edit link only in the action that renders the edit form, not in the action that persists the change. An unauthenticated visitor who knows the UID of a visible employee record can send a direct POST request to the update action and overwrite…
When was CVE-2026-77140 disclosed?
CVE-2026-77140 was first published in the National Vulnerability Database on August 25, 2026, with the most recent update on August 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-77140 actively exploited?
CVE-2026-77140 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 84.7% of all scored CVEs.
What is the CVSS score of CVE-2026-77140?
CVE-2026-77140 has a CVSS v3 base score of 8.7 (NVD).
How do I remediate CVE-2026-77140?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-77140, 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

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