CVE-2026-33983

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreLOW confidence

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). 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: secondary
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 6.5Exploit: NoneExposed: 0

A fix is available — apply it.

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, progressive_decompress_tile_upgrade() detects a mismatch via progressive_rfx_quant_cmp_equal() but only emits WLog_WARN, execution continues. The wrapped value (247) is used as a shift exponent, causing undefined behavior and an approximately 80 billion iteration loop (CPU DoS). This issue has been patched in version 3.24.2.

CVSS v3
6.5
EG Score
6.5(low)
EPSS
34.4%
KEV
Not listed

Published

March 30, 2026

Last Modified

June 30, 2026

References (19)

Vendor Advisories for CVE-2026-33983(5)

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

Patch Availability(14)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatfreerdp-2:2.11.7-7.el9_8.12026-05-19redhat
redhatfreerdp-2:3.10.3-12.el10_2.22026-05-19redhat
redhatfreerdp-2:2.2.0-7.el8_6.62026-04-30redhat
redhatfreerdp-2:2.2.0-12.el8_8.62026-04-30redhat
redhatfreerdp-2:2.0.0-46.rc4.el8_2.112026-04-29redhat
redhatfreerdp-2:2.2.0-13.el8_42026-04-29redhat
redhatfreerdp-2:2.4.1-6.el9_2.72026-04-28redhat
redhatfreerdp-2:2.4.1-3.el9_0.52026-04-28redhat
redhatfreerdp-2:3.10.3-3.el10_0.62026-04-28redhat
redhatfreerdp-2:2.11.2-1.el9_4.62026-04-27redhat
redhatfreerdp-2:2.11.7-1.el9_6.82026-04-22redhat
redhatfreerdp-2:2.11.7-7.el8_102026-04-20redhat
redhatfreerdp-2:2.11.7-1.el9_7.62026-04-16redhat
redhatfreerdp-2:3.10.3-5.el10_1.62026-04-16redhat

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(2)

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

Additional Vendor Advisories

(9)

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 9× in last 7d / 15× 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. 2026-07-11 08:27 UTCEPSS rescore
  2. 2026-07-09 19:10 UTCEPSS rescore
  3. 2026-07-08 15:15 UTCEPSS rescore
  4. 2026-07-07 13:46 UTCEPSS rescore
  5. 2026-07-06 16:27 UTCEPSS rescore
  6. 2026-07-06 16:27 UTCEPSS rescore
  7. 2026-07-06 02:23 UTCEPSS rescore
  8. 2026-07-06 02:23 UTCEPSS rescore
  9. 2026-07-05 02:30 UTCEPSS rescore
  10. 2026-07-04 06:31 UTCEPSS rescore
  11. 2026-07-01 15:06 UTCEPSS rescore
  12. 2026-06-30 23:22 UTCEPSS rescore
  13. 2026-06-30 04:36 UTCEG score recompute
  14. 2026-06-30 04:36 UTCVendor advisory
  15. 2026-06-30 04:32 UTCNVD updatefirst tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-33983?
CVE-2026-33983 is a medium vulnerability published on March 30, 2026. FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, progressivedecompresstileupgrade() detects a mismatch via progressiverfxquantcmpequal() but only emits WLogWARN, execution continues. The wrapped value (247) is used as a shift exponent, causing undefined…
When was CVE-2026-33983 disclosed?
CVE-2026-33983 was first published in the National Vulnerability Database on March 30, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33983 actively exploited?
CVE-2026-33983 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 34.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-33983?
CVE-2026-33983 has a CVSS v3 base score of 6.5 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-33983?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33983, 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

Explore the affected products and dependency analysis for CVE-2026-33983

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