CVE-2026-34352

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.2%, top 84% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Elevated
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: Elevated riskExposed: 0

A fix is available — apply it.

In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions.

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: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
16%
KEV
Not listed

Published

March 26, 2026

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated Sep 14, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit.
generic

[BUG] x0vncserver uses 0777 permissions for framebuffer shared memory · Issue #2079 · TigerVNC/tigervnc · GitHub

https://github.com/TigerVNC/tigervnc/issues/2079
generic

oss-security - TigerVNC 1.16.2 security release

https://www.openwall.com/lists/oss-security/2026/03/26/7
generic

TigerVNC - Browse /stable/1.16.2 at SourceForge.net

https://sourceforge.net/projects/tigervnc/files/stable/1.16.2
generic
https://groups.google.com/g/tigervnc-announce/c/anHL9WLshLI
github_commit

commit 0b5cab169d84 (TigerVNC/tigervnc)

Fix landed in TigerVNC/tigervnc commit 0b5cab169d84 — awaiting tagged release

https://github.com/TigerVNC/tigervnc/commit/0b5cab169d847789efa54459a87659d3fd484393

Vendor Advisories for CVE-2026-34352(13)

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

Patch Availability(12)

Vendor / EcosystemFixed in / PatchReleasedSource
redhattigervnc-0:1.12.0-6.el8_6.172026-06-08redhat
redhattigervnc-0:1.1.0-25.el6_10.162026-06-04redhat
redhattigervnc-0:1.11.0-8.el8_4.152026-06-04redhat
redhattigervnc-0:1.12.0-15.el8_8.172026-06-04redhat
redhattigervnc-0:1.14.1-10.el9_62026-06-02redhat
redhattigervnc-0:1.8.0-36.el7_9.42026-06-02redhat
redhattigervnc-0:1.11.0-22.el9_0.172026-05-28redhat
redhattigervnc-0:1.12.0-14.el9_2.142026-05-26redhat
redhattigervnc-0:1.13.1-8.el9_4.92026-05-26redhat
redhattigervnc-0:1.15.0-7.el9_8.12026-05-19redhat
redhattigervnc-0:1.15.0-9.el8_102026-05-04redhat
redhattigervnc-0:1.15.0-6.el9_7.12026-04-27redhat

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 rangeFixed inDependents
tigervnc1.11.0+dfsg-2 ... 1.15.0+dfsg-2.1~deb13u1 (19 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
tigervnc1.12.0+dfsg-8 ... 1.15.0+dfsg-2.1~deb13u1 (9 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
tigervnc1.15.0+dfsg-21.15.0+dfsg-2.1~deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
tigervnc1.15.0+dfsg-2, 1.15.0+dfsg-2.1~deb13u11.15.0+dfsg-2.1—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× in last 7d / 29× 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.

Showing the most recent 100 of 257 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-34352?
CVE-2026-34352 is a critical vulnerability published on March 26, 2026. In TigerVNC before 1.16.2, Image.cxx in x0vncserver allows other users to observe or manipulate the screen contents, or cause an application crash, because of incorrect permissions.
When was CVE-2026-34352 disclosed?
CVE-2026-34352 was first published in the National Vulnerability Database on March 26, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-34352 actively exploited?
CVE-2026-34352 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 83.7% of all scored CVEs.
What is the CVSS score of CVE-2026-34352?
CVE-2026-34352 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-34352?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-34352, 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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