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01 Record

CVE-2026-91953

FreeRDP before 3.31.0 Heap Buffer Overflow via LB_LOAD_BALANCE_INFO

HighPUBLISHEDCNA: VulnCheck
CNA base score7.1 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
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02 Description

FreeRDP before 3.31.0 Heap Buffer Overflow via LB_LOAD_BALANCE_INFO

03 Exploitation and scoring

Exploitation
Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
SSVC decision
  • ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.47% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 40.4% of scored records. A rank, not a probability.
NVD base score
7.1 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD analysis status
Analyzed. NVD last modified this record on 2026-09-24.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-09-15 15:18Z1 MO AGO
Last updated
2026-09-15 16:01Z1 MO AGO
Reserved
2026-09-15
Assigning CNA
VulnCheck
Record state
PUBLISHED
Severity
High (CVSS 7.1)
CNA CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Weaknesses
  • CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base
Data version
5.2
Document digest
91dfa81927055efac6875b1fb4915df72283ae3dd9e70ff8f7aae899103cadda

05 Affected products

VendorProductVersionsPlatforms
FreeRDPFreeRDP0 to < 3.31.0—

06 References

07 Fixed in

AlmaLinux 8

  • freerdp
    Fixed in 2:2.11.7-14.el8_10
  • freerdp-devel
    Fixed in 2:2.11.7-14.el8_10
  • freerdp-libs
    Fixed in 2:2.11.7-14.el8_10
  • libwinpr
    Fixed in 2:2.11.7-14.el8_10
  • libwinpr-devel
    Fixed in 2:2.11.7-14.el8_10

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • freerdp
    Fixed in 2:2.11.7-7.el9_8.8
  • freerdp-devel
    Fixed in 2:2.11.7-7.el9_8.8
  • freerdp-libs
    Fixed in 2:2.11.7-7.el9_8.8
  • libwinpr
    Fixed in 2:2.11.7-7.el9_8.8
  • libwinpr-devel
    Fixed in 2:2.11.7-7.el9_8.8

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 10

  • freerdp
    Fixed in 2:3.10.3-12.el10_2.14
  • freerdp-devel
    Fixed in 2:3.10.3-12.el10_2.14
  • freerdp-libs
    Fixed in 2:3.10.3-12.el10_2.14
  • freerdp-server
    Fixed in 2:3.10.3-12.el10_2.14
  • libwinpr
    Fixed in 2:3.10.3-12.el10_2.14
  • libwinpr-devel
    Fixed in 2:3.10.3-12.el10_2.14

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • freerdp
    Fixed in 2:2.11.7-14.el8_10
  • freerdp-devel
    Fixed in 2:2.11.7-14.el8_10
  • freerdp-libs
    Fixed in 2:2.11.7-14.el8_10
  • libwinpr
    Fixed in 2:2.11.7-14.el8_10
  • libwinpr-devel
    Fixed in 2:2.11.7-14.el8_10

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • freerdp
    Fixed in 2:2.11.7-7.el9_8.8
  • freerdp-devel
    Fixed in 2:2.11.7-7.el9_8.8
  • freerdp-libs
    Fixed in 2:2.11.7-7.el9_8.8
  • libwinpr
    Fixed in 2:2.11.7-7.el9_8.8
  • libwinpr-devel
    Fixed in 2:2.11.7-7.el9_8.8

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 10

  • freerdp
    Fixed in 2:3.10.3-12.el10_2.14
  • freerdp-devel
    Fixed in 2:3.10.3-12.el10_2.14
  • freerdp-libs
    Fixed in 2:3.10.3-12.el10_2.14
  • freerdp-server
    Fixed in 2:3.10.3-12.el10_2.14
  • libwinpr
    Fixed in 2:3.10.3-12.el10_2.14
  • libwinpr-devel
    Fixed in 2:3.10.3-12.el10_2.14

Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • freerdp2
    No fix yet

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • freerdp3
    No fix yet

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • freerdp3
    Fixed in 3.31.0+dfsg-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 16.04 LTS

  • freerdp
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • freerdp
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • freerdp2
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 24.04 LTS

  • freerdp3
    Fixed in 3.31.0+dfsg-0ubuntu0.24.04.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 26.04 LTS

  • freerdp3
    Fixed in 3.31.0+dfsg-0ubuntu0.26.04.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • freerdp2
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 20.04 LTS

  • freerdp2
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 24.04 LTS

  • freerdp2
    No fix yet

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.