CVE-2026-22852

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 71% 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, nvd
Elevated
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a malicious RDP server can trigger a heap-buffer-overflow write in the FreeRDP client when processing Audio Input (AUDIN) format lists. audin_process_formats reuses callback->formats_count across multiple MSG_SNDIN_FORMATS PDUs and writes past the newly allocated formats array, causing memory corruption and a crash. This vulnerability is fixed in 3.20.1.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
60(Track*)
EG Risk 60/100SSVC: 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
Severity98% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Watch closely — could escalate to Attend.
EPSS
29.0%
KEV
Not listed

Published

January 14, 2026

Last Modified

January 20, 2026

Advisory Details (2)

Auto-updated May 30, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github.
github Patch Available🟡 PoC Available

Heap-buffer-overflow in audin_process_formats · Advisory · FreeRDP/FreeRDP · GitHub

https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-9chc-g79v-4qq4
github_release Patch Available

3.20.1

Patch available: FreeRDP/FreeRDP 3.20.1

https://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1

Vendor Advisories for CVE-2026-22852(7)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(15)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuwinpr3-utils (3.16.0+dfsg-2ubuntu0.3) @ questing2026-05-29ubuntu
redhatfreerdp-2:3.10.3-12.el10_2.22026-05-19redhat
redhatfreerdp-0:2.1.1-5.el7_9.72026-04-28redhat
redhatfreerdp-2:2.2.0-12.el8_42026-04-27redhat
redhatfreerdp-2:2.2.0-7.el8_6.52026-04-27redhat
redhatfreerdp-2:2.0.0-46.rc4.el8_2.102026-04-27redhat
redhatfreerdp-2:2.2.0-12.el8_8.52026-04-23redhat
redhatfreerdp-2:2.4.1-6.el9_2.62026-04-22redhat
redhatfreerdp-2:2.4.1-3.el9_0.42026-04-22redhat
redhatfreerdp-2:2.11.2-1.el9_4.52026-04-08redhat
redhatfreerdp-2:2.11.7-6.el8_102026-04-07redhat
redhatfreerdp-2:3.10.3-5.el10_1.52026-04-07redhat
redhatfreerdp-2:2.11.7-1.el9_6.72026-04-07redhat
redhatfreerdp-2:3.10.3-3.el10_0.52026-04-07redhat
redhatfreerdp-2:2.11.7-1.el9_7.52026-04-01redhat

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.

Additional Vendor Advisories

(8)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 13× in last 7d / 50× 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. 2026-07-23 03:06 UTCEG score recompute
  2. 2026-07-22 14:08 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
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  1. 2026-07-08 15:15 UTCEPSS rescore
  2. 2026-07-07 13:46 UTCEPSS rescore
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 05:32 UTCOSV refresh
  6. 2026-07-06 02:23 UTCEPSS rescore
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  36. 2026-06-17 17:05 UTCOSV refresh
  37. 2026-06-16 17:52 UTCEPSS rescore
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  39. 2026-06-14 23:18 UTCEPSS rescore
  40. 2026-06-13 23:00 UTCEPSS rescore
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  44. 2026-06-10 22:18 UTCEPSS rescore
  45. 2026-06-10 13:22 UTCEPSS rescore
  46. 2026-06-08 14:17 UTCEPSS rescore
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  50. 2026-06-06 13:47 UTCEPSS rescore
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  69. 2026-05-29 15:55 UTCEG score recompute
  70. 2026-05-29 15:55 UTCVendor advisory
  71. 2026-05-29 13:44 UTCEPSS rescore
  72. 2026-05-29 13:44 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-22852?
CVE-2026-22852 is a critical vulnerability published on January 14, 2026. FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.20.1, a malicious RDP server can trigger a heap-buffer-overflow write in the FreeRDP client when processing Audio Input (AUDIN) format lists. audinprocessformats reuses callback->formatscount across multiple…
When was CVE-2026-22852 disclosed?
CVE-2026-22852 was first published in the National Vulnerability Database on January 14, 2026, with the most recent update on January 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-22852 actively exploited?
CVE-2026-22852 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 29.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-22852?
CVE-2026-22852 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-22852?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-22852, 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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