CVE-2026-57156

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

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

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.7% (51st 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
9.8EG
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: 0.7%CVSS: 9.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0 on 32-bit builds, FreeRDP clients contain an integer overflow in update_read_delta_points in libfreerdp/core/orders.c when multiplying an attacker-controlled point count by sizeof(DELTA_POINT), allowing a malicious RDP peer to allocate an undersized heap buffer and then write beyond it during initialization. This issue is fixed in version 3.28.0.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
44
EG Risk 44/100

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)
Severity98% × 45%
The EG Score, 9.8 of 10.
Exploitation0.7% × 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
0.7%
EPSS %ILE
51st
KEV
Not listed

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.

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

July 10, 2026

Last Modified

July 15, 2026

Advisory Details (4)

Auto-updated Oct 10, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
GitHub advisoryMentions a patch (unverified)

Integer overflow leading to heap buffer overflow in FreeRDP Orders Delta Points parsing · Advisory · FreeRDP/FreeRDP · GitHub

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-v5wf-j8j4-77h7
GitHub release Patch Available

3.28.0

Patch available: FreeRDP/FreeRDP 3.28.0

https://github.com/FreeRDP/FreeRDP/releases/tag/3.28.0
GitHub pull request

[core,orders] fix inverted overflow guard in update_read_delta_points

Fix merged in FreeRDP/FreeRDP PR #12938 on 2026-06-22 — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/pull/12938
GitHub commit

commit 487f35daccb3 (FreeRDP/FreeRDP)

Fix landed in FreeRDP/FreeRDP commit 487f35daccb3 — awaiting tagged release

https://github.com/FreeRDP/FreeRDP/commit/487f35daccb36a6224e530dcd8fa60850825f823

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuwinpr3-utils (3.30.0+dfsg-0ubuntu0.26.04.1) @ resolute2026-10-01ubuntu

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
freerdp22.10.0+dfsg1-1 ... 2.9.0+dfsg1-1~bpo11+1 (32 versions)
  • every version on: no fix on record
—
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 ... 3.32.1+dfsg-1~bpo13+1 (49 versions)
  • every version on: no fix on record
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
freerdp33.15.0+dfsg-2.1 ... 3.27.1+dfsg-1 (35 versions)
  • every version up to 3.28.0+dfsg-1: fixed in 3.28.0+dfsg-1
—

Weakness Classification(2)

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 / 45× 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 344 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 244 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 01:54 UTCEG score recompute
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  3. 2026-10-12 22:10 UTCEG score recompute
  4. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  5. 2026-10-12 15:54 UTCEG score recompute
  6. 2026-10-11 19:37 UTCEG score recompute
  7. 2026-10-11 16:52 UTCEG score recompute
  8. 2026-10-11 14:15 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  17. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  18. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  20. 2026-10-01 14:58 UTCEG score recompute
  21. 2026-10-01 14:58 UTCVendor advisory
  22. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  23. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  24. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  25. 2026-09-28 13:24 UTCVendor advisory
Show 75 more
  1. 2026-09-28 09:46 UTCEG score recompute
  2. 2026-09-28 09:46 UTCVendor advisory
  3. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  4. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  5. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  6. 2026-09-24 11:09 UTCEG score recompute
  7. 2026-09-24 11:09 UTCVendor advisory
  8. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  9. 2026-09-23 09:24 UTCVendor advisory
  10. 2026-09-23 05:44 UTCEG score recompute
  11. 2026-09-23 05:44 UTCVendor advisory
  12. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  13. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  14. 2026-09-18 10:08 UTCVendor advisory
  15. 2026-09-18 05:17 UTCEG score recompute
  16. 2026-09-18 05:17 UTCVendor advisory
  17. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  18. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  19. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  20. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  21. 2026-09-14 11:09 UTCVendor advisory
  22. 2026-09-14 06:59 UTCVendor advisory
  23. 2026-09-14 03:16 UTCVendor advisory
  24. 2026-09-13 23:39 UTCEG score recompute
  25. 2026-09-13 23:39 UTCVendor advisory
  26. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  27. 2026-09-13 16:41 UTCVendor advisory
  28. 2026-09-13 11:53 UTCVendor advisory
  29. 2026-09-13 08:11 UTCVendor advisory
  30. 2026-09-12 17:10 UTCEG score recompute
  31. 2026-09-12 17:10 UTCVendor advisory
  32. 2026-09-12 13:32 UTCVendor advisory
  33. 2026-09-12 02:50 UTCEG score recompute
  34. 2026-09-12 02:50 UTCVendor advisory
  35. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  36. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  37. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  38. 2026-09-08 02:46 UTCEG score recompute
  39. 2026-09-08 02:46 UTCVendor advisory
  40. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  41. 2026-09-06 13:56 UTCEG score recompute
  42. 2026-09-06 13:56 UTCVendor advisory
  43. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  44. 2026-09-06 05:24 UTCVendor advisory
  45. 2026-09-06 01:46 UTCVendor advisory
  46. 2026-09-05 21:41 UTCEG score recompute
  47. 2026-09-05 21:41 UTCVendor advisory
  48. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  49. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  50. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  51. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  52. 2026-08-30 23:51 UTCVendor advisory
  53. 2026-08-30 20:13 UTCEG score recompute
  54. 2026-08-30 20:13 UTCVendor advisory
  55. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  56. 2026-08-30 16:34 UTCVendor advisory
  57. 2026-08-30 11:11 UTCVendor advisory
  58. 2026-08-30 06:15 UTCEG score recompute
  59. 2026-08-30 06:15 UTCVendor advisory
  60. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  61. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  62. 2026-08-28 02:38 UTCVendor advisory
  63. 2026-08-27 21:40 UTCEG score recompute
  64. 2026-08-27 21:40 UTCVendor advisory
  65. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  66. 2026-08-27 00:46 UTCEG score recompute
  67. 2026-08-27 00:46 UTCVendor advisory
  68. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  69. 2026-08-26 12:53 UTCVendor advisory
  70. 2026-08-26 08:16 UTCVendor advisory
  71. 2026-08-26 03:33 UTCVendor advisory
  72. 2026-08-25 14:44 UTCEG score recompute
  73. 2026-08-25 14:44 UTCVendor advisory
  74. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.7% · 50th percentile
  75. 2026-08-25 11:05 UTCVendor advisory

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Frequently asked(5)

What is CVE-2026-57156?
CVE-2026-57156 is a critical-severity vulnerability; its CVE record was published on July 10, 2026. FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.28.0 on 32-bit builds, FreeRDP clients contain an integer overflow in updatereaddeltapoints in libfreerdp/core/orders.c when multiplying an attacker-controlled point count by sizeof(DELTAPOINT), allowing a malicious RDP…
When was the CVE record for CVE-2026-57156 published?
The CVE record for CVE-2026-57156 was published on July 10, 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 July 15, 2026; the record at its source may have been updated since.
Is CVE-2026-57156 actively exploited?
CVE-2026-57156 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (51st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-57156?
CVE-2026-57156 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-57156?
A fix for CVE-2026-57156 is available: update to the fixed version the vendor names in its advisory.

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