Apache Tomcat through 7.0.x allows remote attackers to cause a denial of service (daemon outage) via partial HTTP requests, as demonstrated by Slowloris.
CVE-2012-5568
“—” beside the score: it is equal to NVD's CVSS v2 base score.
This CVE was only ever scored under CVSS v2.0. NVD CVSS v2.0 base 5.0 — NVD rates that MEDIUM (NVD's v2 bands: LOW 0.0–3.9 / MEDIUM 4.0–6.9 / HIGH 7.0–10.0; no CRITICAL band). Vector AV:N/AC:L/Au:N/C:N/I:N/A:P. CVSS v2 is an older, coarser metric than v3.1/v4.0 (no Scope, no User Interaction, no Attack Requirements), so it is not directly comparable to a v3 or v4 score. NVD has never re-scored this record under v3. EPSS predicts 9.6% exploitation probability in the next 30 days; it does not lift the v2 base. EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated) sets EG Risk's exploitation input, not EPSS. Confidence: LOW.
Also known asEUVD-2012-5459 (ENISA EUVD) · GHSA-v35g-wxj7-gxp3 (GitHub Security Advisories)Source: ENISA EUVD
- Lower severity and no public exploit yet
No fix has been recorded since the CVE record was published in 2012 — use a compensating control (WAF / firewall / segmentation) and check the vendor's advisory.
The CVE record's description, written by its CNA (Red Hat, Inc.), states the affected versions: "Apache Tomcat through 7.0.x allows remote attackers to cause a denial of service (daemon outage) via partial HTTP requests, as demonstrated by Slowloris." No release containing a fix is confirmed on record.
- CVSS v2.0 (legacy)
- 5.0MEDIUMNVD never assigned a CVSS v3 rating to this CVE
- EG Score
- 5.0MEDIUMlow confidence
- EG Risk
- 54EG Risk 54/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity50% × 45%Impact severity (EG Severity): CVSS 5.0 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.Automatability100% × 15%CISA's SSVC Automatable value: yes (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: No fix has been recorded since the CVE record was published in 2012. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high. - EPSS PROB
- 9.6%
- EPSS %ILE
- 95th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (5.0): severity, escalated by confirmed exploitation. This CVE's 5.0 is its impact severity (EG Severity), not escalated.
- EG Severity
- 5.0 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v2.0 · CVSS v2.0AV:N/AC:L/Au:N/C:N/I:N/A:P
- EG Likelihood
- 9.6% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-07). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).
No fix has been recorded since the CVE record was published in 2012. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.
No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
November 30, 2012
Last Modified
October 9, 2026
References (10)
- secalert@redhat · CVE Programhttp://captainholly.wordpress.com/2009/06/19/slowloris-vs-tomcat/Exploit · Third Party Advisory
- secalert@redhat · CVE Programhttp://lists.opensuse.org/opensuse-updates/2012-12/msg00089.htmlMailing List · Third Party Advisory
- secalert@redhat · CVE Programhttp://lists.opensuse.org/opensuse-updates/2012-12/msg00090.htmlMailing List · Third Party Advisory
- secalert@redhat · CVE Programhttp://lists.opensuse.org/opensuse-updates/2013-01/msg00037.htmlMailing List · Third Party Advisory
- secalert@redhat · CVE Programhttp://openwall.com/lists/oss-security/2012/11/26/2Mailing List · Third Party Advisory
- secalert@redhat · CVE Programhttp://tomcat.10.n6.nabble.com/How-does-Tomcat-handle-a-slow-HTTP-DoS-tc2147776.htmlVendor Advisory
- secalert@redhat · CVE Programhttp://tomcat.10.n6.nabble.com/How-does-Tomcat-handle-a-slow-HTTP-DoS-tc2147779.htmlVendor Advisory
- secalert@redhat · CVE Programhttp://www.securityfocus.com/bid/56686 (archived copy: the site no longer serves it)Third Party Advisory · VDB Entry
- secalert@redhat · CVE Programhttps://bugzilla.redhat.com/show_bug.cgi?id=880011Issue Tracking · Third Party Advisory
- secalert@redhat · CVE Programhttps://exchange.xforce.ibmcloud.com/vulnerabilities/80317Third Party Advisory · VDB Entry
Data Freshness Timeline
(refreshed 9× in last 7d / 37× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.
Showing the most recent 96 of 177 refreshes on record for this CVE.
A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 4 repeat rows among the latest 100 are merged into the row they repeat. The 81 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-11-09 16:26 UTCEPSS rescoreEPSS 9.6% · 95th percentile
- 2026-11-08 16:28 UTCEPSS rescoreEPSS 9.6% · 95th percentile
- 2026-11-08 00:52 UTCGHSA enrichmentGHSA-v35g-wxj7-gxp3 · GitHub severity MODERATE
- 2026-11-08 00:52 UTCEG score recompute
- 2026-11-07 16:28 UTCEPSS rescoreEPSS 9.6% · 95th percentile
- 2026-11-06 16:27 UTCEPSS rescoreEPSS 9.6% · 95th percentile
- 2026-11-05 16:27 UTCEPSS rescoreEPSS 9.6% · 95th percentile
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- 2026-10-31 16:26 UTCEPSS rescoreEPSS 9.6% · 95th percentile
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- 2026-10-29 16:26 UTCEPSS rescoreEPSS 9.6% · 95th percentile
- 2026-10-29 14:22 UTCEG score recompute
- 2026-10-29 14:22 UTCGHSA enrichmentGHSA-v35g-wxj7-gxp3
- 2026-10-28 16:26 UTCEPSS rescoreEPSS 9.6% · 95th percentile
- 2026-10-27 16:26 UTCEPSS rescoreEPSS 9.6% · 95th percentile
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- 2026-10-25 20:11 UTCEG score recompute
- 2026-10-25 16:26 UTCEPSS rescoreEPSS 9.6% · 95th percentile
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- 2026-10-20 16:26 UTCEPSS rescoreEPSS 9.6% · 95th percentile
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- 2026-10-18 11:23 UTCEG score recompute
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- 2026-10-12 21:28 UTCEG score recompute
- 2026-10-12 16:27 UTCEPSS rescoreEPSS 9.6% · 95th percentile
- 2026-10-12 01:35 UTCEG score recompute
- 2026-10-11 13:39 UTCEPSS rescoreEPSS 9.6% · 95th percentile
- 2026-10-10 19:54 UTCEPSS rescoreEPSS 9.6% · 95th percentile
- 2026-10-09 20:34 UTCGHSA enrichmentGHSA-v35g-wxj7-gxp3
- 2026-10-09 20:33 UTCNVD update
- 2026-10-09 20:00 UTCEPSS rescoreEPSS 9.6% · 95th percentile
- 2026-10-09 19:19 UTCEG score recompute
- 2026-10-09 19:19 UTCGHSA enrichmentGHSA-v35g-wxj7-gxp3
- 2026-10-09 19:18 UTCMITRE cvelistV5
- 2026-10-08 16:34 UTCEPSS rescoreEPSS 9.6% · 95th percentile
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- 2026-09-29 08:32 UTCEG score recompute
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- 2026-07-26 13:46 UTCEG score recomputeFirst assessed: 5.0 MEDIUM
- 2026-07-25 14:12 UTCEPSS rescoreEPSS 9.6% · 94th percentile
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- 2026-07-23 01:08 UTCEG score recompute
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- 2026-07-22 14:04 UTCEPSS rescoreEPSS 9.6% · 94th percentile
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Frequently asked(4)
What is CVE-2012-5568?
When was CVE-2012-5568 made public?
Is CVE-2012-5568 actively exploited?
How do I remediate CVE-2012-5568?
Dependency Blast Radius
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