CVE-2019-1703

highpriority · track · 35EPSS 0.029 · 87 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

2.91% (87th) EPSS

CVSS 7.8 · high

Is it mine?

16 products

Check your exposure

Who says so?

5 sources

cnnvd · enisa_euvd · fstec_bdu · cisco_csaf

EPSS · scored 2026-10-27

A vulnerability in the internal packet-processing functionality of Cisco Firepower Threat Defense (FTD) Software for the Cisco Firepower 2100 Series could allow an unauthenticated, remote attacker to cause an affected device to stop processing traffic, resulting in a denial of service (DoS) condition. The vulnerability is due to a logic error, which may prevent ingress buffers from being replenished under specific traffic conditions. An attacker could exploit this vulnerability by sending a series of crafted packets to an affected device. A successful exploit could allow the attacker to consume all input buffers, which are shared between all interfaces, leading to a queue wedge condition in all active interfaces. This situation would cause an affected device to stop processing any incoming traffic and result in a DoS condition until the device is reloaded manually.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

Fixed6.2.1cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Fixed6.2.2cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Fixed6.2.2.1cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Fixed6.2.2.2cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Fixed6.2.2.3cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Fixed6.2.2.4cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Fixed6.2.3cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Fixed6.2.3.1cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Fixed6.2.3.2cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Fixed6.2.3.3cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Fixed6.2.3.4cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Fixed6.2.3.5cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com
Fixed6.2.3.6cisco_csaf
Cisco has released software updates that address this vulnerability.
https://software.cisco.com

cvss

Technical severity, 0–10. One row per scoring source.

8.6

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.07.8highAV:N/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 10 · impact 6.9

v3.18.6highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 3.9 · impact 4

v3.08.6highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · ENISA EU

v3.08.6highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · psirt@cisco.com USexploitability 3.9 · impact 4

v3.08.6highCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · Cisco PSIRT US

v3.18.6highAV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:Hsecondary · FSTEC (BDU) RU

v3.17.9highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-770USprimaryCWE-400USCWE-400US

affected products (16)

Products and version ranges known to be affected.

Cisco 6.2.1all versionscisco_csafUS
Cisco 6.2.2all versionscisco_csafUS
Cisco 6.2.2.1all versionscisco_csafUS
Cisco 6.2.2.2all versionscisco_csafUS
Cisco 6.2.2.3all versionscisco_csafUS
Cisco 6.2.2.4all versionscisco_csafUS
Cisco 6.2.3all versionscisco_csafUS
Cisco 6.2.3.1all versionscisco_csafUS
Cisco 6.2.3.2all versionscisco_csafUS
Cisco 6.2.3.3all versionscisco_csafUS
Cisco 6.2.3.4all versionscisco_csafUS
Cisco 6.2.3.5all versionscisco_csafUS
Cisco 6.2.3.6all versionscisco_csafUS
Cisco Cisco Firepower Threat Defense Softwareunspecified → 6.2.3.12enisa_euvdEU
Cisco Systems Inc. Firepower Threat Defense6.2.1 → 6.2.3.12fstec_bduRU
cisco secure firewall threat defense6.2.1 → 6.2.3.12nvdUScpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*

advisories (1)

Vendor and ecosystem advisories describing this.

cisco-sa-20190501-frpwr-dosCisco Firepower Threat Defense Software Packet Processing Denial of Service Vulnerability2019-05-01csaf · cisco_csafUS
A vulnerability in the internal packet-processing functionality of Cisco Firepower Threat Defense (FTD) Software for the Cisco Firepower 2100 Series could allow an unauthenticated, remote attacker to cause an affected device to stop processing traffic, resulting in a denial of service (DoS) condition. The vulnerability is due to a logic error, which may prevent ingress buffers from being replenished under specific traffic conditions. An attacker could exploit this vulnerability by sending a series of crafted packets to an affected device. A successful exploit could allow the attacker to consume all input buffers, which are shared between all interfaces, leading to a queue wedge condition in all active interfaces. This situation would cause an affected device to stop processing any incoming traffic and result in a DoS condition until the device is reloaded manually. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

also known as (4)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisco_csaf nvd NVD CVE.org MITRE

published 2019-05-03modified 2026-08-11

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+3263 more

references (11)

External citations — patches, advisories, analysis.

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