CVE-2026-55648

HIGHNVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit probability: 0.4% (35th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Trending — 3 sources updated this week
7.5EG
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: 0.4%CVSS: 7.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, freerdp_image_copy_from_icon_data in libfreerdp/codec/color.c calculates nWidth multiplied by nHeight multiplied by FreeRDPGetBytesPerPixel(format) in 32-bit arithmetic. A malicious RDP server can send a RAIL TS_ICON_INFO update with dimensions such as 32768 by 32768 and 32 bits per pixel so the required-size calculation wraps, bypassing the cbBitsColor source bounds check before freerdp_image_copy_no_overlap reads attacker-controlled icon data. This affects RemoteApp clients using the vulnerable library path, while xfreerdp has a caller-side mitigation. This issue is fixed in version 3.27.0.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
34
EG Risk 34/100

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)
Severity75% × 45%
The EG Score, 7.5 of 10.
Exploitation0.4% × 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
0.4%
EPSS %ILE
35th
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

August 19, 2026

Last Modified

September 24, 2026

Advisory Details (4)

Auto-updated Aug 19, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
GitHub advisoryMentions a patch (unverified)

Integer Overflow in `freerdp_image_copy_from_icon_data` Bypasses Bounds Check · Advisory · FreeRDP/FreeRDP · GitHub

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5c5v-f78v-h2f6
GitHub release Patch Available

3.27.0

Patch available: FreeRDP/FreeRDP 3.27.0

https://github.com/FreeRDP/FreeRDP/releases/tag/3.27.0
GitHub pull request

Ntlm hostname

Fix merged in FreeRDP/FreeRDP PR #12877 on 2026-06-13 — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/pull/12877
GitHub commit

commit e4ae473da292 (FreeRDP/FreeRDP)

Fix landed in FreeRDP/FreeRDP commit e4ae473da292 — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/commit/e4ae473da2926724d9b6329778797a3bdea79eb3

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuwinpr3-utils (3.30.0+dfsg-0ubuntu0.26.04.1) @ resolute2026-10-08ubuntu

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
freerdp22.10.0+dfsg1-1 ... 2.11.7+dfsg1-6~deb12u1 (13 versions)
  • every version on: no fix on record
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
freerdp33.15.0+dfsg-2.1 ... 3.32.0+dfsg-1 (47 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
freerdp33.15.0+dfsg-2.1 ... 3.26.0+dfsg-1~bpo13+1 (33 versions)
  • every version up to 3.27.0+dfsg-1: fixed in 3.27.0+dfsg-1
—

Weakness Classification(1)

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

All Vendor Advisories

(1)

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 13× in last 7d / 82× 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 149 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 49 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  2. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  3. 2026-10-12 15:55 UTCEG score recompute
  4. 2026-10-11 19:38 UTCEG score recompute
  5. 2026-10-11 16:54 UTCEG score recompute
  6. 2026-10-11 14:16 UTCEG score recompute
  7. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  8. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  10. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  11. 2026-10-08 07:44 UTCEG score recompute
  12. 2026-10-08 07:44 UTCVendor advisory
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  14. 2026-10-07 10:26 UTCVendor advisory
  15. 2026-10-06 21:21 UTCEG score recompute
  16. 2026-10-06 21:21 UTCVendor advisory
  17. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  18. 2026-10-06 07:57 UTCEG score recompute
  19. 2026-10-06 07:57 UTCVendor advisory
  20. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  21. 2026-10-05 10:12 UTCEG score recompute
  22. 2026-10-05 10:12 UTCVendor advisory
  23. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  24. 2026-10-04 21:24 UTCVendor advisory
  25. 2026-10-04 05:44 UTCVendor advisory
Show 75 more
  1. 2026-10-03 16:58 UTCEG score recompute
  2. 2026-10-03 16:58 UTCVendor advisory
  3. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  4. 2026-10-03 04:12 UTCEG score recompute
  5. 2026-10-03 04:12 UTCVendor advisory
  6. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  7. 2026-10-02 14:53 UTCVendor advisory
  8. 2026-10-02 01:21 UTCEG score recompute
  9. 2026-10-02 01:21 UTCVendor advisory
  10. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  11. 2026-10-01 10:22 UTCVendor advisory
  12. 2026-09-30 21:36 UTCEG score recompute
  13. 2026-09-30 21:36 UTCVendor advisory
  14. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  15. 2026-09-30 08:43 UTCEG score recompute
  16. 2026-09-30 08:43 UTCVendor advisory
  17. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  18. 2026-09-28 21:42 UTCEG score recompute
  19. 2026-09-28 21:42 UTCVendor advisory
  20. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  21. 2026-09-28 08:44 UTCVendor advisory
  22. 2026-09-27 19:58 UTCEG score recompute
  23. 2026-09-27 19:58 UTCVendor advisory
  24. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  25. 2026-09-27 06:55 UTCEG score recompute
  26. 2026-09-27 06:55 UTCVendor advisory
  27. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  28. 2026-09-25 04:17 UTCVendor advisory
  29. 2026-09-24 15:30 UTCEG score recompute▲ 1.40
  30. 2026-09-24 15:30 UTCVendor advisory
  31. 2026-09-24 15:28 UTCNVD updateCVSS v3 → 7.5 · severity → HIGH
  32. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.6% · 43rd percentile
  33. 2026-09-23 22:10 UTCEG score recompute
  34. 2026-09-23 22:10 UTCVendor advisory
  35. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  36. 2026-09-22 20:26 UTCEG score recompute
  37. 2026-09-22 20:26 UTCVendor advisory
  38. 2026-09-21 18:42 UTCEG score recompute
  39. 2026-09-21 18:42 UTCVendor advisory
  40. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  41. 2026-09-20 16:58 UTCEG score recompute
  42. 2026-09-20 16:58 UTCVendor advisory
  43. 2026-09-19 15:10 UTCEG score recompute
  44. 2026-09-19 15:10 UTCVendor advisory
  45. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  46. 2026-09-18 13:25 UTCEG score recompute
  47. 2026-09-18 13:25 UTCVendor advisory
  48. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  49. 2026-09-17 11:39 UTCEG score recompute
  50. 2026-09-17 11:39 UTCVendor advisory
  51. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  52. 2026-09-16 09:50 UTCEG score recompute
  53. 2026-09-16 09:50 UTCVendor advisory
  54. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  55. 2026-09-15 07:21 UTCEG score recompute
  56. 2026-09-15 07:21 UTCVendor advisory
  57. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  58. 2026-09-14 05:37 UTCEG score recompute
  59. 2026-09-14 05:37 UTCVendor advisory
  60. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  61. 2026-09-13 03:53 UTCEG score recompute
  62. 2026-09-13 03:53 UTCVendor advisory
  63. 2026-09-12 02:09 UTCEG score recompute
  64. 2026-09-12 02:09 UTCVendor advisory
  65. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  66. 2026-09-11 00:24 UTCEG score recompute
  67. 2026-09-11 00:24 UTCVendor advisory
  68. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  69. 2026-09-09 22:37 UTCVendor advisory
  70. 2026-09-09 08:02 UTCEG score recompute
  71. 2026-09-09 08:02 UTCVendor advisory
  72. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  73. 2026-09-08 06:18 UTCEG score recompute
  74. 2026-09-08 06:18 UTCVendor advisory
  75. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 33rd percentile

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Frequently asked(5)

What is CVE-2026-55648?
CVE-2026-55648 is a high-severity vulnerability; its CVE record was published on August 19, 2026. FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.27.0, freerdpimagecopyfromicondata in libfreerdp/codec/color.c calculates nWidth multiplied by nHeight multiplied by FreeRDPGetBytesPerPixel(format) in 32-bit arithmetic. A malicious RDP server can send a RAIL TSICONINFO…
When was the CVE record for CVE-2026-55648 published?
The CVE record for CVE-2026-55648 was published on August 19, 2026. 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 September 24, 2026; the record at its source may have been updated since.
Is CVE-2026-55648 actively exploited?
CVE-2026-55648 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (35th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55648?
CVE-2026-55648 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-55648?
A fix for CVE-2026-55648 is available: update to the fixed version the vendor names in its advisory.

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