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CVE-2014-0160

Heartbleed

The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly handle Heartbeat Extension packets, which allows remote attackers to obtain sensitive information from process memory via crafted packets that trigger a buffer over-read, as demonstrated by reading private keys, related to d1_both.c and t1_lib.c, aka the Heartbleed bug.

CVSS
7.5Highscored by CISA
Exploited in the wild
Yes, in CISA KEV since 4 May 2022CISA deadline for US federal agencies: 25 May 2022public exploit code
EPSS
> 99.9%chance of exploitation in the next 30 daystop 0.1% of scored CVEsFIRST score of 11 Nov 2026
Fix
Patch availablesee the advisories in the references
Published
7 Apr 2014analysed here 12 Nov 2026

Do first. Apply updates per vendor instructions. (CISA's required action for this KEV entry)

Summary

Triage

Attack surface
Server-side
Exploitable
At runtime
Attack vector
network
Weakness
Can a WAF block it?
No. See why

The summary, impact and action text on this page are written by our AI analysis pipeline, or taken from the NVD description when a CVE was imported from NVD. They are not the vendor's wording: check them against the sources. A longer AI executive summary and technical analysis are generated for signed-in accounts on the Max plan.

Affected products

Products named in our analysis

  • openssl:openssl
  • filezilla-project:filezilla_server
  • siemens:application_processing_engine_firmware
  • siemens:cp_1543-1_firmware
  • siemens:simatic_s7-1500_firmware
  • siemens:simatic_s7-1500t_firmware
  • siemens:elan-8.2
  • siemens:wincc_open_architecture
  • intellian:v100_firmware
  • intellian:v60_firmware
  • mitel:micollab
  • mitel:mivoice
  • opensuse:opensuse
  • canonical:ubuntu_linux
  • fedoraproject:fedora
  • redhat:gluster_storage
  • redhat:storage
  • redhat:virtualization
  • redhat:enterprise_linux_desktop
  • redhat:enterprise_linux_server
  • redhat:enterprise_linux_server_aus
  • redhat:enterprise_linux_server_eus
  • redhat:enterprise_linux_server_tus
  • redhat:enterprise_linux_workstation
  • debian:debian_linux
  • ricon:s9922l_firmware
  • broadcom:symantec_messaging_gateway
  • splunk:splunk

Fix and mitigation

WAF and other mitigations

Can a WAF block it? No. This is an out-of-bounds read. Generic WAF rules do not recognise the input that triggers it; only a rule written for this specific CVE can, and only if the triggering request has a recognisable shape.

Also consider: patch

Based on the weakness type only; no CVE-specific evidence yet. We check Cloudflare, AWS, Google Cloud Armor and Azure; for Akamai, Imperva, Fastly, F5, ask your vendor.

Remediation steps (AI-written)

Step-by-step remediation is generated for accounts on the Max plan, for CVEs that match a technology in their stack. Add this technology to your stack to see the fix checklist.

Exploitation evidence

CISA KEV catalog
Listed since 4 May 2022.
CISA due date
25 May 2022, the remediation deadline for US federal agencies
CISA required action
Apply updates per vendor instructions.
Public exploit code
Yes: 4 on Exploit-DB · 2 Metasploit modules · 75 GitHub proofs of concept
CISA SSVC
exploitation active, automatable yes, technical impact partialAssessed by CISA 7 Feb 2025 (SSVC 2.0.3). Exploitation is none, poc (public proof of concept) or active.

Exploit-DB

Metasploit

GitHub proofs of concept

and 71 more repositories

Listed so you can judge urgency, not as a recommendation to run anything. GitHub “proofs of concept” are unvetted: some are fake or carry malware. Exploit-DB marks the entries its staff verified.

Timeline

  1. 7 Apr 2014First public exploit or proof of concept
  2. 7 Apr 2014Published1 day later
  3. 4 May 2022Added to CISA KEV (exploited in the wild)2,948 days (about 8 years) later
  4. 25 May 2022CISA remediation due date (US federal agencies)21 days later
  5. 7 Feb 2025CISA SSVC assessment: exploitation active990 days (about 3 years) later
  6. 22 Oct 2025CVE record last updated256 days (about 9 months) later
  7. 12 Nov 2026Analysed by vulneraibility.com387 days (about 1 year) later

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

MetricValueWhat it means
Attack vectorNetworkReachable over the internet or any routable network.
Attack complexityLowRepeatable attack, no special conditions.
Privileges requiredNoneThe attacker needs no prior access.
User interactionNoneNo victim action needed.
ScopeUnchangedImpact stays within the vulnerable component.
ConfidentialityHighTotal data disclosure possible.
IntegrityNoneNo unauthorised modification.
AvailabilityNoneThe service stays up.

Common questions

Is CVE-2014-0160 being exploited?

Yes. CVE-2014-0160 appears in CISA's Known Exploited Vulnerabilities catalog, which means exploitation in the wild has been confirmed and reported. Treat it as active rather than theoretical, and patch it ahead of higher-scoring vulnerabilities that carry no exploitation evidence.

How severe is CVE-2014-0160?

CVE-2014-0160 is rated High with a CVSS score of 7.5. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2014-0160?

Yes. A fix has been recorded for CVE-2014-0160. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.

What does CVE-2014-0160 affect?

CVE-2014-0160 affects openssl:openssl, filezilla-project:filezilla_server, siemens:application_processing_engine_firmware, siemens:cp_1543-1_firmware, and 24 further products or versions. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

References

NVDCVE.orgCVE DetailsSource

50 references in the CVE record, grouped by the tags the record gives them.

Advisories (27)

Show 21 more

Other links (23)

Show 17 more

Where the data on this page comes from

Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.

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