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Servers and applications

CVE-2019-5544

OpenSLP as used in ESXi and the Horizon DaaS appliances has a heap overwrite issue. VMware has evaluated the severity of this issue to be in the Critical severity range with a maximum CVSSv3 base score of 9.8.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 3 Nov 2021.

Severity
Critical 9.8
Published
6 Dec 2019
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
98% in the next 30 daysHigher than 99% of CVEs. EPSS by FIRST, 10 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
VMware ESXiServers and applications · cpe:o:vmware:esxi
  • Version 6.7-670-201911001
  • Version 6.7-670-201908221
  • Version 6.7-670-201908220
  • Version 6.7-670-201908219
All 239 release lines
  • Version 6.0-1a
  • Version 6.0-1b
  • Version 6.0-3a
  • Version 6.0
  • Version 6.0-1
  • Version 6.0-2
  • Version 6.0-3
  • Version 6.0-600-201504401
  • Version 6.0-600-201505401
  • Version 6.0-600-201507101
  • Version 6.0-600-201507102
  • Version 6.0-600-201507401
  • Version 6.0-600-201507402
  • Version 6.0-600-201507403
  • Version 6.0-600-201507404
  • Version 6.0-600-201507405
  • Version 6.0-600-201507406
  • Version 6.0-600-201507407
  • Version 6.0-600-201509101
  • Version 6.0-600-201509102
  • Version 6.0-600-201509201
  • Version 6.0-600-201509202
  • Version 6.0-600-201509203
  • Version 6.0-600-201509204
  • Version 6.0-600-201509205
  • Version 6.0-600-201509206
  • Version 6.0-600-201509207
  • Version 6.0-600-201509208
  • Version 6.0-600-201509209
  • Version 6.0-600-201509210
  • Version 6.0-600-201510401
  • Version 6.0-600-201511401
  • Version 6.0-600-201601101
  • Version 6.0-600-201601102
  • Version 6.0-600-201601401
  • Version 6.0-600-201601402
  • Version 6.0-600-201601403
  • Version 6.0-600-201601404
  • Version 6.0-600-201601405
  • Version 6.0-600-201602401
  • Version 6.0-600-201603101
  • Version 6.0-600-201603102
  • Version 6.0-600-201603201
  • Version 6.0-600-201603202
  • Version 6.0-600-201603203
  • Version 6.0-600-201603204
  • Version 6.0-600-201603205
  • Version 6.0-600-201603206
  • Version 6.0-600-201603207
  • Version 6.0-600-201603208
  • Version 6.0-600-201605401
  • Version 6.0-600-201608101
  • Version 6.0-600-201608401
  • Version 6.0-600-201608402
  • Version 6.0-600-201608403
  • Version 6.0-600-201608404
  • Version 6.0-600-201608405
  • Version 6.0-600-201610410
  • Version 6.0-600-201611401
  • Version 6.0-600-201611402
  • Version 6.0-600-201611403
  • Version 6.0-600-201702101
  • Version 6.0-600-201702102
  • Version 6.0-600-201702201
  • Version 6.0-600-201702202
  • Version 6.0-600-201702203
  • Version 6.0-600-201702204
  • Version 6.0-600-201702205
  • Version 6.0-600-201702206
  • Version 6.0-600-201702207
  • Version 6.0-600-201702208
  • Version 6.0-600-201702209
  • Version 6.0-600-201702210
  • Version 6.0-600-201702211
  • Version 6.0-600-201702212
  • Version 6.0-600-201703401
  • Version 6.0-600-201706101
  • Version 6.0-600-201706102
  • Version 6.0-600-201706103
  • Version 6.0-600-201706401
  • Version 6.0-600-201706402
  • Version 6.0-600-201706403
  • Version 6.0-600-201710301
  • Version 6.0-600-201811001
  • Version 6.0-600-201811401
  • Version 6.5
  • Version 6.5-650-201701001
  • Version 6.5-650-201703001
  • Version 6.5-650-201703002
  • Version 6.5-650-201704001
  • Version 6.5-650-201707101
  • Version 6.5-650-201707102
  • Version 6.5-650-201707103
  • Version 6.5-650-201707201
  • Version 6.5-650-201707202
  • Version 6.5-650-201707203
  • Version 6.5-650-201707204
  • Version 6.5-650-201707205
  • Version 6.5-650-201707206
  • Version 6.5-650-201707207
  • Version 6.5-650-201707208
  • Version 6.5-650-201707209
  • Version 6.5-650-201707210
  • Version 6.5-650-201707211
  • Version 6.5-650-201707212
  • Version 6.5-650-201707213
  • Version 6.5-650-201707214
  • Version 6.5-650-201707215
  • Version 6.5-650-201707216
  • Version 6.5-650-201707217
  • Version 6.5-650-201707218
  • Version 6.5-650-201707219
  • Version 6.5-650-201707220
  • Version 6.5-650-201707221
  • Version 6.5-650-201710001
  • Version 6.5-650-201712001
  • Version 6.5-650-201803001
  • Version 6.5-650-201806001
  • Version 6.5-650-201808001
  • Version 6.5-650-201810001
  • Version 6.5-650-201810002
  • Version 6.5-650-201811001
  • Version 6.5-650-201811002
  • Version 6.5-650-201811301
  • Version 6.5-650-201901001
  • Version 6.5-650-201903001
  • Version 6.5-650-201905001
  • Version 6.5-650-201908001
  • Version 6.5-650-201910001
  • Version 6.5-650-201911001
  • Version 6.5-650-201911401
  • Version 6.5-650-201911402
  • Version 6.5-650-20191004001
  • Version 6.7
  • Version 6.7-670-201806001
  • Version 6.7-670-201807001
  • Version 6.7-670-201808001
  • Version 6.7-670-201810001
  • Version 6.7-670-201810101
  • Version 6.7-670-201810102
  • Version 6.7-670-201810103
  • Version 6.7-670-201810201
  • Version 6.7-670-201810202
  • Version 6.7-670-201810203
  • Version 6.7-670-201810204
  • Version 6.7-670-201810205
  • Version 6.7-670-201810206
  • Version 6.7-670-201810207
  • Version 6.7-670-201810208
  • Version 6.7-670-201810209
  • Version 6.7-670-201810210
  • Version 6.7-670-201810211
  • Version 6.7-670-201810212
  • Version 6.7-670-201810213
  • Version 6.7-670-201810214
  • Version 6.7-670-201810215
  • Version 6.7-670-201810216
  • Version 6.7-670-201810217
  • Version 6.7-670-201810218
  • Version 6.7-670-201810219
  • Version 6.7-670-201810220
  • Version 6.7-670-201810221
  • Version 6.7-670-201810222
  • Version 6.7-670-201810223
  • Version 6.7-670-201810224
  • Version 6.7-670-201810225
  • Version 6.7-670-201810226
  • Version 6.7-670-201810227
  • Version 6.7-670-201810228
  • Version 6.7-670-201810229
  • Version 6.7-670-201810230
  • Version 6.7-670-201810231
  • Version 6.7-670-201810232
  • Version 6.7-670-201810233
  • Version 6.7-670-201810234
  • Version 6.7-670-201811001
  • Version 6.7-670-201901001
  • Version 6.7-670-201901401
  • Version 6.7-670-201901402
  • Version 6.7-670-201901403
  • Version 6.7-670-201903001
  • Version 6.7-670-201904001
  • Version 6.7-670-201904201
  • Version 6.7-670-201904202
  • Version 6.7-670-201904203
  • Version 6.7-670-201904204
  • Version 6.7-670-201904205
  • Version 6.7-670-201904206
  • Version 6.7-670-201904207
  • Version 6.7-670-201904208
  • Version 6.7-670-201904209
  • Version 6.7-670-201904210
  • Version 6.7-670-201904211
  • Version 6.7-670-201904212
  • Version 6.7-670-201904213
  • Version 6.7-670-201904214
  • Version 6.7-670-201904215
  • Version 6.7-670-201904216
  • Version 6.7-670-201904217
  • Version 6.7-670-201904218
  • Version 6.7-670-201904219
  • Version 6.7-670-201904220
  • Version 6.7-670-201904221
  • Version 6.7-670-201904222
  • Version 6.7-670-201904223
  • Version 6.7-670-201904224
  • Version 6.7-670-201904225
  • Version 6.7-670-201904226
  • Version 6.7-670-201904227
  • Version 6.7-670-201904228
  • Version 6.7-670-201904229
  • Version 6.7-670-201905001
  • Version 6.7-670-201906002
  • Version 6.7-670-201908101
  • Version 6.7-670-201908102
  • Version 6.7-670-201908103
  • Version 6.7-670-201908104
  • Version 6.7-670-201908201
  • Version 6.7-670-201908202
  • Version 6.7-670-201908203
  • Version 6.7-670-201908204
  • Version 6.7-670-201908205
  • Version 6.7-670-201908206
  • Version 6.7-670-201908207
  • Version 6.7-670-201908208
  • Version 6.7-670-201908209
  • Version 6.7-670-201908210
  • Version 6.7-670-201908211
  • Version 6.7-670-201908212
  • Version 6.7-670-201908213
  • Version 6.7-670-201908214
  • Version 6.7-670-201908215
  • Version 6.7-670-201908216
  • Version 6.7-670-201908217
  • Version 6.7-670-201908218
  • Version 6.7-670-201908219
  • Version 6.7-670-201908220
  • Version 6.7-670-201908221
  • Version 6.7-670-201911001

Known exploited

CISA name
VMware ESXi and Horizon DaaS OpenSLP Heap-Based Buffer Overflow Vulnerability
Required action
Apply updates per vendor instructions.
Due for US agencies
3 May 2022
Used in ransomware
Yes, known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2019-5544
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2019-5544