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NVD / CVE Program· CNA mitre

CVE-2011-5121: The Antivirus component in Comodo Internet Security before 5.3.175888.1227 does not properly check whether unspecified X.509 certificates…

CriticalCVSS 10.0 · v2.0—No exploit No fix recorded

Noroxi assessment

Priority: Plan (action score 40/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.2% (FIRST EPSS); higher than 69.1% of all records.
  • No special conditions are required; it is repeatable.
  • According to the record, no fixed version is available yet.

Add it to your regular patch cycle. Update when a fix is released; follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

The Antivirus component in Comodo Internet Security before 5.3.175888.1227 does not properly check whether unspecified X.509 certificates are revoked, which has unknown impact and remote attack vectors.

Published
Aug 25, 2012
Updated
Jun 16, 2026
EPSS
1.2% · 69th percentile

Report tools

JSON

Action score

40

Plan

Add it to your regular patch cycle.

CVSS
40 / 40 · 10.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.2%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2011-5121

When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
comodocomodo internet security

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • comodo comodo internet securityup to 5.3.174622.1216 inclusive
  • comodo comodo internet security3.0.14.276
  • comodo comodo internet security3.0.15.277
  • comodo comodo internet security3.0.16.295
  • comodo comodo internet security3.0.17.304
  • comodo comodo internet security3.0.18.309
  • comodo comodo internet security3.0.19.318
  • comodo comodo internet security3.0.20.320
+12 more rows
  • comodo comodo internet security3.0.22.349
  • comodo comodo internet security3.0.23.364
  • comodo comodo internet security3.0.24.368
  • comodo comodo internet security3.0.25.378
  • comodo comodo internet security3.10.102363.531
  • comodo comodo internet security3.11.108364.552
  • comodo comodo internet security3.12.111745.560
  • comodo comodo internet security3.13.121240.574
  • comodo comodo internet security3.13.125662.579
  • comodo comodo internet security3.14.130099.587
  • comodo comodo internet security3.5.53896.424
  • comodo comodo internet security3.5.54375.427

Same product

comodo: all records

Other highest-scoring records for the same primary product.

  • CVE-2011-5123The Antivirus component in Comodo Internet Security before 5.3.175888.1227 does not check whether X.509 certificates in signed executable…
    40Plan
  • CVE-2010-5185The Antivirus component in Comodo Internet Security before 5.3.174622.1216 does not check whether X.509 certificates in signed executable…
    40Plan
  • CVE-2019-18215An issue was discovered in signmgr.dll 6.5.0.819 in Comodo Internet Security through 12.0.
    31Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2011-5119Aug 25, 2012 · Multiple race conditions in Comodo Internet Security before 5.8.211697.2124 allow local users to bypass the Defense+ feature via…
    7Monitor
  • ← EarlierCVE-2011-5120Aug 25, 2012 · The Antivirus component in Comodo Internet Security before 5.4.189822.1355 allows remote attackers to cause a denial of service…
    18Monitor
  • Later →CVE-2011-5122Aug 25, 2012 · The Antivirus component in Comodo Internet Security before 5.3.175888.1227 allows remote attackers to cause a denial of service…
    18Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • No special conditions are required; it is repeatable.

If successful

Confidentiality
C · data can be read
Integrity
C · data or configuration can be modified
Availability
C · the service can be disrupted
Attack complexity
Low
Confidentiality impact
C
Integrity impact
C
Availability impact
C

Weakness class (CWE)

CWE-310 · Cryptographic Issues

CVSS vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records