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CVE-2021-23853

30
FAUCET Score

CVE-2021-23853 is a critical vulnerability affecting various Bosch IP camera models (CPP4, CPP6, CPP7, CPP7.3, and CPP13 series firmware). It allows an unauthenticated attacker to inject arbitrary HTTP headers via crafted URLs due to improper validation. This flaw carries a CVSS score of 9.8 (CRITICAL), indicating a network-based attack with low complexity and high impact on confidentiality, integrity, and availability. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), the vulnerability has garnered significant community discussion with 10 mentions, suggesting awareness among security researchers.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:bosch:cpp4_firmware:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:bosch:cpp6_firmware:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:bosch:cpp7_firmware:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:bosch:cpp7.3_firmware:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:bosch:cpp13_firmware:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.3HIGH

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.6
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.86%
Probability of exploitation in next 30 days
EPSS Percentile
54.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0086 is in the 39th percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (6)

capnprotovendor investigatingvia llm_extracted
gcpvendor investigatingvia llm_extracted
hanwhavendor investigatingvia llm_extracted
kongvendor investigatingvia llm_extracted
openwrtvendor investigatingvia llm_extracted
proxmoxvendor investigatingvia llm_extracted

Vendor Advisories (6)

capnprotollm-capnproto-b4b9f7a55e8d3b52CRITICAL

Multiple vulnerabilities in Bosch IP cameras

Jun 9, 2021
openwrtllm-openwrt-8f54a18c50c2098cCRITICAL

Multiple vulnerabilities in Bosch IP cameras

Jun 9, 2021
gcpllm-gcp-a73d48061e78ad6fCRITICAL

Multiple vulnerabilities in Bosch IP cameras

Jun 9, 2021
kongllm-kong-0abaa5722934d984CRITICAL

Multiple vulnerabilities in Bosch IP cameras

Jun 9, 2021
hanwhallm-hanwha-0df8ed674e2ed08dCRITICAL

Multiple vulnerabilities in Bosch IP cameras

Jun 9, 2021
proxmoxllm-proxmox-4758f853e7b28044CRITICAL

Multiple vulnerabilities in Bosch IP cameras

Jun 9, 2021

References

psirt.bosch.com / security-advisories/bosch-sa-478243-bt.html
Vendor Advisory