CVE-2026-42835

HIGHPre-NVD 8.18.1
EchelonGraph scoreMEDIUM confidence

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

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. The CNA's CVSS baseline 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
8.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1.2%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Improper neutralization of special elements in output used by a downstream component ('injection') in Microsoft Teams for Android allows an authorized attacker to disclose information over a network.

CVSS v3
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100

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 (value × EchelonGraph’s weight)
Severity81% × 45%
The EG Score, 8.1 of 10.
Exploitation1.2% × 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
1.2%
EPSS %ILE
68th
KEV
Not listed

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.

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

June 9, 2026

Last Modified

September 24, 2026

Advisory Details (1)

Auto-updated Jun 9, 2026
Patch available. Sources: microsoft.
MicrosoftMentions a patch (unverified)

Security Update Guide - Microsoft Security Response Center

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42835

Vendor Advisories for CVE-2026-42835(2)

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 11× in last 7d / 29× 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 it from the CNA feed. 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). Most recent first.

Showing the most recent 100 of 372 refreshes 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 272 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-15 16:32 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  2. 2026-10-14 16:33 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  3. 2026-10-13 16:34 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  4. 2026-10-12 16:34 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  5. 2026-10-12 16:07 UTCEG score recompute
  6. 2026-10-11 19:48 UTCEG score recompute
  7. 2026-10-11 17:03 UTCEG score recompute
  8. 2026-10-11 14:29 UTCEG score recompute
  9. 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  12. 2026-10-08 17:12 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  14. 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  17. 2026-10-03 14:25 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  19. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  20. 2026-09-27 13:48 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  21. 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.2% · 68th percentile
  22. 2026-09-24 14:08 UTCEG score recompute
  23. 2026-09-24 14:08 UTCVendor advisory
  24. 2026-09-24 14:08 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  25. 2026-09-23 17:53 UTCEPSS rescoreEPSS 1.3% · 68th percentile
Show 75 more
  1. 2026-09-20 20:15 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  2. 2026-09-18 19:28 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  3. 2026-09-17 19:31 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  4. 2026-09-16 14:08 UTCEPSS rescoreEPSS 1.3% · 68th percentile
  5. 2026-09-16 05:15 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  6. 2026-09-14 04:29 UTCEG score recompute
  7. 2026-09-14 04:29 UTCVendor advisory
  8. 2026-09-14 04:29 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  9. 2026-09-12 15:01 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  10. 2026-09-11 14:53 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  11. 2026-09-11 09:37 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  12. 2026-09-10 09:34 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  13. 2026-09-08 22:00 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  14. 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  15. 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  16. 2026-09-04 05:06 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  17. 2026-09-02 14:12 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  18. 2026-09-01 13:54 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  19. 2026-08-31 00:48 UTCEG score recompute
  20. 2026-08-31 00:48 UTCVendor advisory
  21. 2026-08-31 00:48 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  22. 2026-08-30 19:17 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  23. 2026-08-30 01:22 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  24. 2026-08-28 21:41 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  25. 2026-08-27 14:25 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  26. 2026-08-26 14:46 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  27. 2026-08-25 23:05 UTCEG score recompute
  28. 2026-08-25 23:05 UTCVendor advisory
  29. 2026-08-25 23:05 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  30. 2026-08-25 13:49 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  31. 2026-08-25 03:45 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  32. 2026-08-24 15:37 UTCEG score recompute
  33. 2026-08-24 15:37 UTCVendor advisory
  34. 2026-08-24 15:37 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  35. 2026-08-23 23:33 UTCVendor advisory
  36. 2026-08-23 23:33 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  37. 2026-08-23 11:10 UTCEG score recompute
  38. 2026-08-23 11:10 UTCVendor advisory
  39. 2026-08-23 11:10 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  40. 2026-08-23 00:19 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  41. 2026-08-21 23:49 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  42. 2026-08-21 22:46 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  43. 2026-08-21 10:07 UTCEG score recompute
  44. 2026-08-21 10:07 UTCVendor advisory
  45. 2026-08-21 10:07 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  46. 2026-08-20 22:55 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  47. 2026-08-20 21:11 UTCVendor advisory
  48. 2026-08-20 21:11 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  49. 2026-08-20 09:00 UTCEG score recompute
  50. 2026-08-20 09:00 UTCVendor advisory
  51. 2026-08-20 09:00 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  52. 2026-08-19 17:03 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  53. 2026-08-18 13:48 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  54. 2026-08-17 13:47 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  55. 2026-08-17 12:38 UTCVendor advisory
  56. 2026-08-17 12:38 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  57. 2026-08-17 00:30 UTCEG score recompute
  58. 2026-08-17 00:30 UTCVendor advisory
  59. 2026-08-17 00:30 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  60. 2026-08-16 14:56 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  61. 2026-08-16 06:18 UTCEG score recompute
  62. 2026-08-16 06:18 UTCVendor advisory
  63. 2026-08-16 06:18 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  64. 2026-08-16 02:14 UTCEPSS rescoreEPSS 1.3% · 67th percentile
  65. 2026-08-15 18:11 UTCVendor advisory
  66. 2026-08-15 18:11 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  67. 2026-08-15 05:03 UTCEG score recompute
  68. 2026-08-15 05:03 UTCVendor advisory
  69. 2026-08-15 05:03 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  70. 2026-08-15 01:30 UTCEPSS rescoreEPSS 1.3% · 66th percentile
  71. 2026-08-14 16:33 UTCVendor advisory
  72. 2026-08-14 16:33 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1
  73. 2026-08-14 09:08 UTCEG score recompute
  74. 2026-08-14 09:08 UTCVendor advisory
  75. 2026-08-14 09:08 UTCGHSA enrichmentGHSA-mqcp-h3mm-5h8v · GitHub severity HIGH · GitHub CVSS 8.1

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-42835?
CVE-2026-42835 is a high-severity vulnerability; its CVE record was published on June 9, 2026. Improper neutralization of special elements in output used by a downstream component ('injection') in Microsoft Teams for Android allows an authorized attacker to disclose information over a network.
When was CVE-2026-42835 made public?
CVE-2026-42835 was made public on June 9, 2026: that is the date its CVE record's CNA, Microsoft Corporation, gives for when the vulnerability was made public. The CVE record itself was published on June 9, 2026. EchelonGraph's copy of the record carries a last-modified date of September 24, 2026; the record at its source may have been updated since.
Is CVE-2026-42835 actively exploited?
CVE-2026-42835 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.2% probability of exploitation in the next 30 days (68th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-42835?
CVE-2026-42835 has a CVSS base score of 8.1 (the CNA's own assessment, by microsoft; NVD's own analysis pending).
How do I remediate CVE-2026-42835?
A fix for CVE-2026-42835 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-42835 are linked in the Vendor Advisories panel on this page.

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