CVE-2026-55648

MEDIUMPre-NVD 6.16.1—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 6.1 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 67% 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
6.1EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.1Exploit: None knownExposed: 0

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
6.1
EG Score
6.1(medium)
EG Risk
28(Track)
EG Risk 28/100SSVC: 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
Severity61% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

August 19, 2026

Last Modified

August 21, 2026

Advisory Details (4)

Auto-updated Aug 19, 2026
Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available

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_pr

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 / EcosystemFixed in / PatchReleasedSource
ubuntuwinpr3-utils (3.30.0+dfsg-0ubuntu0.24.04.1) @ noble2026-08-28ubuntu

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.

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 15× in last 7d / 32× 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.

  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 10:56 UTCEG score recompute
  3. 2026-08-28 21:41 UTCEPSS rescore
  4. 2026-08-28 09:02 UTCEG score recompute
  5. 2026-08-28 09:02 UTCVendor advisory
  6. 2026-08-27 14:25 UTCEPSS rescore
  7. 2026-08-27 07:11 UTCEG score recompute
  8. 2026-08-27 07:11 UTCVendor advisory
  9. 2026-08-26 14:46 UTCEPSS rescore
  10. 2026-08-26 05:26 UTCEG score recompute
  11. 2026-08-26 05:26 UTCVendor advisory
  12. 2026-08-25 13:49 UTCEPSS rescore
  13. 2026-08-25 03:42 UTCEG score recompute
  14. 2026-08-25 03:42 UTCVendor advisory
  15. 2026-08-24 01:59 UTCEG score recompute
  16. 2026-08-23 00:19 UTCEPSS rescore
  17. 2026-08-23 00:10 UTCEG score recompute
  18. 2026-08-23 00:10 UTCVendor advisory
  19. 2026-08-21 23:49 UTCEPSS rescore
  20. 2026-08-21 22:26 UTCEG score recompute
  21. 2026-08-21 22:26 UTCVendor advisory
  22. 2026-08-21 22:00 UTCEG score recompute
  23. 2026-08-21 22:00 UTCVendor advisory
  24. 2026-08-21 21:46 UTCEG score recompute
  25. 2026-08-21 21:46 UTCVendor advisory
Show 7 more
  1. 2026-08-20 22:55 UTCEPSS rescore
  2. 2026-08-20 20:02 UTCVendor advisory
  3. 2026-08-19 18:18 UTCEG score recompute
  4. 2026-08-19 18:18 UTCVendor advisory
  5. 2026-08-19 17:53 UTCEG score recompute
  6. 2026-08-19 17:53 UTCVendor advisory
  7. 2026-08-19 17:52 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-55648?
CVE-2026-55648 is a medium vulnerability 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 CVE-2026-55648 disclosed?
CVE-2026-55648 was first published in the National Vulnerability Database on August 19, 2026, with the most recent update on August 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55648 actively exploited?
CVE-2026-55648 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 66.9% of all scored CVEs.
What is the CVSS score of CVE-2026-55648?
CVE-2026-55648 has a CVSS v3 base score of 6.1 (NVD).
How do I remediate CVE-2026-55648?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55648, 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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