CVE-2025-9185

HIGHNVD 8.18.1
EchelonGraph scoreMEDIUM confidence

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

Score 8.1 from GitHub Security Advisory (severity: HIGH) published 2025-08-19. NVD baseline CVSS 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 4 sources updated this week

Also known asEUVD-2025-25243 (ENISA EUVD) · GHSA-2hgr-r3c9-m9jw (GitHub Security Advisories)Source: ENISA EUVD

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: 0.5%CVSS: 8.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Memory safety bugs present in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.

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 impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity81% × 45%
Impact severity (EG Severity): CVSS 8.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.5% × 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 low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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
0.5%
EPSS %ILE
43rd
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (8.1): severity, escalated by confirmed exploitation. This CVE's 8.1 is its impact severity (EG Severity), not escalated.

EG Severity
8.1 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-31). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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

August 19, 2025

Last Modified

October 5, 2026

Advisory Details (10)

Auto-updated Sep 9, 2026
Patch available.
Web pageMentions a patch (unverified)

[SECURITY] [DLA 4279-1] thunderbird security update

https://lists.debian.org/debian-lts-announce/2025/08/msg00018.html
Web pageMentions a patch (unverified)

[SECURITY] [DLA 4277-1] firefox-esr security update

https://lists.debian.org/debian-lts-announce/2025/08/msg00016.html
Web page

Security Vulnerabilities fixed in Thunderbird 140.2 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2025-72/
Web page

Security Vulnerabilities fixed in Thunderbird 128.14 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2025-71/
Web page

Security Vulnerabilities fixed in Thunderbird 142 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2025-70/
Web page

Security Vulnerabilities fixed in Firefox ESR 140.2 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2025-67/
Web page

Security Vulnerabilities fixed in Firefox ESR 128.14 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2025-66/
Web page

Security Vulnerabilities fixed in Firefox ESR 115.27 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2025-65/
Web page

Security Vulnerabilities fixed in Firefox 142 — Mozilla

https://www.mozilla.org/security/advisories/mfsa2025-64/

Patch Availability(22)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuxul-ext-lightning (1:140.7.1+build1-0ubuntu0.22.04.1) @ jammy2026-11-01ubuntu
redhatthunderbird-0:128.14.0-3.el8_62025-09-09redhat
redhatthunderbird-0:128.14.0-3.el9_22025-09-08redhat
redhatthunderbird-0:128.14.0-3.el9_42025-09-08redhat
redhatthunderbird-0:128.14.0-3.el8_82025-09-08redhat
redhatfirefox-0:128.14.0-2.el7_92025-09-08redhat
redhatthunderbird-0:128.14.0-3.el8_22025-09-08redhat
redhatthunderbird-0:128.14.0-3.el9_02025-09-08redhat
redhatfirefox-0:128.14.0-2.el8_22025-09-08redhat
redhatthunderbird-0:128.14.0-3.el8_42025-09-08redhat
redhatfirefox-0:128.14.0-2.el9_02025-09-08redhat
redhatfirefox-0:128.14.0-2.el8_62025-09-08redhat
redhatfirefox-0:128.14.0-2.el8_42025-09-08redhat
redhatfirefox-0:128.14.0-2.el9_22025-09-08redhat
redhatfirefox-0:128.14.0-2.el9_42025-09-08redhat
redhatfirefox-0:128.14.0-2.el8_82025-09-08redhat
redhatthunderbird-0:128.14.0-3.el10_02025-08-28redhat
redhatthunderbird-0:128.14.0-3.el8_102025-08-27redhat
redhatthunderbird-0:128.14.0-3.el9_62025-08-26redhat
redhatfirefox-0:128.14.0-2.el9_62025-08-25redhat
redhatfirefox-0:128.14.0-2.el10_02025-08-25redhat
redhatfirefox-0:128.14.0-2.el8_102025-08-25redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(8 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr102.1.0esr-1 ... 91.9.1esr-1~deb9u1 (220 versions)
  • every version up to 128.14.0esr-1~deb11u1: fixed in 128.14.0esr-1~deb11u1
—
thunderbird1:102.0.1-1 ... 1:91.9.0-1~deb9u1 (262 versions)
  • every version up to 1:128.14.0esr-1~deb11u1: fixed in 1:128.14.0esr-1~deb11u1
—
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr102.11.0esr-1 ... 128.9.0esr-2 (127 versions)
  • every version up to 128.14.0esr-1~deb12u1: fixed in 128.14.0esr-1~deb12u1
—
thunderbird1:102.11.0-1 ... 1:128.9.0esr-1~deb12u1 (147 versions)
  • every version up to 1:128.14.0esr-1~deb12u1: fixed in 1:128.14.0esr-1~deb12u1
—
Debian:13(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr128.13.0esr-1, 128.14.0esr-1~deb11u1, 128.14.0esr-1~deb12u1
  • every version up to 128.14.0esr-1~deb13u1: fixed in 128.14.0esr-1~deb13u1
—
thunderbird1:128.13.0esr-1, 1:128.14.0esr-1~deb11u1, 1:128.14.0esr-1~deb12u1
  • every version up to 1:128.14.0esr-1~deb13u1: fixed in 1:128.14.0esr-1~deb13u1
—
Debian:14(2)
PackageVulnerable rangeFix by version rangeDependents
firefox-esr128.13.0esr-1, 128.14.0esr-1~deb11u1, 128.14.0esr-1~deb12u1, 128.14.0esr-1~deb13u1
  • every version up to 128.14.0esr-1: fixed in 128.14.0esr-1
—
thunderbird1:128.13.0esr-1, 1:128.14.0esr-1~deb11u1, 1:128.14.0esr-1~deb12u1, 1:128.14.0esr-1~deb13u1
  • every version up to 1:128.14.0esr-1: fixed in 1:128.14.0esr-1
—

Weakness Classification(1)

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

All Vendor Advisories

(22)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 48× 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 221 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 121 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  2. 2026-11-01 10:46 UTCEG score recompute
  3. 2026-11-01 10:46 UTCVendor advisory
  4. 2026-11-01 10:46 UTCGHSA enrichmentGHSA-2hgr-r3c9-m9jw · GitHub severity HIGH · GitHub CVSS 8.1
  5. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  6. 2026-10-30 16:33 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  7. 2026-10-29 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  8. 2026-10-28 16:31 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  9. 2026-10-27 16:31 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  10. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  11. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.5% · 43rd percentile
  12. 2026-10-25 16:00 UTCEG score recompute
  13. 2026-10-25 03:56 UTCEG score recompute
  14. 2026-10-25 03:56 UTCVendor advisory
  15. 2026-10-25 03:56 UTCGHSA enrichmentGHSA-2hgr-r3c9-m9jw · GitHub severity HIGH · GitHub CVSS 8.1
  16. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  17. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  18. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  19. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  20. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  21. 2026-10-19 16:31 UTCEPSS rescoreEPSS 0.5% · 42nd percentile
  22. 2026-10-18 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  23. 2026-10-18 05:13 UTCEG score recompute
  24. 2026-10-17 21:06 UTCEG score recompute
  25. 2026-10-17 21:06 UTCVendor advisory
Show 75 more
  1. 2026-10-17 21:06 UTCGHSA enrichmentGHSA-2hgr-r3c9-m9jw · GitHub severity HIGH · GitHub CVSS 8.1
  2. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-10-16 16:40 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  4. 2026-10-15 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  5. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  6. 2026-10-13 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  7. 2026-10-12 16:43 UTCEG score recompute
  8. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  9. 2026-10-11 20:18 UTCEG score recompute
  10. 2026-10-11 18:30 UTCEG score recompute
  11. 2026-10-11 15:04 UTCEG score recompute
  12. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  13. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  14. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  15. 2026-10-08 17:11 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  16. 2026-10-07 23:47 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  17. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  18. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  19. 2026-10-05 15:40 UTCEG score recompute
  20. 2026-10-05 15:40 UTCVendor advisory
  21. 2026-10-05 15:40 UTCGHSA enrichmentGHSA-2hgr-r3c9-m9jw · GitHub severity HIGH · GitHub CVSS 8.1
  22. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  23. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  24. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  25. 2026-09-30 18:44 UTCEG score recompute
  26. 2026-09-30 18:44 UTCVendor advisory
  27. 2026-09-30 18:44 UTCGHSA enrichmentGHSA-2hgr-r3c9-m9jw · GitHub severity HIGH · GitHub CVSS 8.1
  28. 2026-09-30 15:02 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  29. 2026-09-29 15:20 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  30. 2026-09-28 13:50 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  31. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  32. 2026-09-23 13:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  33. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  34. 2026-09-18 19:27 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  35. 2026-09-16 19:50 UTCOSV refresh
  36. 2026-09-16 05:14 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  37. 2026-09-13 16:46 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  38. 2026-09-12 15:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  39. 2026-09-11 14:52 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  40. 2026-09-11 09:36 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  41. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  42. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  43. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  44. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  45. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  46. 2026-09-02 14:11 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  47. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  48. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  49. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  50. 2026-08-30 01:21 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  51. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  52. 2026-08-28 19:53 UTCOSV refresh
  53. 2026-08-27 14:24 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  54. 2026-08-25 13:48 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  55. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  56. 2026-08-21 23:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  57. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  58. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  59. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  60. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  61. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  62. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  63. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  64. 2026-08-12 13:50 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  65. 2026-08-12 07:47 UTCOSV refresh
  66. 2026-08-11 13:42 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  67. 2026-08-10 23:59 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  68. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  69. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  70. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  71. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  72. 2026-08-04 15:09 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  73. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  74. 2026-08-03 10:35 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  75. 2026-08-02 02:26 UTCEPSS rescoreEPSS 0.5% · 38th percentile

Frequently asked(5)

What is CVE-2025-9185?
CVE-2025-9185 is a high-severity vulnerability; its CVE record was published on August 19, 2025. Memory safety bugs present in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been…
When was the CVE record for CVE-2025-9185 published?
The CVE record for CVE-2025-9185 was published on August 19, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 5, 2026; the record at its source may have been updated since.
Is CVE-2025-9185 actively exploited?
CVE-2025-9185 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (43rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-9185?
CVE-2025-9185 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2025-9185?
A fix for CVE-2025-9185 is available: update to the fixed version the vendor names in its advisory.

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