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NVD / CVE Program· CNA talos

CVE-2022-26376: A memory corruption vulnerability exists in the httpd unescape functionality of Asuswrt prior to 3.0.0.4.386_48706 and Asuswrt-Merlin New Ge

Noroxi assessment

Priority: Monitor (action score 39/100)

  • 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: 1.4% (FIRST EPSS); higher than 74.1% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • According to the record, no fixed version is available yet.
  • Severity is disputed: the assigning authority (CNA) scores it 5.3, NVD 9.8.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. 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

A memory corruption vulnerability exists in the httpd unescape functionality of Asuswrt prior to 3.0.0.4.386_48706 and Asuswrt-Merlin New Gen prior to 386.7.. A specially-crafted HTTP request can lead to memory corruption. An attacker can send a network request to trigger this vulnerability.

CriticalCVSS 9.8 · v3.1—No exploit No fix recorded
Published
Aug 5, 2022
Updated
Jun 17, 2026
EPSS
1.4% · 74th percentile

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.4%

CISA SSVC decision

Exploitation
proof of concept
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
9.8
CNA · talos
5.3
4.5 point gap

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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-2022-26376

When you'll hear from us

  • when it enters CISA KEV
  • 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
asusasuswrt
asusxt8 firmware
asusxt8
asustuf-ax3000 v2 firmware
asustuf-ax3000 v2
asusxd4 firmware
asusxd4
asuset12 firmware
asuset12
asusgt-ax6000 firmware
asusgt-ax6000
asusxt12 firmware

and 24 more

Affected versions

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

  • asus asuswrtbefore 3.0.0.4.386_48706
  • asus et12 firmwarebefore 3.0.0.4.386_48823
  • asus gt-ax11000 firmwarebefore 3.0.0.4.386_49559
  • asus gt-ax11000 pro firmwarebefore 3.0.0.4.386_48996
  • asus gt-ax6000 firmwarebefore 3.0.0.4.386_48823
  • asus gt-axe16000 firmwarebefore 3.0.0.4.386_48786
  • asus rt-ax55 firmwarebefore 3.0.0.4.386_49559
  • asus rt-ax56u firmwarebefore 3.0.0.4.386_49559
  • asus rt-ax58u firmwarebefore 3.0.0.4.386_48908
  • asus rt-ax68u firmwarebefore 3.0.0.4.386_49479
  • asus rt-ax82u firmwarebefore 3.0.0.4.386_49380
  • asus rt-ax86u firmwarebefore 3.0.0.4.386_49447
  • asus tuf-ax3000 v2 firmwarebefore 3.0.0.4.386_48750
  • asus xd4 firmwarebefore 3.0.0.4.386_48790
  • asus xd6 firmwarebefore 3.0.0.4.386_49356
  • asus xt12 firmwarebefore 3.0.0.4.386_48823
  • asus xt8 firmwarebefore 3.0.0.4.386_48706
  • asus xt9 firmwarebefore 3.0.0.4.388_20027
  • asuswrt-merlin new genbefore 386.7

Versions reported by the vendor

Affected version ranges reported by the assigning authority (talos). Independent of NVD's CPE analysis and usually ahead of it.

  • Asuswrt-Merlin Asuswrt-Merlin New Gen

    • prior to 386.7affected

Same product

asus: all records

Other highest-scoring records for the same primary product.

  • CVE-2018-6000An issue was discovered in AsusWRT before 3.0.0.4.384_10007.
    65This week
  • CVE-2018-5999An issue was discovered in AsusWRT before 3.0.0.4.384_10007.
    65This week
  • CVE-2018-20334An issue was discovered in ASUSWRT 3.0.0.4.384.20308.
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2017-15656Jan 31, 2018 · Password are stored in plaintext in nvram in the HTTPd server in all current versions (<= 3.0.0.4.380.7743) of Asus asuswrt.
    35Monitor
  • ← EarlierCVE-2018-20333Mar 19, 2020 · An issue was discovered in ASUSWRT 3.0.0.4.384.20308.
    30Monitor
  • ← EarlierCVE-2018-20335Mar 19, 2020 · An issue was discovered in ASUSWRT 3.0.0.4.384.20308.
    30Monitor

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.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

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

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.

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

All records